【摘 要】
：
Nanosilver has been applied in many fields including surface-enhanced Raman spectroscopy(SERS),surface enhanced fluorescence(SEF),biomedicine and other area
【机 构】
：
Hubei Key Laboratory of Pollutant Analysis & Reuse Technology,Department of Chemistry,Hubei Normal U
【出 处】
：
第十七届全国化学热力学和热分析学术会议
论文部分内容阅读
Nanosilver has been applied in many fields including surface-enhanced Raman spectroscopy(SERS),surface enhanced fluorescence(SEF),biomedicine and other areas due to the its unique physical and chemical properties.In this paper,nanosilver equipped with uniform dispertion,controllable partical size and morphology was prepared by chemical reduction method in aqueous solutions.This reaction can be carried out at room temperature(298.15K)by taking silver nitrate as the source,sodium borohydride as a reducing agent,sodium citrate tribasic dihydrate and Polyvinylpyrrolidone as protective agents.Furthermore,we focused on the effects of reaction time,temperature,protective agents and so forth on the experimental results.The analysis of UV–vis spectra(Fig.1)showed that the surface plasmon resonance(SPR)absorption peaks of asprepared nanosilver appeared at about 400 nm and 650 nm,which demonstrated the formation of nanosilver corresponding to different morphologies and particle sizes.In addition,sharp and smooth peaks indicated a uniform dispersion.
其他文献
A series of hybrid CoFe PBA(Prussian Blue Analogues)containing six different nitrogen heterocyclic,phen,2,2-bipy,4,4-bipy,phmz,quin and pyz,and correspondin
合成了对水和空气均稳定，阴离子为双三氟甲基磺酸亚胺的疏水型吡啶(5种)及咪唑功能化(2种)离子液体，并考察了上述离子液体的物理化学性质，其中包括密度、粘度、电导率。通过
重稀碱金属铷铯盐有着广泛的应用领域,利用盐-混合溶剂体系分离纯化盐类、开发盐湖取得了良好的效果.本文使用激光动态溶解度测定装置,测定多个温度下甲酰胺(FA)/N-甲基
2007年9月4日,昆明市档案馆“爱国主义教育基地”经过重新装修和改版后正式对外开放。昆明市人民政府王奇英副市长、市政府办公厅厅务委员汪云兰、市教育局姚宏副局长、市档
循环肿瘤细胞(circulating tumor cells,CTCs)作为癌症诊断、预后和疾病监控的重要指示物。外周血中CTCs极度稀少，因此其有效分离非常具有挑战性。当前有两种方法用来分离CTCs
英语要培养学生实际运用语言的能力,就要努力创设情境,让学生学会从学习中体验生活、理解生活,将学习的结果和自己的生活结合起来,真正达到运用语言的目的.笔者以五年级上册
微藻在水生生态系统的碳固定中扮演着重要角色，碳酸酐酶（CA）在微藻CO2浓缩机制中起重要作用。但是，目前对于微藻利用岩溶水体中的无机碳转化为有机碳的稳碳能力以及环境因子和CA
Over the past 10 years,magnetic iron oxide nanoparticles have attracted increasing research interest owing to their applications in biological and biomedica
等温滴定量热法(ITC)是研究分子识别和生物大分子相互作用的重要工具。通过构建ITC 实验曲线的模型和计算机模拟，可以得到相互作用过程的焓、熵、自由能、平衡常数等热力
被称为“绿色溶剂”的离子液体因其独特的物理化学性质在工业和学术领域引起了越来越多的关注[1].然而离子液体在常温下粘度较大，通常是传统分子溶剂的几十甚至几百倍，这给