Published Research

Increasing time of ignition for PS-clay nanocomposites filled with [Fe(bpy)3]2+-modified hectorite

Hausner, Josef; Fischer, Bianca; Stöter, Matthias; Edenharter, Andreas; Schmid, Jasmin; Kunz, Raphael; Rosenfeldt, Sabine; Altstädt, Volker; Breu, Josef
Polym. Degrad. Stab., 2016

While previously reported polystyrene(PS)-clay nanocomposites all show a reduced time of ignition (tig) compared to the neat polymer, we observe a significant longer tig for a clay filler that has been modified with …

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Reinforcement of nanostructured organogels by hydrogen bonds

Pirner, Daniela; Dulle, Martin; Mauer, Miriam, E.J.; Förster, Stefan
RSC adv., 2016

Organogels based on hydrogen-bond reinforced ordered micellar assemblies, having a very well-defined nanoscale structure and dynamic behaviour, are synthesized and investigated. The organogels consist of block copolymer micelles with covalently linked hydrogen …

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Monodisperse cylindrical micelles and block comicelles of controlled length in aqueous media

Nazemi, Ali; Boott, Charlotte E.; Lunn, David J.; Gwyther, Jessica; Hayward, Dominic W.; Richardson, Robert M.; Winnik, Mitchell A.; Manners, Ian
J. Am. Chem. Soc., 2016

Cylindrical block copolymer micelles have shown considerable promise in various fields of biomedical research. However, unlike spherical micelles and vesicles, control over their dimensions in biologically relevant solvents has posed a key …

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Tunable percolation in semiconducting binary polymer nanoparticle glasses

Renna, Lawrence A.; Bag, Monojit; Gehan, Timothy S.; Han, Xu; Lahti, Paul M.; Maroudas, Dimitrios; Venkataraman, D.
J. Phys. Chem. B., 2016

Binary polymer nanoparticle glasses provide opportunities to realize the facile assembly of disparate components, with control over nanoscale and mesoscale domains, for the development of functional materials. This work demonstrates that tunable …

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Protein-assisted assembly of modular 3D plasmonic raspberry-like core/satellite nanoclusters: correlation of structure and optical properties

Höller, Roland P. M.; Dulle, Martin; Thomä, Sabrina; Mayer, Martin; Steiner, Anja Maria; Förster, Stephan; Fery, Andreas; Kuttner, Christian; Chanana, Munish
ACS Nano, 2016

We present a bottom-up assembly route for a large-scale organization of plasmonic nanoparticles (NPs) into three-dimensional (3D) modular assemblies with core/satellite structure. The protein-assisted assembly of small spherical gold or silver NPs …

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Nanostructuring mixed-dimensional perovskites: a route toward tunable, efficient photovoltaics

Koh, Teck Ming; Shanmugam, Vignesh; Schlipf, Johannes; Oesinghaus, Lukas; Müller-Buschbaum, Peter; Ramakrishnan, N.; Swamy, Varghese; Mathews, Nripan; Boix, Pablo P.; Mhaisalkar, Subodh G.
Adv. Mat., 2016

2D perovskites are one of the proposed strategies to enhance the moisture resistance, since the larger organic cations can act as a natural barrier. Nevertheless, 2D perovskites hinder the charge transport in certain …

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“Cross” supermicelles via the hierarchical assembly of amphiphilic cylindrical triblock comicelles

Li, Xiaoyu; Gao, Yang; Boott, Charlotte E.; Hayward, Dominic W.; Harniman, Robert; Whittell, George R.; Richardson, Robert M.; Winnik, Mitchell A.; Manners, Ian
J. Am. Chem. Soc., 2016

Self-assembled “cross” architectures are well-known in biological systems (as illustrated by chromosomes, for example); however, comparable synthetic structures are extremely rare. Herein we report an in depth study of the hierarchical assembly …

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Hybrid microgels with confined needle-like lanthanide phosphate nanocrystals

Mastour Tehrani, Sepehr; Lin, Wanjuan; Rosenfeldt, Sabine; Guerin, Gerald; Lu, Yijie; Liang, Yi; Drechsler, Markus; Förster, Stephan; Winnik, Mitchell A.
Chem. Mater, 2016

We describe the room-temperature synthesis and characterization of needle-like lanthanide phosphate (LnPO4) nanocrystals in water, based on in situ precipitation of LnPO4 using functional aqueous microgels as a soft nanoreactor. The poly(NIPAm/VCL/MAA) microgels …

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On the twist-bend nematic phase formed directly from the isotropic phase

Dawood, Alya A.; Grossel, Martin C.; Luckhurst, Geoffrey R.; Richardson, Robert M.; Timimi, Bakir A.; Wells, Neil J.; Yousif, Yousif Z.
Liq. Cryst., 2016

The intriguing twist-bend nematic (NTB) phase is formed, primarily, by liquid crystal dimers having odd spacers. Typically, the phase is preceded by a nematic (N) phase via a weak first-order transition. Our …

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Self-Assembly of a Functional Oligo(Aniline)-Based Amphiphile into Helical Conductive Nanowires

