铜银合金纳米岛的可控制备及其量子点荧光增强性能  

Controllable Preparation and Quantum Dot Fluorescence Enhancement Performance of Cu-Ag Alloy Nanoislands

作　　者：张简玙 张健[1] Zhang Jianyu;Zhang Jian(School of Instrument Science and Opto-Electronics Engineering,Beijing Information Science and Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192

出　　处：《微纳电子技术》2024年第8期133-141,共9页Micronanoelectronic Technology

基　　金：国家自然科学基金青年科学基金(61905016)。

摘　　要：目前对于单金属纳米材料的研究已经非常广泛,但是合金纳米材料的相关研究还有待进一步开发。如何在降低成本、简化制备方法的基础上,对合金纳米材料进行更深入的探索是目前的一个研究方向。提出了一种利用磁控溅射结合真空退火制备铜银合金纳米岛结构的新方法。通过控制溅射时间、溅射顺序和退火温度,可实现不同形貌、不同光谱响应特性的铜银合金纳米岛结构的可控制备。选用制备的铜银合金纳米岛作为CdSe量子点荧光增强基底。实验结果表明,铜银合金纳米岛基底的量子点样品的荧光强度相较于单纯的量子点样品有显著增强,增幅达到4.71倍,荧光寿命缩短了7.9ns。提出的铜银合金纳米岛制备方法具有成本低、速度快、重复性好等优点,为铜银合金纳米结构的研究提供了一种新的思路和方法,为等离激元微纳米结构在多领域应用和产业化提供了参考。At present,the research on monometallic nanomaterials is already quite extensive,but the related research of alloy nanomaterials needs to be further developed.On the basis of reducing the cost and simplifying the preparation method,it is a current research direction to explore the alloy nanomaterials more deeply.A novel method for preparing Cu-Ag alloy nanoisland structures by magnetron sputtering combined with vacuum annealing was presented.By controlling the sputtering time,sputtering sequence and annealing temperature,the controllable preparation of Cu-Ag alloy nanoisland structures with different morphologies and spectral response characteristics can be achieved.The prepared Cu-Ag alloy nanoislands were selected as the fluorescence enhanced substrate for CdSe quantum dots.Experimental results show that the fluorescence intensity of quantum dot sample with the Cu-Ag alloy nanoisland as substrate is significantly enhanced compared with the simple quantum dot sample,which the increase amplitude reaches 4.71 times and the fluorescence lifetime is shortened by 7.9 ns.The proposed preparation method for Cu-Ag alloy nanoislands has advantages such as low cost,fast speed and good repeatability,providing a new idea and method for the research of Cu-Ag alloy nanostructures and references for the application and industrialization of plasmon micronanostructures in various fields.

关 键 词：微纳光子学 铜银合金纳米岛 局域表面等离激元 量子点 荧光增强 

分 类 号：O433[机械工程—光学工程] TN04[理学—光学]