Article
Materials Science, Multidisciplinary
Julien Crozzolo, Georges J. M. Formon, Mickael Pomes-Hadda, Stefano Aime, Stephane Jouenne, Renaud Nicolay
Summary: This study investigates the association behavior of complementary polyacrylamides in aqueous solutions. The functionality, charge degree, and molar mass of the copolymers were found to be influential in controlling the flow properties and viscosity of the formulations. Rheology and dynamic light scattering were used to characterize the formulations, and a thermoresponsive hydrogel was prepared.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Spyridon Varlas, Thomas J. Neal, Steven P. Armes
Summary: This study explores the use of hydrophilic monomers for the chain extension of linear diblock copolymer vesicles using the RAFT aqueous dispersion polymerization method. It is found that this method can convert the precursor vesicles into lower-order worms or spheres, allowing for the control of nano-object morphology.
Article
Polymer Science
Eman Ahmed, C. Tyler Womble, Jinwon Cho, Kristen Dancel-Manning, William J. Rice, Seung Soon Jang, Marcus Weck
Summary: Compartmetalized micelles are prepared through self-assembly of linear triblock terpolymers with control over block sequence and distribution, offering a facile approach for target material synthesis. Various morphologies such as core-shell-corona, disk-like, raspberry-like and worm-like are observed using cryogenic transmission electron microscopy and dissipative particle dynamics simulations.
Article
Polymer Science
Miki Morimura, Shohei Ida, Masatoshi Oyama, Hiroki Takeshita, Shokyoku Kanaoka
Summary: A thermoresponsive hydrogel with a unique crosslinked domain (CD) structure was designed to exhibit thermoresponsive toughening in an isochoric manner in air, eliminating the need for external water for the transition. The gel's dispersed CDs showed reversible swelling and shrinking in response to temperature changes without aggregation, leading to an increase in elastic modulus and elongation at high temperatures.
Article
Biochemistry & Molecular Biology
Yoshihiro Yamakita, Issei Takeuchi, Kimiko Makino, Hiroshi Terada, Akihiko Kikuchi, Kolio Troev
Summary: In this study, amphiphilic polyphosphoesters based on poly(oxyethylene H-phosphonate)s (POEHP) were synthesized using polycondensation reactions with varying lengths of poly(ethylene glycol) segments and aliphatic alcohols. The effects of polymer structure on micelle formation and stability were investigated, and it was found that the hydrophilic/hydrophobic balance of these polymers can be controlled by changing the chain lengths of hydrophilic PEG and hydrophobic alcohols.
Article
Chemistry, Physical
Fuat Topuz
Summary: Thermoresponsive hydrogels were synthesized by cross-linking DNA strands with an isocyanate cross-linker. Scanning force microscopy revealed the ultrastructure of the DNA network and the temperature-mediated transition. Dynamic oscillatory and large deformation creep tests demonstrated the formation of robust cross-linked gels. Scanning electron microscopic analysis showed the non-porous internal morphology of the hydrogel.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Michelle Hechenbichler, Albert Prause, Michael Gradzielski, Andre Laschewsky
Summary: A nonionic double hydrophilic block copolymer is synthesized using RAFT, with one hydrophilic and one thermoresponsive block. The copolymer acts as a polymeric surfactant at low temperatures, forming hairy micelles, and as an associative telechelic polymer at elevated temperatures, forming large dynamic aggregates, especially in a microemulsion.
Article
Polymer Science
Xiaohua Chang, Dengwen Hu, Liangren Chen, Yaping Wang, Yutian Zhu
Summary: Thermoresponsive block copolymer micelles have potential in biological applications, with studies showing that changes in hydrophobic/hydrophilic block ratio, micelle concentration and addition of salt can alter the cloud point. Increasing the amount of PLGA hydrophobic block significantly decreases the cloud point, while higher micelle concentration and salt addition also lower the cloud point.
Article
Polymer Science
Lauren E. E. Ball, Gabriela Garbonova, Rueben Pfukwa, Bert Klumperman
Summary: Responsive triblock copolymers were synthesized and studied for their potential use in drug delivery systems in biomedical research.
