Plasma-Induced Wafer-Scale Self-Assembly of Silver Nanoparticles and Application to Biochemical Sensing.

Yunbo Shi,Miaomiao Zhao,Jun Tang,Hao Guo,Chenyang Xue,Jiangtao Yang,Jun Liu

doi:10.3390/ma8073806

Abstract

In this work, the wafer-scale silver nanoparticles fabricated by a self-assembly method was demonstrated based on a magnetron sputtering and plasma treatment process. Silver nanoparticles of different sizes and shapes were prepared, and the effects of the plasma treatment time, plasma gas composition, and power were systematically investigated to develop a method for low-cost and large-scale fabrication of silver nanoparticles. Furthermore, the surface-enhanced Raman scattering experiments: crystal violet, as the probe, was absorbed on the silver nanoparticles film of different size and density, and get the phenomena of surface-enhanced Raman scattering and surface-enhanced fluorescence. The results show that the proposed technique provides a rapid method for the fabrication of silver nanomaterial; the method is adaptable to large-scale production and is compatible with the fabrication of other materials and biosensors.

Highlights

Due to the unique optical and electronic properties of the metallic nanoparticles, precious metal nanomaterials such as gold and silver have received considerable attention in recent years, leading to the development of increasingly sensitive analytical techniques with the advancement of nanotechnology [1,2]
The chemical methods adopted for the fabrication of silver nanomaterials require the addition of harsh reducing reagents, which may result in the presence of chemical residues after the reaction
This paper reports the synthesis of silver nanomaterials with different sizes and shapes on substrates using a plasma-induced technique

Summary

Introduction

Due to the unique optical and electronic properties of the metallic nanoparticles, precious metal nanomaterials such as gold and silver have received considerable attention in recent years, leading to the development of increasingly sensitive analytical techniques with the advancement of nanotechnology [1,2]. Their potential applications span over many new fields, such as catalysis, photography, optics, electronics, optoelectronics, information storage, biological and chemical sensing, and surface-enhanced Raman scattering (SERS) [3,4,5,6]. Compared to other reported methods for the fabrication of silver nanomaterials, the proposed technique provides a rapid method that can be adapted to large-scale production and is compatible with the fabrication of other materials and biosensors

Preparation of Wafer-Level Low-Dimensional Structures

Ordered Controlled Preparation of Low-Dimensional Structures

Wafer-Scale Low-Dimensional Ordered Structures

Surface Raman Enhancement and Surface Fluorescence Enhancement

Experimental

Conclusions