Bell, O. Alexander; Wu, Guanglu; Haataja, Johannes S.; Brömmel, Felicitas; Fey, Natalie; Seddon, Annela M.; Harniman, Robert L.; Richardson, Robert M.; Ikkala, Olli; Zhang, Xi
Journal of the American Chemical Society, 2015

A tetra(aniline)-based cationic amphiphile, TANI-NHC(O)C5H10N(CH3)3+Br– (TANI-PTAB) was synthesized, and its emeraldine base (EB) state was found to self-assemble into nanowires in aqueous solution. The observed self-assembly is described by an isodesmic model, as …

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Facile Scalable Synthesis of TiO2/Carbon Nanohybrids with Ultrasmall TiO2 Nanoparticles Homogeneously Embedded in Carbon Matrix

Wang, Xiaoyan; Meng, Jian-Qiang; Wang, Meimei; Xiao, Ying; Liu, Rui; Xia, Yonggao; Yao, Yuan; Metwalli, Ezzeldin; Zhang, Qian; Qiu, Bao; Liu, Zhaoping; Pan, Jing; Sun, Ling-Dong; Yan, Chun-Hua; Müller-Buschbaum, Peter; Cheng, Ya-Jun
ACS Applied Materials and Interfaces, 2015

A facile scalable synthesis of TiO2/C nanohybrids inspired by polymeric dental restorative materials has been developed, which creates ultrasmall TiO2 nanoparticles homogeneously embedded in the carbon matrix. The average size of the nanoparticles …

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Mesoporous tertiary oxides via a novel amphiphilic approach

Bennett, Natasha; Seddon, Annela M.; Hallett, James E.; Kockelmann, Winfried; Ting, Valeska P.; Sadasivan, Sajanikumari; Tooze, Robert P.; Hall, Simon R.
APL Materials, 2015

We report a facile biomimetic sol-gel synthesis using the sponge phase formed by the lipidmonoolein as a structure-directing template, resulting in high phase purity, mesoporous dysprosium- and gadolinium titanates. The stability of monoolein in a 1,4-butanediol and water …

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Co-assembly, spatiotemporal control and morphogenesis of a hybrid protein–peptide system

Inostroza-Brito, Karla E.; Collin, Estelle, Siton-Mendelson, Orit; Smith, Katherine H.; Monge-Marcet, Amàlia; Ferreira, Daniela S.; Pérez Rodríguez, Raúl; Alonso Matilde; Rodríguez-Cabello, José Carlos, Reis, Rui L.; Sagués, Francesc; Botto, Lorenzo; Bitton, Ronit; Azevedo, Helena S.; and Mata, Alvaro
Nature Chemistry , 2015

Controlling molecular interactions between bioinspired molecules can enable the development of new materials with higher complexity and innovative properties. Here we report on a dynamic system that emerges from the conformational modification …

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Docetaxel-Loaded Fluorescent Liquid-Crystalline Nanoparticles for Cancer Theranostics

Meli, Valeria; Caltagirone, Claudia; Falchi, Angela M; Hyde, Stephen T.; Lippolis, Vito; Monduzzi, Maura; Obiols-Rabasa, Marc, Rosa, Antonella; Schmidt, Judith; Talmon, Yeshayahu and Murgia, Sergio
Langmuir, 2015

Here, we describe a novel monoolein-based cubosome formulation engineered for possible theranostic applications in oncology. The Docetaxel-loaded nanoparticles were stabilized in water by a mixture of commercial Pluronic (poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) …

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Two processes of α-phase formation in polypropylene at high supercooling

Schawe, Jürgen E. K.; Vermeulen, Paul A.; van Drongelen, Martin
Thermochimica Acta, 2015

The non-isothermal and isothermal crystallization of different types of commercial polypropylenes (PP) are investigated by fast scanning calorimetry and wide-angle X-ray scattering. Typically, PP shows two different crystallization processes: below 55 °C the …

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Selective Template Removal by Thermal Depolymerization to Obtain Mesostructured Molybdenum Oxycarbide

Schieder, Martin; Lunkenbein, Thomas; Bojer, Carina; Dulle, Martin; vom Stein, Julia; Auffermann, Gudrun; Löbling, Tina; Schöbel, Judith; Schmalz, Holger; Breu, Josef
Zeitschrift für anorganische und allgemeine Chemie, 2015

The carbon content of mesostructured organic-inorganic hybrid material of a cylindrical block copolymer template of poly(2-vinylpyridine)-block-poly(allyl methacrylate) (P2VP-b-PAMA) and ammonium paramolybdate (APM) could be reduced by thermal depolymerization. By calcination in vacuo …

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Surface Chemistry of “Unprotected” Nanoparticles: A Spectroscopic Investigation on Colloidal Particles

Schrader, Imke; Warneke, Jonas; Neumann, Sarah; Grotheer, Sarah; Swane, Andreas Abildgaard; Kirkensgaard, Jacob J. K.; Arenz, Matthias; Kunz, Sebastian
The Journal of Physical Chemistry C, 2015

The preparation of colloidal nanoparticles in alkaline ethylene glycol is a powerful approach for the preparation of model catalysts and ligand-functionalized nanoparticles. For these systems the term “unprotected” nanoparticles has been established …