Article
Chemistry, Physical
Haiyang Zhang, Xuan Feng, Xiuyang Xia, Jiao Zhu, Huaguang Wang, Ran Ni, Zexin Zhang
Summary: The self-assembly of hybrid colloids, driven by chemical concentration gradients generated by photocatalytic reactions, is investigated. Different shapes of the colloids lead to the formation of assemblies with distinct lattice structures, validated by computer simulations. Moreover, the assemblies transition from lattices to chains as the attraction between the colloids increases. These findings demonstrate the unique capability of photoresponsive hybrid colloids in shape-dependent self-assembly, offering a practical and versatile approach to control self-assembly at the microscale.
Article
Chemistry, Multidisciplinary
Sai S. Patkar, Yao Tang, Arriana M. Bisram, Tianren Zhang, Jeffery G. Saven, Darrin J. Pochan, Kristi L. Kiick
Summary: Researchers genetically fused thermoresponsive resilin-like polypeptides (RLPs) of various lengths with coiled coil-forming peptides to develop new strategies for assembling coiled coil peptides via temperature-triggered phase separation. Their successful production was confirmed through various analyses. The stability of the coiled coils and the thermosensitive phase behavior of the RLPs were preserved in the genetically fused hybrid polypeptides, leading to their noncovalent assembly into nanofibrillar structures when triggered by temperature.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Susama Chakraborty, Ankana Karmakar, Suraj Mandal, Tamal Goswami, Pranab Ghosh, Amitava Mandal
Summary: The present study focuses on the supramolecular host-guest complexation of OCASP into b-CD, resulting in a thermoresponsive nanotubular architecture. The inclusion complex was characterized using various techniques, and the formation of nanotubes was observed. The reversible switching of assembly and disassembly of the system was demonstrated by temperature changes. Hydrophobic interactions were identified as the main driving force behind the hierarchical structure formation, as confirmed by control experiments. Molecular dynamics simulations further elucidated the stepwise formation process of this hierarchy. This stimuli-responsive system has the potential to tailor its physical properties and contribute to the fabrication of novel smart materials.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Maisam Jalaly, Reza Hosseini, Ali Bakhshi, Morteza Chehelamirani
Summary: Graphene aerogel and graphene-magnetite hybrid aerogel were prepared using hydrothermal method followed by a freeze-drying process. The addition of Fe3O4 nanoparticles improved the mechanical properties and thermal stability of the aerogels, and enhanced their thermal insulation performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Anna P. Constantinou, Nikitas Provatakis, Qian Li, Theoni K. Georgiou
Summary: The addition of OEGMA300(x) homopolymers of varying molar mass does not disrupt the gelation characteristics of the best performing ABC triblock terpolymer, and stronger gels are formed when higher molar mass OEGMA300(x) homopolymers are added.
Article
Chemistry, Physical
Shuxin Zhou, Qinhong Wei, Huailin Fan, Yuanrong Zhang, Guoming Gao, Xun Hu
Summary: A tannin-derived framework-like carbon material with well-developed porosity and thermal stability is obtained by cross-linking and self-assembly strategy. The material exhibits excellent specific surface area and nitrogen doping, making it a promising electrode for Zn-ion hybrid supercapacitors with high specific capacitance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jiemin Wang, Dan Liu, Quanxiang Li, Cheng Chen, Zhiqiang Chen, Minoo Naebe, Pingan Song, David Portehault, Christopher J. Garvey, Dmitri Golberg, Weiwei Lei
Summary: The study introduces a novel nanocomposite membrane with efficient heat dissipation and waste heat conversion capabilities for operation in high-temperature environments. The membrane demonstrates superior thermal conductivity, allowing for cooling of electronic devices and effective conversion of waste heat into electric power, resulting in significant energy savings.
