纳米金局域表面等离子体共振增强光电化学传感的研究

项目名称： 纳米金局域表面等离子体共振增强光电化学传感的研究

项目编号： No.21305123

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李红波

作者单位： 盐城工学院

项目金额： 25万元

中文摘要： 纳米贵金属等离子体能够有效集聚能量，提高光激子浓度并促进半导体载流子分离，现已成为光伏领域的研究热点。针对光电化学传感体系载流子易复合、灵敏度不高等问题，本项目将开展纳米金局域表面等离子体共振在光电化学传感领域的系统性研究，揭示其增强光电化学传感的作用机制。研究不同尺寸、形貌功能无机纳米半导体或其异质结半导体和纳米金的可控合成；深入探究纳米金与光电信标的组装间距和纳米金的尺寸、形貌、间距以及周围介质对光电信号的影响；调控核酸适配体或催化酶在纳米金上的高密度组装；探讨探针与靶分子的作用机制；建立高效纳米金局域表面等离子体共振增强光电化学传感的新原理与新体系，以实现超灵敏、免标记及快速检测。本工作创造性地集成纳米金局域表面等离子体共振和光电化学传感的优点，拓展了纳米金的应用领域，为食品安全检测及预警机制的建立提供新平台，并将促进光电化学分析领域的发展。

中文关键词： 光电化学；传感器；纳米金；等离子体振子；半导体

英文摘要： Nano-sized noble metal plasmonics have been a hot research in the field of photovoltaics since they can efficiently focuse energy and enhance the concentration of photoexcitons and also help promoting the seperation of the carriers. In order to overcome the disadvantages of the carrier recombination to improve the detection sensitivity, the localized surface plasmon resonance of nano-sized Au in photoelectrochemical sensing will be studied in detail. The specific contents are as follows: Firstly, the controlled synthesis of different size, morphology and functionized inorganic nano-sized semiconductor, heterojunction semiconductor and nano-sized Au. Secondly, the effects of the size, morphology, spacing and ambient medium of nano-sized Au and the distance between it and photoelectric beacon on photocurrent will be further researched. Thirdly, the aptamer or catalyzing enzyme will be highly assembled on the surface of nano-sized Au and the mechanism between the probes and targets will also be discussed. In a word, a new mechanism or system of the high performance nano-sized Au enhanced photoelectrochemical sensing will be developed and it can be applied to the ultrasensitive, label-free and fast determination. This work will creatively integrate the merits of nano-sized Au localized surface plasmon resonance and

英文关键词： Photoelectrochemistry；Sensor；Nano-gold；plasmon；Semiconductor