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Mimicking (Linear) Low-Density Polyethylenes Using Modified Polymacrolactones

Pepels, Mark PF; Koeken, Ronald AC; van der Linden, Sjoerd JJ; Heise, Andreas; Duchateau, Rob
Macromolecules, 2015

This paper presents a new approach toward the introduction of both short- (SCB) and long-chain branching (LCB) in polyethylene-like polyesters via the ring-opening polymerization of macrolactones. Macrolactones containing an alkyl (S1) or …

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Aromatic Gain in a Supramolecular Polymer

Saez Talens, Victorio; Englebienne, Pablo; Trinh, Thuat T.; Noteborn, Willem EM; Voets, Ilja K.; Kieltyka, Roxanne E.
Angewandte Chemie, 2015

The synergy of aromatic gain and hydrogen bonding in a supramolecular polymer is explored. Partially aromatic bis(squaramide) bolaamphiphiles were designed to self-assemble through a combination of hydrophobic, hydrogen-bonding, and aromatic effects into …

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Liquid-phase characterization of molecular interactions in polyunsaturated and n-fatty acid methyl esters by 1H low-field nuclear magnetic resonance

Meiri, Nitzan; Berman, Paula; Colnago, Luiz Alberto; Moraes, Tiago Bueno; Linder, Charles; Wiesman, Zeev
Biotechnology for Biofuels, 2015

Background To identify and develop the best renewable and low carbon footprint biodiesel substitutes for petroleum diesel, the properties of different biodiesel candidates should be studied and characterized with respect to molecular …

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The Coil-to-Globule Transition of Single-Chain Polymeric Nanoparticles with a Chiral Internal Secondary Structure

ter Huurne, Gijs M.; Gillissen, Martijn AJ; Palmans, Anja RA; Voets, Ilja K.; Meijer, E. W.
Macromolecules, 2015

The intramolecular folding of chiral single polymeric chains into single-chain polymeric nanoparticles (SCPNs) via π-stacking was investigated. To this end, hydrophilic polymers grafted with structuring, chiral 3,3′-bis(acylamino)-2,2′-bipyridine-substituted benzene-1,3,5-tricarboxamides (BiPy-BTAs) units were prepared …

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Supramolecular polymers for organocatalysis in water

Neumann, Laura N.; Baker, Matthew B.; Leenders, Christianus MA; Voets, Ilja K.; Lafleur, René PM; Palmans, Anja RA; Meijer, E. W.
Organic & biomolecular chemistry, 2015

A water-soluble benzene-1,3,5-tricarboxamide (BTA) derivative that self-assembles into one-dimensional, helical, supramolecular polymers is functionalised at the periphery with one L-proline moiety. In water, the BTA-derivative forms micrometre long supramolecular polymers, which are stabilised …

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Simultaneous Enhancement of Solar Cell Efficiency and Stability by Reducing the Side Chain Density on Fluorinated PCPDTQx Copolymers

Verstappen, Pieter; Kesters, Jurgen; D'Olieslaeger, Lien; Drijkoningen, Jeroen; Cardinaletti, Ilaria; Vangerven, Tim; Bruijnaers, Bardo J.; Willems, Robin EM; D'Haen, Jan; Manca, Jean V.; others
Macromolecules, 2015

The performance of polymer solar cells is strongly dependent on the morphology of the photoactive layer, which can be optimized by tuning the polymer side chain pattern. Whereas most studies focus on …

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Sugar–Bile Acid-Based Bolaamphiphiles: From Scrolls to Monodisperse Single-Walled Tubules

Gubitosi, Marta; Travaglini, Leana; D'Annibale, Andrea; Pavel, Nicolae V.; Váquez Tato, ; Obiols-Rabasa, Marc; Sennato, Simona; Olsson, Ulf; Schillén, Karin; Galantini, Luciano
Langmuir, 2014

The introduction of a mannose residue on carbon 3 of lithocholic acid gives rise to an asymmetric and rigid bolaamphiphilic molecule, which self-assembles in water to form elongated tubular aggregates with an …

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Sustainable thermoplastic elastomers derived from plant oil and their “click-coupling” via TAD chemistry

Wang, Zhongkai; Yuan, Liang; Trenor, Nathan M.; Vlaminck, Laetitia; Billiet, Stijn; Sarkar, Amrita; Du Prez, Filip E.; Stefik, Morgan; Tang, Chuanbing
Green Chemistry, 2015

We report the preparation of plant oil based triblock copolymers based on soybean oil monomers. The monomers were polymerized via atom transfer radical polymerization with subsequent chain extension, resulting in poly(styrene-b-soybean oil acrylate-b-styrene) (PS-b-PSBA-b-PS) …

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In Situ Formation of a MoS2-Based Inorganic–Organic Nanocomposite by Directed Thermal Decomposition

Djamil, John; Segler, Stefan AW; Bensch, Wolfgang; Schürmann, Ulrich; Deng, Mao; Kienle, Lorenz; Hansen, Sven; Beweries, Torsten; von Wüllen, Leo; Rosenfeldt, Sabine; others
2015, Chemistry-A European Journal

