表面修饰的ZnS:Mn量子点的发光性质及其对生物分子的检测

杜鸿延; 魏志鹏; 李霜; 楚学影; 方铉; 方芳; 李金华; 陈新影; 王晓华

doi:10.3788/fgxb20133404.0421

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表面修饰的ZnS:Mn量子点的发光性质及其对生物分子的检测

材料合成及性能 | 更新时间：2020-08-12

- 表面修饰的ZnS:Mn量子点的发光性质及其对生物分子的检测
- Luminescent Properties of Surface Modified ZnS:Mn Quantum Dot and Detection of Biological Molecules
- 发光学报 2013年34卷第4期页码：421-426
- 作者机构：
  
  1. 长春理工大学高功率半导体激光国家重点实验室,吉林长春,130022
  2. 长春理工大学理学院, 吉林长春 130022
- 作者简介：
- 基金信息：
  
  国家自然科学基金(61006065,61076039,61204065,61205193)();高功率半导体激光国家重点实验室基金(9140C310101120C031
- DOI：10.3788/fgxb20133404.0421
  中图分类号： O614
- 收稿日期：2012-12-18，
  
  修回日期：2013-01-25，
  
  网络出版日期：2012-12-31，
  
  纸质出版日期：2013-04-10
- 稿件说明：
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杜鸿延, 魏志鹏, 李霜, 楚学影, 方铉, 方芳, 李金华, 陈新影, 王晓华. 表面修饰的ZnS:Mn量子点的发光性质及其对生物分子的检测[J]. 发光学报, 2013,34(4): 421-426

DU Hong-yan, WEI Zhi-peng, LI Shuang, CHU Xue-ying, FANG Xuan, FANG Fang, LI Jin-hua, CHEN Xin-ying, WANG Xiao-hua. Luminescent Properties of Surface Modified ZnS:Mn Quantum Dot and Detection of Biological Molecules[J]. Chinese Journal of Luminescence, 2013,34(4): 421-426
杜鸿延, 魏志鹏, 李霜, 楚学影, 方铉, 方芳, 李金华, 陈新影, 王晓华. 表面修饰的ZnS:Mn量子点的发光性质及其对生物分子的检测[J]. 发光学报, 2013,34(4): 421-426 DOI： 10.3788/fgxb20133404.0421.

DU Hong-yan, WEI Zhi-peng, LI Shuang, CHU Xue-ying, FANG Xuan, FANG Fang, LI Jin-hua, CHEN Xin-ying, WANG Xiao-hua. Luminescent Properties of Surface Modified ZnS:Mn Quantum Dot and Detection of Biological Molecules[J]. Chinese Journal of Luminescence, 2013,34(4): 421-426 DOI： 10.3788/fgxb20133404.0421.

摘要

采用水热法制备了ZnS:Mn量子点

探讨了掺杂离子浓度对ZnS:Mn量子点的晶体结构和发光性质的影响。通过荧光光谱对样品进行表征。结果表明:掺杂离子的摩尔分数达到2%时

ZnS:Mn量子点在595 nm附近的发光最强;继续增加掺杂浓度反而出现荧光猝灭的现象。本文还研究了表面修饰对量子点形貌和发光性质的影响。通过透射电子显微镜(TEM)观察样品的形貌

发现经过3-巯基丙酸(MPA)修饰后的样品表面团聚现象得到改善

并且尺寸单一、单分散性较好

平均粒径约为5 nm。经过修饰后的样品减少了表面非辐射性缺陷中心

使掺杂Mn

所引起的595 nm附近的发射峰强度增大。将MPA修饰后的ZnS:Mn量子点与牛血清白蛋白(BSA)分子进行生物偶联

并利用BCA法对偶联上的蛋白含量进行定量检测

结果显示经过修饰后的量子点偶联蛋白的能力更强。

Abstract

ZnS:Mn quantum dots were prepared by hydrothermal method. The effect of the doping concentration of ZnS:Mn quantum dots on crystal structure and luminescent properties was discussed. The quantum dots were characterized by the fluorescence spectroscopy. The results indicated that ZnS:Mn quantum dots exhibited the strongest emission at 595 nm

with 2% doping mole fraction

then with doping concentration increasing

the intensity of luminescent decreased due to the fluorescence quenching phenomenon. The effect of surface modification on the morphologies and luminescent properties of quantum dots were also discussed. Transmission electron microscope (TEM) images indicated that the surface aggregation phenomenon of ZnS:Mn quantum dots was improved with the MPA surface modification

the quantum dots also exhibited single size and good dispersibility properties

the average particle diameter was about 5 nm. In addition

the surface non-radiation defect centers were reduced

which caused emission peak intensity increasing at 595 nm by Mn

doping. The surface modified ZnS:Mn quantum dots were conjugated with bovine serum albumin (BSA) molecules. In BCA detection

the results indicated that the surface modified ZnS:Mn quantum dots had the better biological conjugation property.

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Keywords

references

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