摘要
采用硝酸银(AgNO3)为前躯体,抗坏血酸(Vc)为还原剂,通过一条绿色途径合成了Ag纳米粒子,其粒径大小分布范围窄。对产物进行X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外-可见分光光度(UV-Vis)等多种手段进行表征。以吡啶(Py)作为探针分子进行表面增强拉曼散射效应的测定,具有很好的增强效果。结果表明,光谱的检测限为10-10mol·L-1,且随探针分子浓度下降,拉曼信号变化趋势很稳定,为后续定量分析打下基础。
Silver nanoparticles were synthesized by a totally green approach with silver nitrate （AgNO3） as precursor and ascorbic acid （Vc） as reducing agent. The nano-silver particles had narrow particle size distribution. The feature, structure and optical absorption properties of silver nanoparticles were characterized by X-ray diffraction （XRD）, Raman spectra, ultraviolet visible spectrum （UV-Vis）, scanning electron microscope （SEM） and transmission electron microscope （TEM）. Surface-enhanced Raman scattering （SERS） on the prepared nano-silver particles as substrate was investigated by pyridine as the probe molecule. The results show that the detection limit is down to 10^-10mol·L^-1. The variation tendency of Raman signal is stable with the change of the probe molecule concentration, which can be used for the study of the quantitative analysis.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第9期1672-1675,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(20974045)
江苏省自然科学基金(BK2009385)
巢湖学院自然科学基金(XLZ-200902)
