Search

Your search keyword '"Zhao, Tianshou"' showing total 1,752 results
Start Over Author "Zhao, Tianshou"
1,752 results on '"Zhao, Tianshou"'

14. 2D MXenes: Visible Black but Infrared White Materials

Author

Li, Yang, Xiong, Cheng, Huang, He, Peng, Xudong, Mei, Deqing, Li, Meng, Liu, Gongze, Wu, Maochun, Zhao, Tianshou, and Huang, Baoling

Subjects
Condensed Matter - Materials Science, Physics - Applied Physics
Abstract

Black materials with low infrared absorption/emission (or IR white) are rare in nature but highly desired in numerous areas, such as solar-thermal energy harvesting, multispectral camouflage, thermal insulation, and anti-counterfeiting. Due to the lack of spectral selectivity in intrinsic materials, such counter-intuitive properties are generally realized by constructing complicated subwavelength metamaterials with costly nanofabrication techniques. Here we report the low mid-IR emissivity (down to 10%) of 2D Ti3C2Tx MXenes. Associated with a high solar absorptance (up to 90%), they embrace the best spectral selectivity among the reported intrinsic black solar absorbing materials. Their appealing potentials in several aforementioned areas are experimentally demonstrated. First-principles calculations reveal that the IR emissivity of MXenes relies on both the nanoflake orientations and terminal groups, indicating great tunability. The calculations also suggest that more MXenes including Ti2CTx, Nb2CTx, and V2CTx are also potential low-emissivity materials. This work opens the avenue to further exploration of a family of intrinsically low-emissivity materials with over 70 members., Comment: 26 pages, 4 figures, and supporting information

Published
2021

18. Ultrastrong, Ultraflexible, and Ultratransparent Polyethylene Cellular Nanofilms

Author

Gao, Ping, Gu, Qiao, Li, Jin, Li, Runlai, Zhang, Qinghua, Weng, Lu-tao, Zhao, Tianshou, Yu, T. X., Shao, Minhua, and Amine, Khalil

Subjects
Condensed Matter - Materials Science
Abstract

Light weight and mechanically robust cellular polymer nanofilms provide materials solutions to many cutting-edge technologies, such as high-flux membrane filtration, ultrathin flexible energy storage, and skin-conformable devices. However, it remains challenging to fabricate hand manipulatable cellular polymer nanofilms for use as self-standing structural materials. Herein, we used a sequential planar extension approach to transform low-entanglement ultrahigh molecular weight polyethylene (UHMWPE) gel films dispersed in porogenic polyethylene oligomers into cellular nanofilms consisting of stretch-dominated triangular cells of molecularly anisotropic cell edges. The microstructure afforded the cellular nanofilm, which had a thickness down to 20 nm, with a unique combination of ultratransparency (>98.5%), ultrahigh in-plane tensile strength (1071 MPa.cm^3.g^(-1)), and ultrahigh flexibility: a 43 nm thick film can deflect reversibly up to 8.0 mm in depth (185,000 times) under a spherical indentation load. As an application, we fabricated the nanofilm into a freestanding ultratransparent respiratory face covering. The new polyethylene cellular nanofilms are expected to represent a new class of platform membranes for advancing fundamental and technological development.

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results