Absorption and Rayleigh scattering and resonance Rayleigh scattering spectra of [HgX2]n nanoparticles

被引：2
作者：
刘绍璞
刘芹
蒋治良
孔玲
机构：
来源：
Science in China(Series B) | 2002年 / 06期
基金：
中国国家自然科学基金;
关键词：
HgX2]n nanoparticle; absorption spectra; Rayleigh scattering; resonance Rayleigh scattering;
D O I：
暂无
中图分类号：
O657.3 [光化学分析法（光谱分析法）];
学科分类号：
070302 ; 081704 ;
摘要：
The composition and existing species ot the reaction production ot Hg ana X (X= Cl, Br and I) under different conditions, and their absorption, Rayleigh scattering (RS) and resonance Rayleigh scattering (RRS) spectra have been studied. The results show that the products exist in the form of nanoparticles as [HgX2]n aggregates under suitable conditions, and their average diameters increase with the increase of X- diameters. The diameters of [HgCI2]n, [HgBr2]n and [Hgl2]n are less than 4 nm, equal to 9 nm and 70 nm respectively. There are bathchromic shifts gradually with the increase of X- diameters in their absorption spectra. The absorption bands of [HgCI2]n and [HgBr2]n locate at ultraviolet region. However, the absorption band of [Hgl2]n is obvious in visible light region. Among three particles, only [Hgl2]n exhibits a strong RRS and its scattering peak is at 580 nm. The main reasons leading to the enhancement of resonance scattering are the large size of nanoparticle, the formation of the interface
引用
收藏
页码：616 / 624
页数：9
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