Nanocomposites based on molybdenum disulfide (MoS2) and different carbon modifications are intensively investigated in several areas of applications due to their intriguing optical and electrical properties. Addition of a third element may …

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Tailoring Supramolecular Nanotubes by Bile Salt Based Surfactant Mixtures

Gubitosi, Marta; Travaglini, Leana; di Gregorio, Maria Chiara; Pavel, Nicolae V.; Vázquez‚ Tato, José; Sennato, Simona; Olsson, Ulf; Schillén, Karin; Galantini, Luciano
Angewandte Chemie International Edition, 2015

An approach for tailoring self-assembled tubular structures is described. By controlling the relative composition of a two-component surfactant mixture comprising the natural bile salt lithocholate and its bolamphiphilic derivative, it was possible …

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Reversible gold nanorod alignment in mechano-responsive elastomers

Pletsch, Holger; Tebbe, Moritz; Dulle, Martin; Förster, Beate; Fery, Andreas; Förster, Stephan; Greiner, Andreas; Agarwal, Seema
Polymer, 2015

Inspired by an increasing demand for stimuli-controlled assembly of nanostructures, mechano-responsive nanocomposites are designed with tremendous scope in material applications. Providing switchable properties by means of mechanical stimulation, elastomer-incorporated gold nanorods (AuNR) …

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SAXS Analysis of Shell Formation During Nanocapsule Synthesis via Inverse Miniemulsion Periphery RAFT Polymerization

Utama, Robert H.; Dulle, Martin; Förster, Stephan; Stenzel, Martina H.; Zetterlund, Per B.
Macromolecular Rapid Communications, 2015

Currently available methods for synthesis of polymeric nanocapsules only offer limited control over the shell thickness, even though it is an important parameter for various applications. Furthermore, suitable methods to critically measure …

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GISAXS and TOF-GISANS studies on surface and depth morphology of self-organized TiO2 nanotube arrays: model anode material in Li-ion batteries

Paul, Neelima; Brumbarov, Jassen; Paul, Amitesh; Chen, Ying; Moulin, J.-F.; Müller-Buschbaum, Peter; Kunze-Liebhäuser, Julia; Gilles, Ralph
Journal of Applied Crystallography, 2015

Self-organized anodic titania (TiO2) nanotube arrays are an interesting model anode material for use in Li-ion batteries owing to their excellent rate capability, their cycling stability and their enhanced safety compared to …

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Bioinspired Reversibly Cross-linked Hydrogels Comprising Polypeptide Micelles Exhibit Enhanced Mechanical Properties

Ghoorchian, Ali; Simon, Joseph R.; Bharti, Bhuvnesh; Han, Wei; Zhao, Xuanhe; Chilkoti, Ashutosh; López, Gabriel P.
Advanced Functional Materials, 2015

Noncovalently cross-linked networks are attractive hydrogel platforms because of their facile fabrication, dynamic behavior, and biocompatibility. The majority of noncovalently cross-linked hydrogels, however, exhibits poor mechanical properties, which significantly limit their utility …

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A tryptophan-substituted cholic acid: Expanding the family of labelled biomolecules

Travaglini, Leana; Gubitosi, Marta; di Gregorio, Maria Chiara; D'Annibale, Andrea; Meijide, Francisco; Giustini, Mauro; Sennato, Simona; Obiols-Rabasa, Marc; Schillén, Karin; Pavel, Nicolae Viorel; others
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2015

The synthesis of a novel cholic acid derivative bearing in the C-3 position a residue of tryptophan linked through an amide bond is herein described. Acidic or basic conditions are needed for …

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Selective Absorption of Hydrophobic Cations in Nanostructured Porous Materials from Crosslinked Hydrogen-Bonded Columnar Liquid Crystals

Bögels, Gerardus M.; van Kuringen, Huub PC; Shishmanova, Ivelina K.; Voets, Ilja K.; Schenning, Albertus PHJ; Sijbesma, Rint P.
Advanced Materials Interfaces, 2015

A nanostructured porous material is obtained by crosslinking of a self-assembled system consisting of columnar liquid crystals with polyamines and removal of the template. For this purpose, a columnar liquid crystal with …

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Unilamellar Vesicles from Amphiphilic Graphene Quantum Dots

Nandi, Sukhendu; Kolusheva, Sofiya; Malishev, Ravit; Trachtenberg, Alexander; Vinod, T. P.; Jelinek, Raz
Chemistry - A European Journal, 2015

Graphene quantum dots (GQDs) have attracted considerable interest due to their unique physicochemical properties and various applications. For the first time it is shown that GQDs surface-functionalized with hydrocarbon chains (i.e., amphiphilic …

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Bio-based barrier materials

Kleppinger, Ralf; Martens, Hans; Tandler, Renate; Soliman, Maria
Society of Plastics Engineers, 2015

Multilayered polyolefin-based film systems are being used in packaging industry to add various functionalities by tailoring layer sequences, thickness and type of the material used in the final application. A new concept …

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Encapsulation of Functional Organic Compounds in Nanoglass for Optically Anisotropic Coatings

