光子相关光谱法测量不同浓度金颗粒粒径的测量时间分析  

Measuring time analysis for Au particle size measurement at different concentration using PCCS

作　　者：李春燕[1] 孔明[1] 赵军[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《激光与红外》2010年第11期1178-1181,共4页Laser & Infrared

摘　　要：研究不同浓度下金颗粒粒径的测量时间。介绍了PCCS法(光子交叉相关光谱法)测量纳米颗粒粒径的基本原理。运用PCCS法测量了不同时间不同浓度下平均粒径为24.5 nm的金颗粒粒径。测量结果表明,相同的测量时间,悬浮液浓度越高,多次测量标准差越小;相同的悬浮液浓度下,测量时间越长,多次测量结果标准差越小。拟合了各个浓度下测量结果标准差与测量时间之间的曲线,利用拟合曲线,可根据需要的测量精度,选择在该浓度下的测量时间。The paper studies the measuring time for Au particle size measurement at different concentration using the method of Photon cross-correlation spectroscopy（PCCS）.The basic principle of measuring the size of nano-particles by PCCS is introduced.We measured gold particles with an average diameter of 24.5 nm at different concentrations with different measuring times by PCCS.The measuring results show that for the same measuring time,the higher the concentration is,the smaller the standard deviation of the measurement is;for the same suspension concentration,the longer the measuring time is,the smaller the standard deviation of the measurement is.Relationship between the standard deviation and the measuring time at difference concentration is obtained.According to the measuring accuracy needed,the measuring time for certain concentration can be is decided by the fitting curve.

关 键 词：光子交叉相关光谱(PCCS) 纳米颗粒 金颗粒 

分 类 号：O433.1[机械工程—光学工程]