电介质上金属薄膜的低能离子束表面纳米化及其光学性质的研究

项目名称： 电介质上金属薄膜的低能离子束表面纳米化及其光学性质的研究

项目编号： No.11505086

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 蒙萱

作者单位： 兰州大学

项目金额： 21万元

中文摘要： 由于工程上的重要性，低维固体系统的光学性质引起科研人员的广泛关注。最为人所知的光学特性就是金属纳米粒子的局域表面等离子体共振效应（LSPR）及其在表面增强的拉曼谱仪（SERS）方面的应用。与传统的化学合成法相比，离子束辐照的方法使得贵金属纳米粒子跟基底材料的粘和性更强。因此，离子束辐照制作贵金属纳米粒子的方法引起了科研人员的注意。据此，本项目拟采用离子束辐照的方法，来研究离子束引起的电介质表面贵金属薄膜纳米化的过程。首先研究氢离子束辐照引起金薄膜的纳米化、金薄膜的反浸润过程以及由此产生的金纳米粒子埋入基底材料的过程。其次，我们预期通过改变离子束的辐照参数来控制所生成金纳米粒子的大小跟形状，以达到调制纳米粒子光学特性的目的。最后，我们引入金银二元合金的纳米粒子以及不同的基底材料，以期待在一个更广阔的范围内对贵金属纳米粒子的光学特性实现调制。本团队拥有自主的辐照实验装置，长期从事离子束材料改性的研究，为本工作的开展积累了经验。

中文关键词： 离子束表面纳米化；局域表面等离子体共振；表面增强的拉曼谱仪；生物传感器；透射电子显微镜

英文摘要： Optical properties of low–dimensional solid–state systems have attracted considerable attention because of their technological significance. The best–known optical property of metal nanoparticles embedded in glass is the localized surface plasmon resonance (LSPR) and the applications in surface enhanced Raman spectroscopy (SERS). Compared with chemical synthesis methods, the noble metal nanoparticles formed by ion irradiation draw significant interest in recent years because of the strong adhesion of nanoparticles with dielectric substrates. Therefore, a detailed study of ion irradiation induced surface nanostructuring of noble metal films on dielectric substrate was proposed in this project. Firstly, hydrogen ion–beam induced suface nanostructuring, the dewetting of noble metal films and the burrowing of the resulted nanostructures will be studied. Secondly, the tunning of LSPR absorption band through ion irradiation by controlling the nanoparticle’s size and shape will be studied. Further control of LSPR absorption band over a wider range could be achieved by synthesizing bimetallic nanoparticles fabricated in the form of alloys of two metals. Thirdly, LSPR’s dependence on the substrate will be studied by introducing single crystal aluminium oxide, on which the ion irradiation induced surface nanostructuring of the bimetallic films was expected to be different from that on the amorphous silica glass substrate. With the experimental facility and accumulated experience, this project could be completed successfully.

英文关键词： Ion beam surface nanostructuring;localized surface plasmon resonance (LSPR);surface enhanced Raman spectroscopy (SERS);Bio-sensor;transmission electron microscopy (TEM)