Stöter, Matthias; Biersack, Bernhard; Rosenfeldt, Sabine; Leitl, Markus J.; Kalo, Hussein; Schobert, Rainer; Yersin, Hartmut; Ozin, Geoffrey A.; Förster, Stephan; Breu, Josef
Angewandte Chemie International Edition, 2015

A novel approach is presented for the encapsulation of organic functional molecules between two sheets of 1 nm thin silicate layers, which like glass are transparent and chemically stable. An ordered heterostructure with …

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Consequences of chirality on the dynamics of a water-soluble supramolecular polymer

Baker, Matthew B.; Albertazzi, Lorenzo; Voets, Ilja K.; Leenders, Christianus MA; Palmans, Anja RA; Pavan, Giovanni M.; Meijer, E. W.
Nature communications, 2015

The rational design of supramolecular polymers in ​water is imperative for their widespread use, but the design principles for these systems are not well understood. Herein, we employ a multi-scale (spatial and temporal) …

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Reduced Phase Separation and Slowing of Dynamics in Polyurethanes with Three-Dimensional POSS-Based Cross-Linking Moieties

Raftopoulos, Konstantinos N.; Koutsoumpis, Stefanos; Jancia, Małgorzata; Lewicki, James P.; Kyriakos, Konstantinos; Mason, Harris E.; Harley, Stephen J.; Hebda, Edyta; Papadakis, Christine M.; Pielichowski, Krzysztof; Pissis, Polycarpos
Macromolecules, 2015

Octa-OH-functional POSS has been incorporated into a model polyurethane elastomer as a comparatively massive and notionally “robust” 3-dimensional cross-linking core. The effects of this cross-linking moiety on the morphology and molecular dynamics …

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Preparation and Properties of a Graphene Oxide Intercalation Compound Utilizing Hydrocalumite Layered Double Hydroxide as Host Structure

Plank, Johann; Zou, Nan; Zhao, Zongbin; Dekany, Imre
Zeitschrift für anorganische und allgemeine Chemie, 2014

Particularly small graphene oxide (GO) nano sheets were synthesized and intercalated into a hydrocalumite type layered double hydroxide (Ca2Al-LDH) host structure. Synthesis of the GO intercalation compound was performed via controlled rehydration …

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Liquid Crystals of Self-Assembled DNA BottlebrushesThe Journal of Physical Chemistry B

Storm, Ingeborg M.; Kornreich, Micha; Hernandez-Garcia, Armando; Voets, Ilja K.; Beck, Roy; Cohen Stuart, Martien A.; Leermakers, Frans A. M.; de Vries, Renko
The Journal of Physical Chemistry B, 2015

Early theories for bottlebrush polymers have suggested that the so-called main-chain stiffening effect caused by the presence of a dense corona of side chains along a central main chain should lead to …

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Effect of biotechnologically modified alginates on LDH structures

Sieber, Volker; Plank, Johann; Sperl, Nadine; Schmid, Jochen; de Reese, Johanna
Bioinspired, Biomimetic and Nanobiomaterials, 2015

Four alginates possessing different guluronic/mannuronic acid ratios and one acetylated alginate were investigated with respect to their behaviour during intercalation into layered double hydroxides (LDHs). Two alginates were commercial products while the …

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Solvothermal synthesis of hierarchical Eu 2 O 3 nanostructures templated by PS-b-PMAA: morphology control via simple variation of water contents

Xiao, Ying; Wang, Xiaoyan; Wagner, Thomas; Thiel, Jürgen; Yao, Yuan; Lin, Yichao; Metwalli, Ezzeldin; Liu, Rui; Butt, Hans Jürgen; Müller-Buschbaum, Peter; others
Journal of Materials Chemistry A, 2015

A new method to synthesize hierarchical Eu2O3 nanostructures via a solvothermal process inN,N′-dimethyl formamide (DMF) templated by an ionic amphiphilic diblock copolymer polystyrene-block-poly (methacrylic acid) (PS-b-PMAA) has been developed. By simply varying the mass ratio …

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Study of liquid-phase molecular packing interactions and morphology of fatty acid methyl esters (biodiesel)

Berman, Paula; Meiri, Nitzan; Colnago, Luiz A.; Moraes, Tiago B.; Linder, Charles; Levi, Ofer; Parmet, Yisrael; Saunders, Michael; Wiesman, Zeev
Biotechnology for Biofuels, 2015

Background 1H low field nuclear magnetic resonance (LF-NMR) relaxometry has been suggested as a tool to distinguish between different molecular ensembles in complex systems with differential segmental or whole molecular motion and/or …

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Thermo-Resistant Soft Glassy Suspensions of Polymeric Micellar Nanoparticles in Ionic Liquid

Gkermpoura, Sandra; Obiols-Rabasa, Marc; Iatridi, Zacharoula; Tsitsilianis, Constantinos
ACS Applied Materials & Interfaces, 2015

We report the rheological and structural properties of a suspension comprising poly(ethylene oxide)–polystyrene–poly(ethylene oxide) core–shell micellar nanoparticles dispersed in 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid. A liquid to soft solid transition was observed at …

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Polymeric Flower-Like Microparticles from Self-Assembled Cellulose Stearoyl Esters

