%0 Journal Article
%T Preparation and Optical Properties of Nano-PhS/SiO2 Aerogel Assemblies<br>纳米PbS/SiO2气凝胶介孔组装体的制备及光学特性
%A YAO Lian-Zeng
%A YE Chang-Hui
%A MOU Ji-Mei
%A CAI Wei-Li
%A <br>姚连增
%A 叶长辉
%A 牟季美
%A 蔡维理
%J 无机材料学报
%D 2001
%I Science Press
%X The studies were focused on the optical properties of supercritical-drying-technique-prepared silica aerogels assembled with PbS colloids synthesized by colloidal chemistry route. Transmission electron microscope was used to image the assembled samples. Fluorescence spectroscopy and absorption spectrophotometer were employed to investigate the optical properties of the assembled systems. Large optical absorption edges red-shift along with the increase of annealing temperature was observed, which can be attributed to the quantum confinement effects. Photoluminescence intensity enhances along with the increase of the annealing temperature to the maximum at 573K, dropping thereafter, and the photoluminescence peaks show small red-shifts in the meanwhile. These phenomena are related to quantum confinement effects, defect states in the particle surface and excitonic recombination probability.
%K meso-porous assemblies
%K aerogels
%K quantum confinement effect<br>介孔组装体
%K 气凝胶
%K 量子限域效应
%K 纳米级
%K 硫化铅
%K 二氧化硅
%K 光学性能
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=4D46B005DEB0801C&yid=14E7EF987E4155E6&vid=7801E6FC5AE9020C&iid=CA4FD0336C81A37A&sid=39EEF47180459690&eid=C3BF5C58156BEDF0&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=9&reference_num=19