材料科学
荧光
量子点
光致发光
红外线的
纳米材料
傅里叶变换红外光谱
荧光团
单斜晶系
自体荧光
发射光谱
分析化学(期刊)
斯托克斯位移
生物相容性
光电子学
纳米技术
X射线光电子能谱
发光
谱线
化学工程
光学
化学
有机化学
分子
工程类
物理
冶金
天文
作者
Huayan Yang,Yuwei Zhao,Zhengyong Zhang,Hongwei Xiong,Shaoning Yu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2013-01-16
卷期号:24 (5): 055706-055706
被引量:109
标识
DOI:10.1088/0957-4484/24/5/055706
摘要
The second near-infrared window (NIR-II, wavelength of 1.0–1.4 μm) is optimal for the bioimaging of live animals due to their low albedo and endogenous autofluorescence. Herein, we report a facile and one-pot biomimetic synthesis approach to prepare water-dispersible NIR-II-emitting ultrasmall Ag2S quantum dots (QDs). Photoluminescence spectra showed that the emission peaks could be tuned from 1294 to 1050 nm as the size of the Ag2S QDs varied from 6.8 to 1.6 nm. The x-ray diffraction patterns and x-ray photoelectron spectra confirmed that the products were monoclinic α-Ag2S. Fourier transform infrared spectrograph analysis indicated that the products were protein-conjugated Ag2S QDs. Examination of cytotoxicity and the hemolysis test showed that the obtained Ag2S QDs had good biocompatibility, indicating that such a nanomaterial could be a new kind of fluorescent label for in vivo imaging.
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