Zhang, Kai; Geissler, Andreas; Chen, Xuelian; Rosenfeldt, Sabine; Yang, Yongbiao; Förster, Stephan; Müller-Plathe, Florian
ACS Macro Letters, 2015

Flower-like particles (FLPs) with hierarchical surface architectures have recently attracted considerable attention due to their potentially wide application range. Hitherto, nearly all FLPs were fabricated using inorganic compounds, while versatile organic polymers …

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Structural disordering of de-alloyed Pt bimetallic nanocatalysts: the effect on oxygen reduction reaction activity and stability

Spanos, Ioannis; Dideriksen, Knud; Kirkensgaard, Jacob J. K.; Jelavic, Stanislav; Arenz, Matthias
Physical Chemistry Chemical Physics, 2014

Platinum bimetallic alloys are well-known for their ability to catalyze the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs). PtxCo1−x colloidal nanoparticles were synthesized with varying initial Pt:Co ratios, but …

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Self-organization of Fe clusters on mesoporous TiO2 templates

Ziegler, Patrick; Paul, Neelima; Müller-Buschbaum, Peter; Wiedemann, Birgit; Kreuzpaintner, Wolfgang; Jutimoosik, Jaru; Yimnirun, Rattikorn; Setzer, Annette; Esquinazi, Pablo; Böni, Peter; Paul, Amitesh
Journal of Applied Crystallography, 2014

Fe layers with thicknesses between 5 and 100 nm were sputtered on mesoporous nanostructured anatase TiO2 templates. The morphology of these hybrid films was probed with grazing-incidence small-angle X-ray scattering and X-ray reflectivity, complemented …

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Structure and ionic conductivity of liquid crystals having propylene carbonate units

Eisele, Andreas; Kyriakos, Konstantinos; Bhandary, Rajesh; Schönhoff, Monika; Papadakis, Christine M.; Rieger, Bernhard
Journal of Materials Chemistry A, 2015

Liquid-crystalline compounds with a perfluorinated aromatic ring as the mesogenic core and a propylene carbonate unit were prepared and mixed with lithium bis(trifluoro-methanesulfonyl)-imide (LiTFSI). The self-assembly was driven by the interaction of …

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Nematic Ordering of SWNT in Meso-Structured Thin Liquid Films of Polystyrenesulfonate

Itzhak-Cohen, Racheli; Nativ-Roth, Einat; Levi-Kalisman, Yael; Josef, Elinor; Szleifer, Igal; Yerushalmi-Rozen, Rachel
Langmuir, 2014

The formation of nematic-like islands of single-walled carbon nanotubes (SWNT) in polystyrenesulfonate (PSS) dispersions confined into nanometrically thin films is reported. The SWNT are observed to assemble into orientationally ordered phases, where …

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Plasmonic gold–poly(N-isopropylacrylamide) core–shell colloids with homogeneous density profiles: a small angle scattering study

Dulle, Martin; Jaber, Sarah; Rosenfeldt, Sabine; Radulescu, Aurel; Förster, Stephan; Mulvaney, Paul; Karg, Matthias
Phys. Chem. Chem. Phys., 2015

Coating metal nanocrystals with responsive polymers provides a model case of smart, functional materials, where the optical properties can be modulated by external stimuli. However the optical response is highly sensitive to …

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Nanopatterned Superlattices in Self-Assembled C2-Symmetric Oligodimethylsiloxane-Based Benzene-1, 3, 5-Tricarboxamides

Garía-Iglesias, Miguel; de Waal, Bas FM; de Feijter, Isja; Palmans, Anja RA; Meijer, E. W.
Chemistry-A European Journal, 2015

The synthesis of C3– and C2-symmetric benzene-1,3,5-tricarboxamides (BTAs) containing well-defined oligodimethylsiloxane (oDMS) and/or alkyl side chains has been carried out. The influence of the bulkiness of the oDMS chains in the aggregation behavior of dilute …

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Orientation specific deposition of mesoporous particles

Kjellman, Tomas; Bodén, Niklas; Wennerström, Håkan; Edler, Karen J.; Alfredsson, Viveka
APL Materials, 2014

We present a protocol for a facile orientation specific deposition of plate-like mesoporous SBA-15 silica particles onto a surface (mesopores oriented normal to surface). A drop of an aqueous dispersion of particles is placed on the surface and water vaporizes under controlled …

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Die-drawn HDPE pipes: crystalline and lamellae orientation

Kleppinger, Ralf; Taraiya, Ajay; Handstanger, Ralph; Soliman, Maria
Society of Plastics engineers, 2014

It is well known that mechanical properties of isotropic polymer systems, such as tensile modulus and strength, can be considerably improved by orientation of chain molecules. This can be achieved by deforming …

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Interactions of Small Dendrimers with Sodium Dodecyl Sulfate at the Air-Water Interface

Yanez Arteta, Marianna; Campbell, Richard A.; Watkins, Erik B.; Obiols-Rabasa, Marc; Schillén, Karin; Nylander, Tommy
The Journal of Physical Chemistry B, 2014

We have determined how the bulk behavior of mixtures of small cationic poly(amidoamine) dendrimers (generation 2, PAMAM-G2) and sodium dodecyl sulfate (SDS) affects the structure and composition of the adsorbed layers at …

