发光学报2007，Vol.28Issue(1)：93-98,6.
采用紫外光照法在磷酸盐玻璃中合成CdS/Ag复合微粒
Synthesis of CdS/Ag Particles in Phosphate Glass by UV Beam Irradiation
摘要
Abstract
Glasses doped with nanosized Ⅱ-Ⅵ semiconductor particles such as CdS or metals like Ag have attracted much attention because of their large non-linear optical properties. Meanwhile, semiconductor/metal hybrid particles have also been suggested as a scheme to provide substantial further enhancement of both the optical non-linear and the figure of merit(χ3/absorption).Glasses doped with large number of silver particles (～1% additional in mass fraction) were prepared by a glass precipitation method and heat-treatment process after UV irradiation.Their structure was studied by X-ray diffraction (XRD) and high-resolution scan electron microscopy (HRSEM). Optical properties were researched by absorption spectra and PL spectra.HRSEM pictures of CdS/Ag clearly indicated that all crystallites are uniformly distributed in the glass matrix with 1 μm in radius and consist of clusters of small particles with size of 0.5 μm. The XRD results showed that samples with UV irradiation and thermal treatment exhibit diffraction peaks of silver and CdS, samples with thermal treatment only exhibit peaks of CdS particles, while samples without thermal treatment were nearly amorphous type.The absorption spectra of CdS/Ag particles show a typical surface plasmon resonance feature at 420 nm and a peak at 600 nm which was attributed to the CdS, while samples with CdS particles only exhibit a peak at around 480 nm, and samples without thermal treatment have a peak at 320 nm which may be caused by slight crystallization of the CdS nanocrystallites during quenching. The PL peak of the glasses doped with CdS consists of three peaks. However, in CdS/Ag doped glass, the CdS PL peak was vanished. In order to explain this phenomenon, a resonant energy transfer mechanism was proposed.The formation mechanism of Ag particles by UV irradiation was discussed. The results indicated that the electron on the semiconductor surface can reduce silver ions upon the irradiation of the glass and lead to formation of silver particles, accompanying with the capture of the holes by the surface defects.关键词
紫外光照/CdS/Ag/光学性能Key words
UV irradiation/CdS/Ag/optical properties分类
数理科学引用本文复制引用
余凤斌,陈福义,介万奇,王涛..采用紫外光照法在磷酸盐玻璃中合成CdS/Ag复合微粒[J].发光学报,2007,28(1):93-98,6.基金项目
国家自然科学基金(50671082) （50671082）
航空科学基金(2005ZG530038) （2005ZG530038）
西北工业大学研究生创业种子基金(Z200519)资助项目Project supported by National Natural Science Foundation of China(50671082) （Z200519）
Aeronautic Science Foundation of China (2005ZG530038) （2005ZG530038）
Graduate Starting Seed Fund of Northwestern Polytechnical University (Z200519) （Z200519）