JOURNAL OF MATERIOMICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Simon Delacroix, Fernando Igoa, Yang Song, Yann Le Godec, Cristina Coelho-Diogo, Christel Gervais, Gwenaelle Rousse, David Portehault
Summary: Boron-rich nanoparticles with unique crystal structures and properties were synthesized using liquid-phase synthesis in molten salts, shedding light on their composition deviation and novel structural building units. This study demonstrates the potential of nanoparticles in hosting wide solid solution ranges and forming new nanostructured materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Guillaume Gouget, Damien Bregiroux, Remi Grosjean, David Montero, Stefan Maier, Franck Gascoin, Clement Sanchez, David Portehault
Summary: The study demonstrates the synthesis of nanocomposites with controlled nanostructure through one-pot liquid-phase synthesis, which can be densified while preserving the nanostructure by spark plasma sintering. These materials exhibit metallic electrical conductivity related to HfB2 nanocrystals and enhanced thermal dissipation attributed to the nanostructured amorphous boron matrix.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Masashi Yatomi, Masakazu Koike, Nadege Rey, Yuki Murakami, Shohei Saito, Hiroaki Wada, Atsushi Shimojima, David Portehault, Sophie Carenco, Clement Sanchez, Carole Carcel, Michel Wong Chi Man, Kazuyuki Kuroda
Summary: In this study, interlayer silylation of Na-Oct with various organoalkoxysilanes was conducted using C(16)TMA-Oct as an intermediate, with or without TBAF. The addition of TBAF increased the degree of silylation, possibly due to nucleophilic attack by F- ions. MPTES exhibited higher reactivity in silylation reactions, indicating better accessibility to the interlayer polar region of C(16)TMA-Oct.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Binghua Ma, Isabel Gomez-Recio, Leo Mazerolles, Pierre-Emmanuel Mazeran, Clement Sanchez, Stephane Delalande, David Portehault
Summary: Incorporating boride nanocrystals can significantly impact the mechanical properties of aluminum alloys. Molten salts synthesis offers opportunities to fabricate superhard boride nanoparticles. HfB2 nanoparticles dispersed in aluminum through molten salt synthesis demonstrate grain boundary strengthening and grain refinement effects.
Article
Chemistry, Physical
Isabel Gomez-Recio, Huiyan Pan, Alberto Azor-Lafarga, Maria Luisa Ruiz-Gonzalez, Maria Hernando, Marina Parras, Maria Teresa Fernandez-Diaz, Juan J. Delgado, Xiaowei Chen, Daniel Goma Jimenez, David Portehault, Clement Sanchez, Mariona Cabero, Arturo Martinez-Arias, Jose M. Gonzalez-Calbet, Jose J. Calvino
Summary: A family of iron-doped manganese-related hollandites, with the most active catalyst able to oxidize more than 50% of CO at room temperature, has been studied in detail. The presence of hydroxyl groups and Mn3+ content were found to play key roles in the catalytic activity of these materials, without the need for any critical noble metal in the catalyst formulation. Detailed structural analysis helped to identify the essential information about the oxidation state of manganese and the stabilizing effects of certain compounds in the hollandite oxide.
Article
Chemistry, Physical
Yang Song, Sandra Casale, Antoine Miche, David Montero, Christel Laberty-Robert, David Portehault
Summary: Metal silicide electrocatalysts for water oxidation were synthesized using silicon nanoparticles and molten salt solvents, resulting in nanocrystals with high electrocatalytic activity and stability exceeding 85 hours. The core-shell-shell nanostructure enables the silicides to exhibit excellent performance for oxygen evolution reaction.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Nanoscience & Nanotechnology
Binghua Ma, Walid Baaziz, Leo Mazerolles, Ovidiu Ersen, Bernard Sahut, Clement Sanchez, Stephane Delalande, David Portehault
Summary: In this study, we have developed a liquid-phase processing technique to design aluminum matrix nanocomposites with phase change nanoparticles. The research demonstrates that the silica shell acts as a barrier, preventing extensive coalescence of particles and broadening the phase change temperature range.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Geoffrey Cotin, Benoit Heinrich, Francis Perton, Celine Kiefer, Gregory Francius, Damien Mertz, Barbara Freis, Benoit Pichon, Jean-Marc Strub, Sarah Cianferani, Nathalie Ortiz Pena, Dris Ihiawakrim, David Portehault, Ovidiu Ersen, Amir Khammari, Matthieu Picher, Florian Banhart, Clement Sanchez, Sylvie Begin-Colin
Summary: Thermal decomposition is an efficient method for synthesizing nanosized metal oxides with controlled structures and properties. In the synthesis of iron oxide nanoparticles, the nucleation mechanism has been found to occur within vesicle-like nanoreactors, providing a new understanding of the synthesis process. This discovery paves the way for better control over the synthesis and properties of metal oxide nanoparticles.
