基于金-银合金材料的波导耦合金属光子晶体传感特性研究

Sensing Characteristics of the Gold-Silver Alloy Nanoparticles Assembled Waveguided Metallic Photonic Crystals

摘要:

改进Brust法,我们合成了1-己硫醇修饰的原子组成为Ag_0.66Au_0.33的合金纳米颗粒。以该合金纳米颗粒为构建单元我们采用溶液法成功组装了波导耦合一维合金光子晶体结构。利用该结构搭建的生物传感器的灵敏度是相同条件下纯金结构的2.5倍。金-银合金纳米颗粒组装的波导耦合金属光子晶体传感器以其低成本的制备工艺和简单的测试光路表现出潜在的应用前景。

Abstract:

By improving Brust method, we synthesize 1-hexanthiol modified gold-silver alloy nanoparticles with an atomic composition of Ag_0.66Au_0.33. By using the alloy nanoparticles as “building block”, we successfully assemble one-dimensional waveguided alloy photonic crystals through a solution processible method. Under the same conditions, the sensitivity of the biosensor built with the waveguided alloy photonic crystals is 2.5 times that of the similar structure made of pure gold. Gold-silver alloy nanoparticles assembled waveguided metallic photonic crystals exhibits potential application in biosensors due to its low-cost fabrication process and simple testing methods.