Xiaodong Li

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24 Feb 03:32

Biomimetic Anisotropic Reinforcement Architectures by Electrically Assisted Nanocomposite 3D Printing

by Yang Yang, Zeyu Chen, Xuan Song, Zhuofeng Zhang, Jun Zhang, K. Kirk Shung, Qifa Zhou, Yong Chen
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Biomimetic architectures with Bouligand-type carbon nanotubes are fabricated by an electrically assisted 3D-printing method. The enhanced impact resistance is attributed to the energy dissipation by the rotating anisotropic layers. This approach is used to mimic the collagen-fiber alignment in the human meniscus to create a reinforced artificial meniscus with circumferentially and radially aligned carbon nanotubes.

16 Feb 06:21

Tunable Length and Optical Properties of CsPbX3 (X = Cl, Br, I) Nanowires with a Few Unit Cells

by Daniel Amgar, Avigail Stern, Dvir Rotem, Danny Porath and Lioz Etgar

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Nano Letters
DOI: 10.1021/acs.nanolett.6b04381
16 Feb 06:20

Nanostructured Conductive Polymer Gels as a General Framework Material To Improve Electrochemical Performance of Cathode Materials in Li-Ion Batteries

by Ye Shi, Xingyi Zhou, Jun Zhang, Andrea M. Bruck, Andrew C. Bond, Amy C. Marschilok, Kenneth J. Takeuchi, Esther S. Takeuchi and Guihua Yu

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Nano Letters
DOI: 10.1021/acs.nanolett.6b05227
08 Aug 13:12

Copper-Catalyzed Carbonylative Synthesis of Aliphatic Amides from Alkanes and Primary Amines via C(sp3)–H Bond Activation

by Yahui Li, Fengxiang Zhu, Zechao Wang and Xiao-Feng Wu

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ACS Catalysis
DOI: 10.1021/acscatal.6b01413
08 Apr 03:11

Charge-Convertible Carbon Dots for Imaging-Guided Drug Delivery with Enhanced in Vivo Cancer Therapeutic Efficiency

by Tao Feng, Xiangzhao Ai, Guanghui An, Piaoping Yang and Yanli Zhao

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ACS Nano
DOI: 10.1021/acsnano.6b00043
12 Feb 15:39

Highly sensitive, wearable and wireless pressure sensor using free-standing ZnO nanoneedle/PVDF hybrid thin film for heart rate monitoring

Publication date: April 2016
Source:Nano Energy, Volume 22
Author(s): Keun-Young Shin, James S. Lee, Jyongsik Jang
Highly sensitive, wearable and wireless pressure sensor was successfully fabricated based on the zinc oxide (ZnO) nanoneedle/poly(vinylidene difluoride) (PVDF) hybrid film. The nanoneedle structure of ZnO with large aspect ratio and hexagonal vertical grown pyramid form could lower the elastic modulus of the hybrid film compared to the ZnO nanorod. Due to its high permittivity, low polarization response time and outstanding durability, the hybrid film can be applied for a real-time pressure sensor to monitor the heart rate. Notably, the lowest detectable pressure of the hybrid film was as small as 4Pa. Furthermore, the reduced graphene oxide (rGO) electrode-based Bluetooth antenna attained high peak gain (2.70dBi) and radiation efficiency (78.38%), which was applicable to be used as an omnidirectional antenna to transmit wireless signal to the smart phone. Interestingly, the received wireless heart beat signal within a distance of 8m was more sensitively measured on the radial artery than carotid artery without distortion and time delay, and it had a similar oscillation in comparison with the wire pressure sensor. This approach offers a valuable and promising tool for producing the commercial and continuous wireless pressure sensor for use in routine biomedical research and critical healthcare.

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31 Oct 05:17

Band Gap Dependence on Cation Disorder in ZnSnN2 Solar Absorber

by Tim D. Veal, Nathaniel Feldberg, Nicholas F. Quackenbush, Wojciech M. Linhart, David O. Scanlon, Louis F. J. Piper, Steven M. Durbin
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The band gap of earth-abundant ZnSnN2 can be tuned between 1 and 2 eV by varying the growth conditions and resulting cation disorder. The optical absorption edges and carrier densities fall between model curves for cation-ordered orthorhombic and disordered wurtzite ZnSnN2. Hard X-ray photo­emission spectra suggest different degrees of cation disorder from comparison with hybrid DFT-calculated densities of states.

23 Jul 13:04

p-Type Transparent Conducting Oxide/n-Type Semiconductor Heterojunctions for Efficient and Stable Solar Water Oxidation

by Le Chen, Jinhui Yang, Shannon Klaus, Lyman J. Lee, Rachel Woods-Robinson, Jie Ma, Yanwei Lum, Jason K. Cooper, Francesca M. Toma, Lin-Wang Wang, Ian D. Sharp, Alexis T. Bell and Joel W. Ager

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Journal of the American Chemical Society
DOI: 10.1021/jacs.5b03536
27 Jun 03:45

Enhanced Surface Reaction Kinetics and Charge Separation of p–n Heterojunction Co3O4/BiVO4 Photoanodes

by Xiaoxia Chang, Tuo Wang, Peng Zhang, Jijie Zhang, Ang Li and Jinlong Gong

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Journal of the American Chemical Society
DOI: 10.1021/jacs.5b04186
20 Jun 02:13

Direct Power Generation from a Graphene Oxide Film under Moisture

by Fei Zhao, Huhu Cheng, Zhipan Zhang, Lan Jiang, Liangti Qu
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An efficient moisture–electric-energy transformation is discovered by means of establishing an oxygen functional group gradient in a graphene oxide film. The moisture variation serves as an energy source to generate electric power with an energy-conversion efficiency of up to ≈62%. Based on this finding, a prototype power generator and a self-powered respiratory monitor are demonstrated under the stimulus of the human breath.

16 Jun 00:11

Simple and Efficient System for Combined Solar Energy Harvesting and Reversible Hydrogen Storage

by Lu Li, Xiaoyue Mu, Wenbo Liu, Zetian Mi and Chao-Jun Li

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Journal of the American Chemical Society
DOI: 10.1021/jacs.5b03505