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]

机构：[1] Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; [3] Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States; [4] Electron Microscopy Center and Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, United States

年份：2012

卷号：7

起止页码：1

外文期刊名：Nanoscale Research Letters

收录：EI(收录号：20125115815399)

语种：英文

外文关键词：Cells - High resolution transmission electron microscopy - Fiber optic sensors - Solutions - Cytology - Metal nanoparticles

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. ? 2012 Chen and Wen.