Article
Chemistry, Multidisciplinary
Ram Kumar, Yang Song, Anissa Ghoridi, Philippe Boullay, Gwenaelle Rousse, Christel Gervais, Cristina Coelho Diogo, Houria Kabbour, Capucine Sassoye, Patricia Beaunier, Victor Castaing, Bruno Viana, Maria Luisa Ruiz Gonzalez, Jose Gonzalez Calbet, Christel Laberty-Robert, David Portehault
Summary: This study presents a strategy to design a new polar 3D tetrahedral framework and successfully crystallize the compound at low temperature using a molten salt medium. The resulting structure exhibits high chemical and thermal stability, as well as strong anisotropic hole mobility along the polar axis. The ability to adjust transport properties by doping enables the tuning of water splitting properties for photoelectrocatalytic H-2 evolution and water oxidation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Madeleine Han, Isabel Gomez-Recio, Daniel Gutierrez Martin, Nathaly Ortiz Pena, Maria Luisa Ruiz-Gonzalez, Mohamed Selmane, Jose M. Gonzalez-Calbet, Ovidiu Ersen, Andrea Zitolo, Benedikt Lassalle-Kaiser, David Portehault, Christel Laberty-Robert
Summary: Manganese and cobalt perovskite oxides are highly active electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), respectively. The role of cationic composition and charge state in these perovskites in the mechanism of oxygen electrocatalysis for ORR and OER have been questioned. The results suggest that cationic substitutions and control of cationic vacancies can tune the rate-determining steps of the electrocatalytic cycles.
Article
Chemistry, Physical
Madeleine Han, Isabel Gomez-Recio, Daniel Gutierrez Martin, Nathaly Ortiz Pena, Maria Luisa Ruiz-Gonzalez, Mohamed Selmane, Jose M. Gonzalez-Calbet, Ovidiu Ersen, Andrea Zitolo, Benedikt Lassalle-Kaiser, David Portehault, Christel Laberty-Robert
Summary: Manganese and cobalt perovskite oxides are highly active electrocatalysts for ORR and OER. By synthesizing different perovskite nanoparticles and using X-ray absorption spectroscopy and electron energy loss spectroscopy, we found that the oxidation states of Mn and Co in single B-site perovskites change during electrocatalysis, while they remain unchanged in mixed Mn/Co perovskite. This study highlights the importance of cationic composition and vacancy control in tuning oxygen electrocatalysis.
Article
Chemistry, Multidisciplinary
Nathaly Ortiz Pena, Dris Ihiawakrim, Sorina Cretu, Geoffrey Cotin, Celine Kiefer, Sylvie Begin-Colin, Clement Sanchez, David Portehault, Ovidiu Ersen
Summary: This study investigates the formation process of iron oxide nanoparticles using IL-TEM, and discovers the spontaneous formation of vesicular assemblies made of iron polycation-based precursors sandwiched between stearate layers. By controlling the electron dose, the crystal growth and morphology of the resulting nanoparticles can be controlled. This research sheds new light on the formation process of metal oxide nanoparticles and offers new ways for the synthesis of inorganic colloidal systems with tunable shape and size.
