文献类型：期刊文献

中文题名：A Study of Nano Materials and Their Reactions in Liquid Using in situ Wet Cell TEM Technology

英文题名：A Study of Nano Materials and Their Reactions in Liquid Using in situ Wet Cell TEM Technology

作者：Chen Xin[1,2,3];Zhou Lihui;Wang Ping[4];Zhao Chongjun[1,2];Miao Xiaoli[1,2]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[3]Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA;[4]E China Univ Sci & Technol, Biomed Nanotechnol Ctr, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：30

期号：12

起止页码：2839

中文期刊名：Chinese Journal of Chemistry

外文期刊名：CHINESE JOURNAL OF CHEMISTRY

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000312942500020)】；CSCD:【CSCD2011_2012】；

基金：The TEM experiment was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which are partially supported by the U.S. Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471. The authors thank S. J. Dillon, Y. Liu, K.-W. Noh, A. Shah, T. Shang, J. G. Wen, J. M. Zuo for the kind help. The support from Shanghai Leading Academic Discipline Project (B502), Shanghai Key Laboratory Project (08DZ2230500), and Science and Technology Commission of Shanghai Municipality Project (11nm0507000) and NSFC Fundamental Research Funds for the Central Universities is highly acknowledged.

语种：英文

中文关键词：in situ TEM; nano material; electrochemical reaction; electron beam induced deposition; semiconductor

外文关键词：in situ TEM; nano material; electrochemical reaction; electron beam induced deposition; semiconductor

摘要：Several nano material and reaction systems were in situ monitored with an electrochemical TEM wet cell set up. In a 1 g/L sliver particle aqueous solution, the particles were observed to be ca. 10 nm sized, in both discrete particle and nano cluster forms. The silver particles were attached to the 50 nm-thick Si3N4 windows of the wet cell and could not move freely in the liquid. With a SIC14 liquid loaded in the wet cell, silicon nano materials were controllably grown on the wet cell windows by means of a liquid phase electron beam induced deposition （EBID） method. The deposited nano dots were nicely round-shaped, and demonstrated a power law growth dependency on beam exposure time in a log-log plot. In a NiCI2 solution/Ni system, both electrochemical deposition and dissolution of the nickel nano films were observed while applying electric biases on to the nickel electrodes in the wet cell. Instead of extensional growth on existing crystals, interestingly, it is more commonly observed that new nickel nano particles grow out in front of the existing film first and then merged into the film. The wet cell set up is demonstrated to be a versatile tool for nano liquid system research.
Several nano material and reaction systems were in situ monitored with an electrochemical TEM wet cell set up. In a 1 g/L sliver particle aqueous solution, the particles were observed to be ca. 10 nm sized, in both discrete particle and nano cluster forms. The silver particles were attached to the 50 nm-thick Si3N4 windows of the wet cell and could not move freely in the liquid. With a SiCl4 liquid loaded in the wet cell, silicon nano materials were controllably grown on the wet cell windows by means of a liquid phase electron beam induced deposition (EBID) method. The deposited nano dots were nicely round-shaped, and demonstrated a power law growth dependency on beam exposure time in a log-log plot. In a NiCl2 solution/Ni system, both electrochemical deposition and dissolution of the nickel nano films were observed while applying electric biases on to the nickel electrodes in the wet cell. Instead of extensional growth on existing crystals, interestingly, it is more commonly observed that new nickel nano particles grow out in front of the existing film first and then merged into the film. The wet cell set up is demonstrated to be a versatile tool for nano liquid system research.