Skliri, Euaggelia; Miao, Jianwei; Xie, Jian; Liu, Guangfeng; Salim, Teddy; Liu, Bin; Zhang, Qichun; Armatas, Gerasimos S.
Assembly and photochemical properties of mesoporous networks of spinel ferrite nanoparticles for environmental photocatalytic remediation
Spinel ferrite materials have an electronic band structure that is well suited for visible light-induced catalysis, however, their photocatalytic activity remains low due to the daunting charge-carrier separation process. In this article, we report that high-surface-area mesoscopic architectures composed of tightly connected ultrasmall spinel ferrite nanocrystals can efficiently suppress…
Asynchronous fracture of hierarchical microstructures in hard domain of thermoplastic polyurethane elastomer: Effect of chain extender
Guo, Yaqian; Zhang, Ruoyu; Xiao, Qiang; Guo, Hongxia; Wang, Zongbao; Li, Xing; Chen, Jing; Zhu, Jin
Four chain extenders, 1,3-propanediol (PDO), 2-methyl-1,3-propanediol (MPO), 2,2-dimethyl-1,3-propanediol (NPG) and 2,2,4,4-tetramethyl-1,3-cyclobutanedio (CBDO) are chosen to synthesize model polyurethanes, respectively. Although with similar oxygen distance between the two hydroxyl groups, their volumes increase gradually according to computer simulation. As expected, the degree of microphase…
Cavitation in Poly(4-methyl-1-pentene) during Tensile Deformation
Chen, Ran; Lu, Ying; Jiang, Zhiyong; Men, Yongfeng
The poly(4-methyl-1-pentene) sample was used to investigate the cavitation-induced stress-whitening phenomenon during stretching at different temperatures via the ultrasmall-angle X-ray scattering technique. Two modes of cavitation were found that mode I cavitation activated around yield point followed by mode II cavitation generated in highly oriented state. The critical strain for…
Characterization of ketoprofen-loaded PEG-CH semi-IPN system for wound dressing application
Gaitán‐Tolosa, Ibeth M.; Montiel‐Campos, Raúl; Flores‐Estrada, Jaime; Domínguez‐García, Ma Victoria; Flores‐Merino, Miriam V.
Polymer systems, in the form of crosslinking networks, have been widely used in biomedicine. However, they are a challenge mainly due to the impact of their physicochemical properties on release kinetics of drugs. Ketoprofen is an analgesic anti-inflammatory drug with short half-life (
Chirality inversion, supramolecular hydrogelation and lectin binding of two thiolactose amphiphiles constructed on a di-lauroyl-L-tartaric acid scaffold
Cano, María Emilia; Chenna, Pablo Héctor Di; Lesur, David; Wolosiuk, Alejandro; Kovensky, José; Uhrig, María Laura
Herein we report the synthesis, characterization and self-assembly properties of two new thiolactose based amphiphiles constructed on a di-lauroyl-L-tartaric acid scaffold that only differ in the length of the spacer by an ethylene glycol unit. Upon dissolution in hot water the amphiphiles give rise to different colloidal systems at 25…
Compatibilization of multicomponent composites through a transitioning phase: Interfacial tensions considerations
Koh, J. Justin; Zhang, Xiwen; Kong, Junhua; He, Chaobin
A novel interfacial compatibilization technique for incompatible polymer blends or composites is proposed, in which a transitioning layer was introduced between the matrix and the dispersed phase of the otherwise incompatible components. The transitioning phase should have good interactions with both the components, resulting in lower interfacial energy between the…
Configuration of the magnetosome chain: a natural magnetic nanoarchitecture
Orue, I.; Marcano, L.; Bender, P.; García-Prieto, A.; Valencia, S.; A. Mawass, M.; Gil-Cartón, D.; Venero, D. Alba; Honecker, D.; García-Arribas, A.; Barquín, L. Fernández; Muela, A.; L. Fdez-Gubieda, M.
Nanoscale, 2018, vol 10, 16, pp. 7407-7419DOI:10.1039/C7NR08493EVisit the full articleBack to the overview
Creating cross-linked lamellar block copolymer supporting layers for biomimetic membranes
Lang, Chao; Shen, Yue-xiao; LaNasa, Jacob A.; Ye, Dan; Song, Woochul; Zimudzi, Tawanda J.; Hickner, Michael A.; Gomez, Enrique D.; Gomez, Esther W.; Kumar, Manish; Hickey, Robert J.
The long-standing goal in membrane development is creating materials with superior transport properties, including both high flux and high selectivity. These properties are common in biological membranes, and thus mimicking nature is a promising strategy towards improved membrane design. In previous studies, we have shown that artificial water channels can…
Covalently bonded multimers of Au25(SBut)18 as a conjugated system
Sels, Annelies; Salassa, Giovanni; Cousin, Fabrice; Lee, Lay-Theng; Bürgi, Thomas
Aromatic dithiol linkers were used to prepare aggregates of Au25(SR)18 clusters (SR: thiolate) via ligand exchange reactions. Fractions of different aggregate sizes were separated by size exclusion chromatography (SEC). The aggregates were characterized by UV-vis absorption spectroscopy, matrix assisted laser desorption ionization (MALDI) mass spectrometry, nuclear magnetic resonance (NMR)…
Determination of the packing model of a supramolecular nanofiber via mass-per-length measurement and de novo simulation
Yao, Qingxin; Bao, Qiang; Li, Xinming; Wang, Hui; Yang, Zhenyu; Shi, Xinghua; Gao, Yuan; Xu, Bing
Herein, we report an example of using scanning transmission electron microscopy to determine the mass-per-length of supramolecular nanofibers. Together with the measurement of the diameter of nanofibers via transmission electron microscopy, we could estimate the packing density of assembling molecules along the nanofibers. A parallel unbiased de novo simulation screens…