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2,613 results on '"Yang Shanshan"'

102. Chloride-Assisted Corrosion of Copper and Protection by Benzotriazole

Author

Yang, Shanshan, Zhao, Xiao, Qi, Zhiyuan, Lu, Yi-Hsien, Somorjai, Gabor, Yang, Peidong, Baskin, Artem, Prendergast, David, and Salmeron, Miquel

Subjects
copper corrosion, benzotriazole, NaCl, cyclic voltammetry, sum-frequency vibrational spectroscopy, solid/liquid interface, Chemical Sciences, Engineering, Nanoscience & Nanotechnology
Abstract

The structure and composition of copper surfaces in aqueous solutions of benzotriazole (BTAH) and NaCl was investigated by sum frequency vibrational spectroscopy as a function of concentration and bias during cyclic voltammetry experiments. We found that the protection provided by the BTAH films formed at the copper surface is effective for negative bias voltages below the open circuit potential (OCP) but not at positive voltages where Cl- displaces BTAH. By measuring the Gibbs adsorption energy of BTAH and Cl-, we found that a particularly stable Cl- structure is formed around the OCP, suggesting that electronegative additives that move the OCP to higher negative values can improve BTAH protection, which we confirmed by the addition of a negatively charged sodium dodecyl sulfate surfactant. more...

Published
2022

111. Photoinduced Charge Transfer and Trapping on Single Gold Metal Nanoparticles on TiO2

Author

Luna, Monica, Barawi, Mariam, Gómez-Moñivas, Sacha, Colchero, Jaime, Rodríguez-Peña, Micaela, Yang, Shanshan, Zhao, Xiao, Lu, Yi-Hsien, Chintala, Ravi, Reñones, Patricia, Altoe, Virginia, Martínez, Lidia, Huttel, Yves, Kawasaki, Seiji, Weber-Bargioni, Alexander, de la Peña ÓShea, Victor A, Yang, Peidong, Ashby, Paul D, and Salmeron, Miquel more...

Subjects
Engineering, Chemical Sciences, Physical Chemistry, Nanotechnology, charge transfer, photovoltage, Kelvin probe force microscopy, atomic force microscopy, TiO2, metal nanoparticles, photoelectrocatalysis, Nanoscience & Nanotechnology, Chemical sciences, Physical sciences
Abstract

We present a study of the effect of gold nanoparticles (Au NPs) on TiO2 on charge generation and trapping during illumination with photons of energy larger than the substrate band gap. We used a novel characterization technique, photoassisted Kelvin probe force microscopy, to study the process at the single Au NP level. We found that the photoinduced electron transfer from TiO2 to the Au NP increases logarithmically with light intensity due to the combined contribution of electron-hole pair generation in the space charge region in the TiO2-air interface and in the metal-semiconductor junction. Our measurements on single particles provide direct evidence for electron trapping that hinders electron-hole recombination, a key factor in the enhancement of photo(electro)catalytic activity. more...

Published
2021

122. 'Teaching, My Passion; Publishing, My Pain': Unpacking Academics' Professional Identity Tensions through the Lens of Emotional Resilience

Author

Yang, Shanshan, Shu, Dingfang, and Yin, Hongbiao

Abstract

In the global competition of higher education, an increasing emphasis has been placed on university research excellence. Accordingly, academics have to engage in both research and teaching activities. The multiple and fragmented identities of academics can sometimes be contested, leading to identity tensions, and impeding their professional development. This raises the issue of how, and whether at all, academics integrate their professional identities in a culture of performativity. Against this backdrop, this qualitative study explored how a specific group of Chinese academics negotiate identity tensions as teachers and researchers through an emotional resilience lens. The narrative frames and interviews with 10 college English teachers yielded four types of identity negotiation in the continuum from identity conflicts to identity integration mediated by emotional resilience, including the disheartened performer, the miserable follower, the strenuous accommodator, and the fulfilled integrator. Emotional resilience as a mediator in professional identity tensions is discussed. Our findings offer a nuanced understanding of the complexity of academics developing an integrated professional identity. Policymakers should recognize the potential of emotional resilience in integrating academic professional identities and jointly support academics to cope with their identity tensions. However, if identity tensions are too complex for academics to solve, the policymakers should consider tensions as signals that the existing institutional policies may be counterproductive and need to be revised, rather than merely calling on academics' resilience. more...

Published
2022
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140. Baseline C-reactive protein predicts efficacy of the first-line immune checkpoint inhibitors plus chemotherapy in advanced lung squamous cell carcinoma: a retrospective, multicenter study

Author

Zheng, Xinlong, Zhang, Longfeng, Wu, Lin, Zhao, Jun, Sun, Jianguo, Fang, Yong, Zhou, Jin, Chu, Qian, Shen, Yihong, Yang, Zhenzhou, Chen, Lijin, Huang, Meijuan, Lin, Xiaoyan, Liu, Zhenhua, Shen, Peng, Wang, Zhijie, Wang, Xin, Wang, Huijuan, Han, Zhengbo, Liu, Anwen, Zhang, Hongmei, Ye, Feng, Gao, Wen, Wu, Fang, Song, Zhengbo, Chen, Shengchi, Zhou, Chenzhi, Wang, Qian, Xu, Chunwei, Huang, Dingzhi, Zheng, Xiaobin, Miao, Qian, Jiang, Kan, Xu, Yiquan, Wu, Shiwen, Wang, Haibo, Zhang, Qiuyu, Yang, Shanshan, Li, Yujing, Chen, Sihui, and Lin, Gen more...

Published
2023
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