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Fast Diffusion-Limited Lyotropic Phase Transitions Studied in Situ Using Continuous Flow Microfluidics/Microfocus-SAXS

With, Sebastian; Trebbin, Martin; Bartz, Christian B. A.; Neuber, Christian; Dulle, Martin; Yu, Shun; Roth, Stephan V.; Schmidt, Hans-Werner; Förster, Stephan
Langmuir, 2014

Fast concentration-induced diffusion-limited lyotropic phase transitions can be studied in situ with millisecond time resolution using continuous flow microfluidics in combination with microfocus small-angle X-ray scattering. The method was applied to follow …

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Nanoporous Sheets and Cylinders via Bulk Templating of Triblock Terpolymer/Homopolymer Blends

Betthausen, Eva; Dulle, Martin; Hanske, Christoph; Müller, Melanie; Fery, Andreas; Förster, Stephan; Schacher, Felix H.; Müller, Axel HE
Macromolecules, 2014

The selective cross-linking of individual domains in block copolymer bulk morphologies represents an elegant strategy to generate nanostructured materials of tunable size and geometry. We demonstrate the preparation of highly periodic nanoporous …

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Intercalation of cellulase enzyme into a hydrotalcite layer structure

Zou, N.; Plank, J.
Journal of Physics and Chemistry of Solids, 2015

A new inorganic–organic hybrid material whereby cellulase enzyme is incorporated into a hydrotalcite type layered double hydroxide (LDH) structure is reported. The Mg2Al–cellulase–LDH was synthesized via co-precipitation from Mg/Al nitrate at pH=9.6. …

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The Effect of Protein PEGylation on Physical Stability in Liquid Formulation

Holm, Louise Stenstrup; Mcumber, Aaron; Rasmussen, Jakob Ewald; Obiols-Rabasa, Marc; Thulstrup, Peter W.; Kasimova, Marina R.; Randolph, Theodore W.; van de Weert, Marco
Journal of Pharmaceutical Sciences, 2014

The presence of micron aggregates in protein formulations has recently attracted increased interest from regulatory authorities, industry, and academia because of the potential undesired side effects of their presence. In this study, …

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Comparative degradation study of carbon supported proton exchange membrane fuel cell electrocatalysts – The influence of the platinum to carbon ratio on the degradation rate

Speder, Jozsef; Zana, Alessandro; Spanos, Ioannis; Kirkensgaard, Jacob JK; Mortensen, Kell; Hanzlik, Marianne; Arenz, Matthias
Journal of Power Sources, 2014

A colloidal synthesis approach is used to prepare supported proton exchange membrane fuel cell (PEMFC) catalysts with various Pt loadings e from low to extremely high ones. The catalyst samples are used …

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A designer peptide as a template for growing Au nanoclusters

de la Rica, Roberto; Chow, Lesley ;Horejs, Christine-Maria.; Mazo, Manuel; Chiappini, Ciro; Pashuck, E. Thomas; Bitton, Ronit; Stevens Molly M.
Chemical Communications, 2014

A peptide was designed to generate a sub-nanometric template that guides the growth of fluorescent gold nanoclusters. The peptide was endorsed with nucleating moieties and a three-dimensional structure that arrests the growth …

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On the self-assembly of a tryptophan labeled deoxycholic acid

Travaglini, Leana; Gubitosi, Marta; Gregorio, Maria Chiara di; Pavel, Nicolae Viorel; D'Annibale, Andrea; Giustini, Mauro; Tellini, Victor Hugo Soto; Tato, José Vázquez; Obiols-Rabasa, Marc; Bayati, Solmaz; Galantini, Luciano
Physical Chemistry Chemical Physics, 2014

Self-assembly of peptides and bile acids has been widely investigated because of their biological role and their potential as a tool for the preparation of nanostructured biomaterials. We herein report both the …

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Core-shell TiO2@C: towards alternative supports as replacement for high surface area carbon for PEMFC catalysts

Zana, Alessandro; Ruediger, Celine; Kunze-Liebhäeuser, Julia; Granozzi, Gaetano; Reeler, Nini EA; Vosch, Tom; Kirkensgaard, Jacob JK; Arenz, Matthias
Electrochimica Acta, 2014

In this work, corrosion resistant TiO2@C powder was tested as possible alternative to standard carbon black supports for polymer electrolyte membrane fuel cells. We separately prepared a stock solution of well-defined Pt …

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Superparamagnetic regular nanopillar-like structures studied by grazing-incidence X-ray scattering: effect of vertical correlation

Paul, Amitesh; Paul, Neelima; Müller-Buschbaum, Peter; Bauer, Andreas; B√∂ni, Peter
Journal of Applied Crystallography, 2014

Grazing-incidence small-angle X-ray scattering is reported from nanoclusters in superparamagnetic (SPM) polycrystalline Co separated by Au. The self-organization of the Co nanoclusters is in the form of nanopillar-like structures with high perpendicular …

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From single crystal model catalysts to systematic studies of supported nanoparticles

Speder, Jozsef; Spanos, Ioannis; Zana, Alessandro; Kirkensgaard, Jacob JK; Mortensen, Kell; Altmann, Lena; Bäumer, Marcus; Arenz, Matthias
Surface Science, 2015

