大面积自组装金纳米颗粒超晶格薄膜的制备及光学特性研究  

Preparation and optical characterization of largearea self-assembled gold nanoparticle superlattice films

作　　者：黄信 史作盐 宋明霞 虞应 刘绍鼎 Huang Xin;Shi Zuoyan;Song Mingxia;Yu Ying;Liu Shaoding(Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;College of Electronic Information and Optical Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原理工大学新型传感器与智能控制教育部重点实验室,山西太原030024 [2]太原理工大学电子信息与光学工程学院,山西太原030024

出　　处：《光电工程》2024年第6期12-20,共9页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(11804408);山西省基础研究计划项目(202203021221080)。

摘　　要：自组装贵金属纳米颗粒超晶格等离激元与光场的耦合能够激发极化激元模式,在增强光谱及传感等领域具有重要的应用前景。然而目前自组装方法制备超晶格薄膜层数较难控制,同时样品尺寸较小,限制了相关应用的发展。本文基于润湿增强的界面自组装方法可快速、大面积制备单层密排纳米颗粒薄膜的特性,采用逐层堆叠方法制备了具有不同层数的大面积、均匀分布的金纳米颗粒超晶格薄膜样品。实验及计算透/反射光谱表明,所制备超晶格样品能够有效激发极化激元模式,同时高阶极化激元模式随着超晶格层数的增加也可被有效激发。此外,通过调整纳米颗粒尺寸也可有效调制极化激元模式的共振峰位。这些研究为制备大面积高质量纳米颗粒超晶格薄膜提供了一种有效的方案,有望用于高性能微纳光子器件的设计。Self-assembly of noble metal nanoparticles into superlattices can couple with plasmonic modes and light fields,holding significant promise in enhanced spectroscopy and sensing applications.However,controlling the number of layers in these self-assembled superlattice films is challenging,and small sample sizes limit their potential applications.In this study,based on a wetting-enhanced interfacial self-assembly method,we demonstrate the rapid and large-scale fabrication of monolayer densely packed nanoparticle films.Additionally,a layer-by-layer stacking method is employed to fabricate large-area,uniformly distributed gold nanoparticle superlattice films with different numbers of layers.Both experimental and computational transmission/reflection spectra indicate that the prepared superlattice samples effectively excite plasmonic modes,and higher-order plasmonic modes can also be efficiently excited with increasing superlattice layers.Moreover,adjusting the nanoparticle size enables effective modulation of the resonance peak positions of plasmonic modes.These findings provide an effective approach for the large-scale fabrication of high-quality nanoparticle superlattice films,holding promise for the design of high-performance micro/nano photonic devices.

关 键 词：金纳米颗粒 纳米颗粒超晶格 时域有限差分法 极化激元模式 

分 类 号：O437[机械工程—光学工程]