Preparation and evaluation of Fe_3O_4-core@Ag-shell nanoeggs for the development of fingerprints

作     者：ZHANG LingYan ZHOU XiaoFeng CHU Ting 

作者机构：College of Criminal Investigation Southwest University of Political Science and Law 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2013年第56卷第5期

页      面：551-556页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：financially supported by the National Natural Science Foundation of China (51102200) the Humanities and Social Sciences of Chinese Education Ministry Foundation (09XJC820016) the Natural Science Foundation Project of Chongqing CSTC (2009BB0135) the Education Committee Foundation of Chongqing City (KJ100105), China Higher Education and Teaching Reform Project of Chongqing City (113127) Graduate Education and Teaching Reform Project of Chongqing City (yjg110304) 

主　　题：Fe3O4 @Ag nanoeggs superparamagnet monodisperse stable latent fingermarks 

摘      要：The surface of individual, relatively dispersed Fe304 nanospheres is coated with a thiol-terminated silane, then the thiol on the Fe304 particles＇ surfaces treats with nano-Ag colloidal solution to form Ag-modified Fe304 nanoparticles. Eventually, a solid shell of Ag is capped onto the Ag-modified Fe304 nanoparticles by reducing aliquots of AgNO3 solution using NaBH4 as a re- ducing agent. The as-prepared Fe304-core@Ag-shell nanoeggs, which are uniform in size, highly monodisperse, stable against aggregation and have high magnetization, were depended on thin shell of the attached nano-Ag, the size of Ee304 nanoparticles, the volume of thiol-terminated silane as well as the ultrasonication. The Fe304-core@Ag-shell nanoeggs are proposed to detect fingermarks on different surface, with which the fingermarks can be viewed directly, due to the clear ridge detail.