Lange, Tobias; Charpentier, Thibault; Gobeaux, Frédéric; Charton, Sophie; Testard, Fabienne; Thill, Antoine
Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material
The phosphonic acid moiety is commonly used as an anchoring group for the surface modification of imogolite. However, the impact of the reaction on its structure has never been clearly analyzed before. We study the reaction of imogolite and decylphosphonic acid by combining infrared spectroscopy, X-ray scattering, scanning electron microscopy,…
3D visualisation of hepatitis B vaccine in the oral delivery vehicle SBA-15
Rasmussen, Martin K.; Kardjilov, Nikolay; Oliveira, Cristiano L. P.; Watts, Benjamin; Villanova, Julie; Botosso, Viviane Fongaro; Sant’Anna, Osvaldo A.; Fantini, Marcia C. A.; Bordallo, Heloisa N.
Developing a technology that enables oral vaccines to work efficiently remains a considerable effort since a number of difficulties must be addressed. The key objective being to ensure the safe passage through the harsh conditions within the gastrointestinal tract, promoting delivery that induces enhanced immune response. In the particular case…
Simultaneous SAXS-WAXS Experiments on Semi-Crystalline Polymers: Example of PA11 and Its Brill Transition
Tencé-Girault, Sylvie; Lebreton, Sylvie; Bunau, Oana; Dang, Patrick; Bargain, François
This manuscript of the special issue “Microstructural Evolution and Mechanical Behavior of Semi-Crystalline Polymers” aims to show that Small Angle X-ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS) experiments performed simultaneously constitute a unique tool to obtain valuable information on the hierarchical structure of semi-crystalline polymers. These structural quantitative…
Formation and evolution of shish-kebab structure during hot stretching in gel-spun ultra-high molecular weight polyethylene fibers with high concentration gel solution
An, Minfang; Lv, You; Xu, Haojun; Li, Yiguo; Wang, Zongbao
Formation and evolution of shish‐kebab crystals of gel‐spun ultra‐high molecular weight polyethylene fibers from high concentration gel solution during hot‐stretching process were studied by in situ small‐angle X‐ray scattering and wide‐angle X‐ray diffraction measurements, differential scanning calorimetry, and scanning electron microscopy. We show that the structural evolution process can be…
Effect of solvent-matrix interactions on structures and mechanical properties of micelle-crosslinked gels
Xu, Dan; Xu, Ting; Gao, Guorong; Xiao, Ying; Wang, Zongbao; Chen, Jing; Zhou, Yang; Wang, Rong; Yin, Jingbo; Fu, Jun
Previous studies on hydrogels crosslinked by acrylated PEO99–PPO65–PEO99 triblock copolymer (F127DA) micelles demonstrate outstanding strength and toughness, which is attributed to the efficient energy dissipation through the hydrophobic association in the micelles. The current study further focuses on how the solvent property affects the structures and the mechanical properties of…
Improved thermal conductivity of thermoplastic polyurethane via aligned boron nitride platelets assisted by 3D printing
Liu, Junchao; Li, Weiwei; Guo, Yufeng; Zhang, Hui; Zhang, Zhong
Thermal management is of importance to microelectronics. Owning both excellent thermal conduction and electrical insulation, hexagonal boron nitride (hBN) platelets are widely used in polymer matrices. While the thermal properties rely on the orientation of hBN platelets in polymer matrices significantly. Herein, we report that high thermal conductive hBN filled…
Residual Silver Remarkably Enhances Electrocatalytic Activity and Durability of Dealloyed Gold Nanosponge Particles
Li, Guangfang Grace; Lin, Ye; Wang, Hui
Percolation dealloying of multimetallic alloys entangles the selective dissolution of the less-noble elements with nanoscale restructuring of the more-noble components, resulting in the formation of spongelike, nanoporous architectures with a unique set of structural characteristics highly desirable for heterogeneous catalysis. Although the dealloyed nanoporous materials are compositionally…
Cavitation-enabled rapid and tunable evolution of high-χN micelles as templates for ordered mesoporous oxides
Lokupitiya, Hasala N.; Stefik, Morgan
The kinetic-entrapment of block copolymer micelles enables size-persistence, however tuning micelle sizes under such conditions remains challenging. Agitation-induced chain exchange via vortexing is limited by the production of solution–air interfaces. Here, we use ultrasonic cavitation for rapid interface production that accelerates micelle growth by an order of magnitude over…
Multifaceted Gold–Palladium Bimetallic Nanorods and Their Geometric, Compositional, and Catalytic Tunabilities
Sun, Lichao; Zhang, Qingfeng; Li, Guangfang Grace; Villarreal, Esteban; Fu, Xiaoqi; Wang, Hui
Kinetically controlled, seed-mediated co-reduction provides a robust and versatile synthetic approach to multimetallic nanoparticles with precisely controlled geometries and compositions. Here, we demonstrate that single-crystalline cylindrical Au nanorods selectively transform into a series of structurally distinct Au@Au–Pd alloy core–shell bimetallic nanorods with exotic multifaceted geometries…
Overcoming the Interfacial Lattice Mismatch: Geometry Control of Gold–Nickel Bimetallic Heteronanostructures
Li, Guangfang Grace; Blom, Douglas A.; Pandey, Shubham; Koch, Robert J.; Misture, Scott T.; Phillpot, Simon R.; Wang, Hui
Seed-mediated heteroepitaxial growth provides a versatile synthetic approach to a diverse set of geometrically distinct bimetallic heteronanostructures. In bimetallic nanocrystal systems, interfacial heteroepitaxial growth typically occurs between structurally similar metals with lattice mismatch below 5%, whereas controlled epitaxial growth of bimetallic nanocrystals comprising metals with…