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44 results on '"Zou, Mingqiang"'

30. Controllable Self-Assembly of SERS Hotspots in Liquid Environment

Author

Zhang, De, primary, Tang, Lisha, additional, Chen, Jie, additional, Tang, Zhexiang, additional, Liang, Pei, additional, Huang, Youyi, additional, Cao, Minhui, additional, Zou, Mingqiang, additional, Ni, Dejiang, additional, Chen, Jinlei, additional, Yu, Zhi, additional, and Jin, Shangzhong, additional

Published
2021
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37. Enhanced Surface-Enhanced Raman Scattering (SERS) Sensitivity by the Self-Assembly of Silver Nanoparticles (Ag NPs) Laminated on Polydimethylsiloxane (PDMS).

Author

Zhu, Lele, Dai, Hui, Zhang, Shuyun, Hu, Die, Zhou, Qun, Zou, Mingqiang, Adkins, Jason, and Zheng, Junwei

Subjects
SURFACE enhanced Raman effect, SILVER nanoparticles, RAMAN scattering, POLYDIMETHYLSILOXANE, COPPER electrodes, MALACHITE green
Abstract

Herein, a transparent and reproducible substrate, fabricated using polydimethylsiloxane (PDMS) laminated with self-assembled Ag nanoparticles (Ag NPs), was employed as a universal surface-enhanced Raman scattering (SERS) substrate for the detection of targets with various matrices. The Ag NPs were assembled in a two-dimensional manner via a self-assembly technique. Due to the electrostatic interaction between the Ag NPs, the reproducibility of the assembly was ensured by the fixed density of the assembled Ag NPs at saturated assembly states. The assembled pattern and plasmon resonance of the Ag NPs were well preserved during the molding and curing of PDMS. As a result, the Ag NP laminated PDMS film exhibited a SERS effect to the adsorbed p-aminothiophenol comparable to that of the assembled Ag NPs on a glass slide. Extra SERS enhancement was achieved by construction of a Ag (PDMS)/molecule/Ag (glass) configuration due to the electromagnetic coupling between the Ag NPs. The Raman scattering of 4-mercaptobenzoic acid and benzotriazole modified on the surfaces of a smooth Au electrode and copper foil, respectively, was detected with the aid of the Ag NP-laminated PDMS film. Furthermore, malachite green dispersed in a KBr solid matrix was quantitatively determined with a detection limit of 0.5 μg/g. It is suggested that the SERS enhancement and consequential SERS detection sensitivity of the target molecules may be further maximized by adjusting the distance between the target molecules and the Ag NPs laminated on the PDMS film. [ABSTRACT FROM AUTHOR]

Published
2019
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44. Hierarchical VS2Nano-Flowers as Sulfur Host for Lithium Sulfur Battery Cathodes

Author

Wu, Hailin, Huan, Yahuan, Wang, Donghua, Li, Minghua, Cheng, Xiaoqin, Bai, Zhiming, Wu, Pingwei, Peng, Wencai, Zhang, Ruxiao, Ji, Zhen, Zou, Mingqiang, and Yan, Xiaoqin

Abstract

Lithium sulfur batteries (LSB) are considered to be one of the most promising energy storage technologies due to their high energy density, low cost and environmental friendliness. However, there are still many defects such as the shuttle effect of polysulfide, the non-conductivity of sulfur and the large volume change of sulfur cathode leading to cyclic decay and instability. To overcome these challenges, in this study, we synthesized the VS2nano-flowers (NFs) through the hydrothermal method, and then took them as the sulfur host. The VS2NFs possess unique hierarchical structure and excellent electrical conductivity, which can promote Li+and charge transmission, thus improving the reaction kinetics. Besides, the VS2has excellent chemical interaction with polysulfides, which can efficiently suppress the migration of polysulfides and inhibit the shuttle effect. It possessed better cyclic stability compared with the pure sulfur counterparts. Impressively, the lithium sulfur batteries (LSBs) with VS2/S (1:5) cathodes whose specific capacity decay rate over 200 cycles at 0.2 C was ∼0.16% per cycle. It also greatly improved the sulfur utilization and the rate capability of LSBs. The above results demonstrate that the VS2can enhance the cycling performance and has potential application in LSBs.

Published
2019
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