文献类型：期刊文献

英文题名：In situ wet-cell TEM observation of gold nanoparticle motion in an aqueous solution

作者：Chen, Xin[1,2,3];Wen, Jianguo[4,5]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA;[4]Argonne Natl Lab, Electron Microscopy Ctr, Argonne, IL 60439 USA;[5]Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

年份：2012

卷号：7

起止页码：1

外文期刊名：NANOSCALE RESEARCH LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000311677700001)】；

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 US Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471. The authors thank SJ Dillon, JM Zuo, CH Lei, W Swiech, and B Sankaran for the kind support, and Dr. L Martin for the valuable discussions. The support from Shanghai Leading Academic Discipline Project (B502), Shanghai Key Laboratory Project (08DZ2230500), and Science and Technology Commission of Shanghai Municipality Project (11nm0507000) is highly acknowledged. The research was partially accomplished at the Electron Microscopy Center at Argonne National Laboratory, a US Department of Energy Office of Science Laboratory operated under contract no. DE-AC02-06CH11357 by UChicago Argonne, LLC.

语种：英文

外文关键词：In situ transmission electron microscopy; Gold; Nanoparticles; Wet cell

摘要：In situ wet-cell transmission electron microscopy (TEM) technology enables direct observation of nanomaterials in a fully hydrated environment with high spatial and temporal resolution, which can be used to address a wide range of scientific problems. In this paper, the motions of approximately 5-nm sized gold nanoparticles in an aqueous solution are studied using the wet-cell TEM technology. It is observed that gold nanoparticles can be either in a single particle or cluster forms, and dynamic displacement and rotation motions are observed for both forms in the solution. Under electron beam irradiation, nanoparticles in some clusters gradually fused together; sometimes they also showed dramatic growth behavior. Mechanisms for the motion and growth of the particles/clusters are discussed.