In the presented work we discuss our recent efforts to bridge the study of so-called model catalysts like well-defined single crystals and investigations of industrial catalysts, which are relatively ill-defined. Our work …

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Folding Polymers with Pendant Hydrogen Bonding Motifs in Water: The Effect of Polymer Length and Concentration on the Shape and Size of Single-Chain Polymeric Nanoparticles

Stals, Patrick J. M.; Gillissen, Martijn A. J.; Paffen, Tim F. E.; de Greef, Tom F. A.; Lindner, Peter; Meijer, E. W.; Palmans, Anja R. A.; Voets, Ilja K.
Macromolecules, 2014

A set of random copolymers based on a benzene-1,3,5-tricarboxamide functional methacrylate (BTAMA) and oligoethylene glycol methacrylate (oEGMA) with different degrees of polymerization (DP, from 110 to 450) and a 10 mol % …

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Cation Diffusion Facilitators Transport Initiation and Regulation is Mediated by Cation Induced Conformational Changes of the Cytoplasmic Domain

Zeytuni, Natalie; Uebe, René; Maes, Michal; Davidov, Geula; Baram, Michal; Raschdorf, Oliver; Nadav-Tsubery, Merav; Kolusheva, Sofiya; Bitton, Ronit; Goobes, Gil; others
PloS one, 2014

Cation diffusion facilitators (CDF) are part of a highly conserved protein family that maintains cellular divalent cation homeostasis in all domains of life. CDF’s were shown to be involved in several human …

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The particle proximity effect: from model to high surface area fuel cell catalysts

Speder, Jozsef; Altmann, Lena; Bäumer, Marcus; Kirkensgaard, Jacob J. K.; Mortensen, Kell; Arenz, Matthias
RSC Advances, 2014

In this work, Pt nanoparticles prepared by a colloidal method are supported on high surface area carbons. The electrocatalysts synthesized by this method have well-separated, size-controlled nanoparticles with tunable interparticle distance, and …

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Hydrogels from phospholipid vesicles

Gräbner, D.; Hoffmann, H.; Förster, S.; Rosenfeldt, S.; Linders, J.; Mayer, C.; Talmon, Y.; Schmidt, J.
Advances in Colloid and Interface Science, 2014

It is shown that phospholipid dispersions with a few percent of diacylphosphocholine PC in water can be swollen to single-phase lyotropic liquid crystalline Lα-phases by the addition of co-solvents like glycerol, 1,3-butyleneglycol …

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Monodisperse PEGylated Spheres: An Aqueous Colloidal Model System

Ulama, Jeanette; Zackrisson Oskolkova, Malin; Bergenholtz, Johan
The Journal of Physical Chemistry B, 2014

Fluorinated core–shell spheres have been synthesized using a novel semibatch emulsion polymerization protocol employing slow feeding of the initiator. The synthesis results in aqueous dispersions of highly monodisperse spheres bearing a well-defined …

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Triborheology and orientational dynamics of ionic liquid crystals

Pogodina, N. V.; Amann, T.; Dold, C.; Metwalli, E.; Müller-Buschbaum, P.; Kailer, A.; Friedrich, C.
Journal of Molecular Liquids, 2014

We present studies of triborheological properties and orientational dynamics of three imidazolium-based ionic liquids (ILs) [C14mim][BF4], [C14mim][PF6] and [C14mim][Tf2N], by utilizing a variety of physical methods including DSC, SAXS/WAXS, rheology, flow dichroism …

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Occurrence of intercalation of PCE superplasticizers in calcium aluminate cement under actual application conditions, as evidenced by SAXS analysis

Ng, Serina; Metwalli, Ezzeldin; Müller-Buschbaum, Peter; Plank, Johann
Cement and Concrete Research, 2013

Intercalation of polycarboxylate (PCE) superplasticizers in calcium aluminate cement (CAC) during early hydration under both idealized and actual application conditions was confirmed by small-angle X-ray scattering (SAXS) analysis. The CaAl-PCE-LDHs were characterized …

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From polyethylene to polyester: influence of ester groups on the physical properties

Pepels, Mark PF; Hansen, Michael Ryan; Goossens, Han; Duchateau, Rob
Macromolecules, 2013

Aliphatic long-chain polyesters (ALCPEs) were synthesized using the ring-opening metathesis copolymerization of ambrettolide and cis-cyclooctene followed by exhaustive hydrogenation, yielding saturated ALCPEs with methylene-to-ester ratios (M/E) varying from 15 to 223 and ∞ …

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Direct Observation of Plugs and Intrawall Pores in SBA-15 Using Low Voltage High Resolution Scanning Electron Microscopy and the Influence of Solvent Properties on Plug-Formation

Kjellman, Tomas; Asahina, Shunsuke; Schmitt, Julien; Impéror-Clerc, Marianne; Terasaki, Osamu; Alfredsson, Viveka
Chemistry of Materials, 2013

Through the use of low voltage high resolution scanning electron microscopy (LV-HRSEM) we have studied the fine details of the intricate pore structure of SBA-15. Intrawall pores and deviations from the ideal …

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