Review
Chemistry, Multidisciplinary
David Portehault, Isabel Gomez-Recio, Marzena A. Baron, Valentina Musumeci, Cyril Aymonier, Virgile Rouchon, Yann Le Godec
Summary: The search for new materials is closely related to the development of synthesis methods. Taking inspiration from natural processes, particularly geological systems, has shown to be a promising approach. This review explores the concept of geoinspiration for the design and synthesis of new materials, highlighting its potential for uncovering novel synthesis pathways and materials.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Song, Isabel Gomez-Recio, Ram Kumar, Cristina Coelho Diogo, Sandra Casale, Isabelle Genois, David Portehault
Summary: This study presents a new method for the production of Na4Si4 using the reaction of silicon nanoparticles with sodium hydride, achieving high purity and efficiency. Na4Si4 is an efficient precursor for the selective synthesis of different types of sodium silicon clathrates.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Yiping Yin, Zhe Wang, Hua Zou
Summary: This study presents a novel method for preparing dimpled polymer-silica nanocomposite particles using interfacial swelling-based seeded polymerization. The optimized conditions allow for a relatively high percentage of dimpled particles to be achieved.
Article
Chemistry, Physical
Brenden D. Hoehn, Elizabeth A. Kellstedt, Marc A. Hillmyer
Summary: Porous materials with nanometer-scale pores have important applications as nanoporous membranes. In this study, ABA triblock copolymers were used as precursors to produce nanoporous polymeric membranes (NPMs) in thin film form by degrading the end blocks. Polycyclooctene (PCOE) NPMs with tunable pore sizes were successfully prepared using solvent casting technique. Oxygen plasma etching was employed to improve the surface porosity and hydrophilicity of the membranes. This study provides a straightforward method to produce tough NPMs with high porosity and hydrophilic surface properties.
Article
Chemistry, Physical
Vladislav S. Petrovskii, Stepan I. Zholudev, Igor I. Potemkin
Summary: This article investigates the behavior of linear and ring polypeptide chains in aqueous solution and explores the properties of the complexes formed by these chains with oppositely charged surfactants. The results demonstrate that the complexes of linear supercharged unfolded polypeptides and the corresponding surfactants exhibit impressive adhesive properties.
Article
Chemistry, Physical
Merve Cevik, Serkan Dikici
Summary: Cardiovascular diseases are a leading cause of death globally, and vascular grafts are a promising treatment option. This study focuses on tissue-engineered vascular grafts (TEVGs) using decellularized parsley stems as a potential biomaterial. The decellularized parsley stems showed suitable properties for TEVGs, providing a suitable environment for human endothelial cells to form a pseudo endothelium. This study showcases the potential of using parsley stems for TEVGs.
Article
Chemistry, Physical
Gustavo A. Vasquez-Montoya, Tadej Emersic, Noe Atzin, Antonio Tavera-Vazquez, Ali Mozaffari, Rui Zhang, Orlando Guzman, Alexey Snezhko, Paul F. Nealey, Juan J. de Pablo
Summary: The optical properties of liquid crystals are typically controlled by electric fields. In this study, we investigate the effects of microfluidic flows and acoustic fields on the molecular orientation and optical response of nematic liquid crystals. We identify several previously unknown structures and explain them through calculations and simulations. These findings hold promise for the development of new systems combining sound, flow, and confinement.
Article
Chemistry, Physical
Xinjun Wu, Xin Guan, Shushu Chen, Jiangpeng Jia, Chongyi Chen, Jiawei Zhang, Chuanzhuang Zhao
Summary: This research presents a novel shape memory hydrogel with a remodelable permanent shape and programmable cold-induced shape recovery behavior. The hydrogel is prepared using specific treatment methods to achieve shape fixation by heating and shape recovery by cooling. Additionally, deformable devices can be obtained by assembling hydrogel blocks with different concentrations.
Article
Chemistry, Physical
Rebecca Hengsbach, Gerhard Fink, Ulrich Simon
Summary: This study examines the properties of DNA functionalized pNipmam microgels and pure pNipmam microgels at different concentrations of sodium chloride and in PBS solutions using temperature dependent H-1-NMR measurements. The results show that DNA modification affects the volume phase transition temperature and the addition of salt and PBS further enhances this effect.
Article
Chemistry, Physical
Ningyi Li, Junhong Li, Lijingting Qing, Shicheng Ma, Yao Li, Baohui Li
Summary: This paper investigates the self-assembly behavior of colloids with competing interactions under spherical confinement and finds that different ordered structures can be formed under different sized spherical confinements. Moreover, more perforated structures are formed in smaller spheres.