银纳米颗粒的局域表面等离子体共振传感

J4 ›› 2010, Vol. 27 ›› Issue (1): 117-120.

• 光电技术及材料 • 上一篇

银纳米颗粒的局域表面等离子体共振传感

谢志国鲁拥华阎杰林开群陶俊王沛明海

1 中国科学技术大学物理系，安徽合肥 230026；
2 安徽省光电子科学与技术重点实验室，安徽合肥 230026

出版日期:2010-01-28 发布日期:2009-12-30
通讯作者: 明海 (1947 -)，教授，博士生导师，现任中国科学技术大学光子技术研究所所长，安徽省光电子科学与技术重点实验室主任，中国光学学会理事，中国光学学会光电专业委员会副主任，享受国务院特殊贡献津贴。 E-mail:minghai@ustc.edu.cn
作者简介:谢志国（1982 -），男，安徽青阳人，中国科学技术大学博士研究生，主要研究方向为光纤传感。E-mail：zhgxie@mail.ustc.edu.cn
基金资助:
国家重点基础研究发展计划（2006CB302905），国家自然科学基金重点项目（60736037），国家自然科学基金面上项目（10704070）, 安徽省优秀青年科技基金 (08040106805)

Localized surface plasmons resonant sensor based on Ag nanoparticles

XIE Zhi-Guo, LU Yong-Hua, YAN Jie, LIN Kai-Qun, TAO Jun, WANG Pei, MING Hai

1 Department of Physics, University of Science and Technology of China, Hefei 230026, China;
2 Anhui key laboratory of optoelectronic science and technology, Hefei 230026, China

Published:2010-01-28 Online:2009-12-30

摘要/Abstract

摘要：

采用微波法合成银纳米颗粒，通过化学自组装技术将银纳米颗粒吸附在玻璃基片上，制备了银纳米颗粒的局域表面等离子体传感器。在纯水中，紫外可见光消光谱表明局域表面等离子体共振位于428nm处。随外界折射率增加，共振峰发生红移，其折射率灵敏度达到173±6nm/RIU。在350oC温度下退火处理后，改变银颗粒在基片上的形貌，峰位发生约65nm的红移，灵敏度下降约20%。理论分析表明，银纳米颗粒形状和基底的相互作用影响折射率传感的波长响应和灵敏度特性。

关键词: 光电子学, 局域表面等离子体, 银纳米颗粒, 自组装, 折射率传感

Abstract:

Ag nanoparticles are prepared by microwave synthesizing method, and then are absorbed on the glass slide by self-assembling technology. Thus, the localized surface plasmons resonant (LSPR) sensor is developed. Uv-Vis absorption spectrum shows that its LSPR peak is located at 428nm in pure water. The LSPR peak takes red shift when the refractive index of surrounding solution increases, and the sensitivity can arrive at 173nm± 6nm/RIU. After annealing at 350oC, the shape of Ag nanoparticles on the glass slide is changed. The LSPR peak shifts about 65nm towards longer wavelength, the sensitivity decreases with 20%. Theoretical analysis indicates that shape and substrate take important effect on the response of wavelength and the sensitivity for the refractive index sensor of Ag nanoparticles.

Key words: optoelectronics, localized surface plasmons, Ag nanoparticles, self-assembly, refractive index sensor

谢志国鲁拥华阎杰林开群陶俊王沛明海. 银纳米颗粒的局域表面等离子体共振传感[J]. J4, 2010, 27(1): 117-120.

XIE Zhi-Guo, LU Yong-Hua, YAN Jie, LIN Kai-Qun, TAO Jun, WANG Pei, MING Hai. Localized surface plasmons resonant sensor based on Ag nanoparticles[J]. J4, 2010, 27(1): 117-120.

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银纳米颗粒的局域表面等离子体共振传感

Localized surface plasmons resonant sensor based on Ag nanoparticles

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