正电子湮没技术在纳米材料中的应用  

Applications of Positron Annihilation Technology in Nanomaterials

作　　者：曾小川[1] 宋武林[1,2] 周玉华[1] 谢长生[1] 

机构地区：[1]华中科技大学材料科学与工程学院模具技术国家重点实验室,武汉430074 [2]华中科技大学分析测试中心,武汉430074

出　　处：《中国无机分析化学》2011年第2期13-19,共7页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家自然科学基金(项目编号:51071073)资助项目

摘　　要：纳米材料在现实应用中表现出越来越优异的性能,其微结构往往对宏观性能有着重要影响。从正电子湮没技术基本原理出发,结合正电子湮没技术在材料微观结构领域的独特优势,介绍了其在纳米金属、合金以及纳米半导体等材料中的微结构研究工作,阐述了纳米材料微结构对基础学科和实际应用的重要意义。Nanomaterials exhibit more and more excellent performances in real applications.Their microstructures normally determine their macro properties.In this paper,firstly the introduction of positron annihilation technology was given by describing fundamental principles and elucidating characteristic advantages of positron annihilation technology in microstructure analysis of materials.Then the applications of positron annihilation technology in characterization of microstructures of nano-metals,nano-alloys and nano-semiconductor materials were reviewed.The importance of microstructure analysis of nanomaterials by positron annihilation technology for basic scientific disciplines and real applications were also explained.

关 键 词：正电子湮没 纳米材料 微结构 缺陷 

分 类 号：O657[理学—分析化学] TB302.5[理学—化学]