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160 results on '"Yin, Peng-gang"'

3. Operando Spectroscopy Observation of Mo Clusters‐Ti3C2TX Catalyst/Support Interface's Dynamic Evolution in Hydrogen Evolution Reaction

Author

Wu, Peng Fei, primary, Yang, Yu Qi, additional, Xi1, Hong Yan, additional, Si, Yang, additional, Chu, Yong Heng, additional, Su, Xiao Zhi, additional, Yan, Wen Sheng, additional, You, Ting Ting, additional, Gao, Yu Kun, additional, Wang, Yu, additional, Chen, Wen Xing, additional, Huang, Yu Ying, additional, and Yin, Peng Gang, additional

Published
2023
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7. Kinetic study for hopping conduction through DNA molecules

Author

Yang, Yong-Gang, Yin, Peng-Gang, and Yan, Xin-Qi Li anf YiJing

Subjects
Condensed Matter - Soft Condensed Matter
Abstract

Recent experiments indicated that disorder effect in DNA may lead to a transition of the charge transport mechanism from band resonant tunnelling to thermal activated hopping. In this letter, based on Mott's variable-range hopping theory we present a kinetic study for the charge transport properties of DNA molecules. Beyond the conventional argument in large-scale systems, our numerical study for finite-size DNA molecules reveals a number of unique features for (i) the I-V characteristics, (ii) the temperature and length dependence, and (iii) the transition from conducting to insulating behaviors., Comment: 3 pages, 3 figures, submitted to Appl. Phys. Lett

Published
2004
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18. A One‐Step Ionic Liquid Interface‐to‐Bulk Modification for Stable Carbon‐Based CsPbI3 Perovskite Solar Cells with Efficiency Over 15%.

Author

Yin, Ran, Wang, Ke‐Xiang, Huo, Xiao‐Nan, Sun, Yan‐Sheng, Sun, Wei‐Wei, Gao, Yu‐Kun, You, Ting‐Ting, and Yin, Peng‐Gang

Subjects
SOLAR cell efficiency, IONIC liquids, PEROVSKITE, SOLAR cells, HETEROGENOUS nucleation
Abstract

Hole transport layer‐free, carbon‐based, all‐inorganic CsPbI3 perovskite solar cells (PSCs) have exhibited great potential in photovoltaic applications owing to their low cost and excellent thermal stability. However, the low power conversion efficiency (PCE) hampers its development, mainly due to the existence of defects inside the CsPbI3 film or at TiO2 electron transport layer/CsPbI3 interface. Herein, these issues were addressed through a facile TiO2 post‐treatment strategy using 1‐butyl‐3‐methylimidazole hexafluorophosphate (BMIMPF6) ionic liquid. First, BMIMPF6 can passivate TiO2/CsPbI3 interface defects by forming strong bond between the electron‐rich N atoms and uncoordinated ions. Second, BMIMPF6‐modified TiO2 shows reduced hydrophilicity, inducing decreased heterogeneous nucleation and is favorable for obtaining high‐quality CsPbI3 film. Thirdly, the non‐volatile BMIMPF6 can diffuse to the perovskite film surface during annealing, further passivating defects located at perovskite grain boundaries and surface. Based on this one‐step ionic liquid interface‐to‐bulk modification, the modified device achieves a champion PCE of 15.09%, which is 14% higher than the control device (13.27%). In addition, the modified device also shows enhanced long‐term stability, which remains 96% of initial PCE after 30 days storage in dry air. The work demonstrates the superiority of multifunctional ionic liquid applied to all‐inorganic carbon‐based PSCs, providing a guidance for its commercialization. [ABSTRACT FROM AUTHOR]

Published
2022
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36. Synthesis and Raman Property of Porous Jujube-Like Cu2O Hierarchy Structure

Author

Yin Peng-Gang, Guo Lin, and Sun Du

Subjects
Dodecylbenzene, business.industry, Nanotechnology, Crystal, symbols.namesake, chemistry.chemical_compound, Semiconductor, Chemical engineering, chemistry, Nanocrystal, Transmission electron microscopy, symbols, Particle, Physical and Theoretical Chemistry, Raman spectroscopy, business, Porosity
Abstract

Structural engineering of nanocrystals is of great importance to control the properties of semiconductor oxides. Here, we present a mild wet chemical reduction route to obtain a sub-micron porous jujube-like Cu2O hierarchy structure. Sodium dodecylbenzene sulfonate (SDBS) is crucial in structural regulation and it acts as a soft template and a capping agent. The jujube-like particle consists of crystal grains less than 10 nm in size as verified by transmission electron microscopy (TEM) and X-ray diffraction (XRD). A set of time control experiments were carried out to study the evolution of the jujube-like structure. Interestingly, we found that altering the amount of added HCl resulted in a size-tuning effect of changing the size of the particles from approximately 300 to 900 nm. Based on these results, we propose a possible growth-etching competition mechanism to explain the formation of the hollow interior and its porous nature, which also agrees with the sizing-tuning effect. The optical properties were analyzed using Raman spectroscopy. By comparison with a conventional sub-micron solid polyhedral we found a novel Raman property for the porous jujube-like Cu2O. Our research complements the library of Cu2O Raman spectra, which is meaningful for the nondestructive examination of pigments on the surface of antiques by Raman techniques. 1543 Acta Phys. ⁃Chim. Sin. 2011 Vol.27

Published
2011

45. Three‐dimensional MoS2‐NS@Au‐NPs hybrids as SERS sensor for quantitative and ultrasensitive detection of melamine in milk.

Author

Liang, Xiu, Zhang, Xiao‐Juan, You, Ting‐Ting, Yang, Nan, Wang, Guang‐Sheng, and Yin, Peng‐Gang

Subjects
GOLD nanoparticles, SERS spectroscopy, MELAMINE, MILK analysis, MOLYBDENUM disulfide
Abstract

Abstract: MoS2, a novel inorganic graphene analogues with typical two‐dimensional structure, has attracted increasing interest in various fields. MoS2‐based hybrid plasmonic structures have been extensively investigated as higher quality surface enhanced Raman scattering (SERS) substrates. Herein, we have designed a three‐dimensional (3D) MoS2 nanospheres (NSs) based hybrid nanostructure as SERS sensor by decorating Au nanoparticles (NPs) on the surface of 3D MoS2‐NSs (3D MoS2‐NS@Au‐NPs). 3D MoS2‐NSs acts as (a) a stable scaffold for Au NPs decoration via microwave‐irradiation hydrothermal process, (b) a chemical mechanism source for Raman enhancement, and (c) a 3D spatial structure for generation of more effective hot spots due to Au coupling effect and supply larger surface area for adsorbing probe molecules. The 3D MoS2‐NS@Au‐NPs hybrid structure exhibits 56‐fold improvement on enhancement factor compared to two‐dimensional MoS2‐NST@Au‐NPs hybrid structures. SERS performance was easily and effectively optimized with the tuning of the density and sizes of Au NPs. The optimized 3D MoS2‐NS@Au‐NPs was applied as SERS sensor for melamine detection in milk. Quantitative detection was realized in the range of 1 ppb–10 ppm with a linear coefficient of .997. Excellent sensitivity of 1 ppb and uniformity of 10.12% relative standard deviation was achieved, which could meet the demand for melamine detection as prescribed by the U.S. Food and Drug Administration. [ABSTRACT FROM AUTHOR]

Published
2018
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