颗粒间距可控、形貌均匀的周期性贵金属纳米点阵列制备新方法及其SERS活性研究

项目名称： 颗粒间距可控、形貌均匀的周期性贵金属纳米点阵列制备新方法及其SERS活性研究

项目编号： No.51475014

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 赵艳

作者单位： 北京工业大学

项目金额： 85万元

中文摘要： 周期性贵金属纳米点阵列具有独特的非线性光学效应，在微纳光电器件领域有极为广阔的应用前景。其中，纳米颗粒单元的形貌、间距控制是决定阵列性能及其应用价值的关键，也是本领域研究的热点和难点。本项目提出基于AAO模板的贵金属纳米点阵列构筑技术，以AAO模板的可控制备为切入点，以激光辐照对贵金属纳米颗粒形貌的均匀优化处理为突破口，以纳米颗粒与AAO模板纳米孔的匹配控制为主线，巧妙地将纳米颗粒组装架构在AAO模板的孔洞上，通过改变AAO模板的孔洞尺寸以及孔心距，实现阵列结构中纳米颗粒尺寸以及间距的可调控性。系统研究此阵列结构的局域表面等离激元共振及电场增强特性，揭示其SERS活性增强机制，从工艺-性能-工艺出发，提出一套简单高效、低成本、颗粒间距可控，形貌均匀的周期性贵金属纳米颗粒阵列制备的新方法，并为有序金属纳米颗粒阵列的工业化制备及其器件化应用提供拥有自主知识产权的技术基础。

中文关键词： 贵金属微/纳结构阵列；激光辐照；表面增强拉曼散射；模板；间距可控

英文摘要： The periodic noble metal naoarry has great potential applications in the field of mirco-nano optoelectronic devices due to the special optical nonlinearity effects. The morphology and spacing of nanoparicles are the decisive factors to the properties and application values of nanoarray. However, till now, the control of morphology and spacing of the nanoparticles is still the key problem which attracted the widely interest among the researchers. In this project, the fabrication technique of noble metal nanodots array based on the AAO template is presented. The controllable preparation of AAO template is the beginning. Then, the laser irradiation technique is used to the modification of morphology for the noble metal nanoparticles. The nanoparticles have been modified to have a good match to the size of AAO holes. And interestingly, the modified nanoparticles will be organized onto the hole of the AAO tempalte skillfully. Through the changes of AAO hole size and center-to-center spacing, the goal of controllable spacing and size for nanoparticles could be realized. And also,the properties of localized surface plasmon resonance and electric field enhancement will be investigated systematically.The SERS mechanism will be discussed and the laser irradiation effect on the modification of morphology for noble metal nanoparticles will be analysed. Usually,the performance of the nanoarry is dependent on the preparation technology. Based on the feeback from the performance, a simple and lowcost method of making periodic noble metal nanoparticle array, which has controllable spacing and uniform morphology, will be formed. What's more, the results of this project will provide the technique foundation for industry manufacture of ordered metal nanoparticals array and application of mirco-nano optoelectronic devices.

英文关键词： noble metal micro/nano structure array;laser irradiation;Surface enhanced Raman scattering;template;controllable spacing