银纳米颗粒的物理可控生长技术  

Controlled Growth of Ag Nanoparticles by Physics Means

作　　者：翟超[1] 唐军[1] 温焕飞[1] 薛晨阳[1] 刘俊[1] 丁宇凯[1] 曹卫达[1] 

机构地区：[1]中北大学,仪器科学与动态测试教育部重点实验室和电子测试技术重点实验室,山西太原030051

出　　处：《仪表技术与传感器》2014年第1期103-106,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(91123016);国家自然科学基金青年科学基金项目(51105345);山西省青年科技研究基金项目(2011021016);山西省留学基金项目(2011068)

摘　　要：目前纳米颗粒的合成方法基本都无法实现纳米颗粒的高纯度可控生长,制约着纳米颗粒的应用发展需求,我们课题组采用全新技术,利用物理合成法——气相凝聚法,通过调节气相凝聚工艺中的工艺参数,制备了粒径可控、密度可控、可重复性的银纳米颗粒,实现了物理方法对纳米颗粒生长的可控制,且该方法简单、有效、可重复操作。接着采用龙胆紫生物大分子作为探针,进一步研究了粒径、密度不同的银纳米颗粒薄膜的表面增强拉曼散射(SERS)和表面增强荧光(SEF)效应,结合理论,验证了该物理方法对纳米颗粒的可控生长,同时进行了纳米颗粒薄膜在生化传感方面的高灵敏检测应用探索。The high purity nanoparticles are barely controlled grown by the current means.It is as the stumbling block in the development processes of nanotechnology.In our experiment,physical vapor phase condensation,as a new way,has been used to control the size and density of nanoparticles in the process of growth.Using this means,the silver nanoparticle has been prepared to be the preconceived size and density with the designing technological parameter.And it has been verified by the AFM and SEM technologies.It is a simple,effective,repeatability method.Meanwhile,the gentian violet biomacromolecule,as the probe,has been absorbed on the different size and density of silver nanoparticles film,and get the phenomena of surface-enhanced Raman scattering and surface-enhanced fluorescence.It not only indicates the nanoparticles are controlled grown by the physics method,but also means the nanoparticels have been applied as the high sensitivity elements in the field of biological and chemical sensing.

关 键 词：物理气相凝聚 可控制备 银纳米颗粒 表面增强拉曼散射 表面增强荧光 生化传感 

分 类 号：O657.37[理学—分析化学]