文献类型：期刊文献

英文题名：Real-time imaging of accelerated solid-liquid-gas reactions with nanobubbles

作者：Wang, Wen[1,2]; Xu, Tao[1]; Chen, Jige[3,6]; Shangguan, Junyi[2,5]; Dong, Hui[7]; Ma, Huishu[6]; Zhang, Qiubo[2]; Bai, Tingting[8]; Guo, Zhirui[8]; Fang, Haiping[4]; Zheng, Haimei[2,5]; Sun, Litao[1]

机构：[1] SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Southeast University, Nanjing, 210096, China; [2] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, United States; [3] Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China; [4] Department of Physics, East China University of Science and Technology, Shanghai, 200237, China; [5] Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, United States; [6] Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China; [7] Key Laboratory of Welding Robot and Application Technology of Hunan Province, Engineering Research Center of Complex Tracks Processing Technology, Equipment of Ministry of Education, Xiangtan University, Xiangtan, 411105, China; [8] The Second Affiliated Hospital, Key Laboratory for Aging & Disease, Nanjing Medical University, Nanjing, 210011, China

年份：2020

外文期刊名：Research Square

收录：EI(收录号：20220228401)

语种：英文

外文关键词：Etching - Gold - High resolution transmission electron microscopy - Liquefied gases - Nanorods - Reaction kinetics - Van der Waals forces

摘要：Solid-liquid-gas reactions are ubiquitous. An understanding of how gases influence the reactions at the nanoscale is significant for achieving the enhanced triple-phase reactions. Here, we report a real-time observation of the accelerated etching of gold nanorods with oxygen nanobubbles in aqueous hydrobromic acid using liquid cell transmission electron microscopy (TEM). Our observation reveals that when an oxygen nanobubble is close to a nanorod below the critical distance (~1nm), the local etching rate is significantly enhanced with over an order of magnitude faster. Molecular dynamics simulations results show that the strong attractive van der Waals interaction between the gold nanorod and oxygen molecules facilitates the transport of oxygen through the thin liquid layer to the gold surface and thus plays a crucial role in increasing the etching rate. This result sheds light on the rational design of solid-liquid-gas reactions for enhanced activities. ? 2020, CC BY.