Microstructure evolution behavior and SERS properties of self-grown Ag/Ag-Nb nano-island films sputtered on flexible substrates

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2024-11-03 DOI:10.1016/j.vacuum.2024.113802

Haitao Zheng , Mingshuai Shen , Zunyan Xie , Ziyi Li , Mengran Zhang , Haoliang Sun

引用次数: 0

Abstract

Ag-Nb alloy films with varying Nb content were deposited on flexible polyimide substrates by the magnetron sputtering metho. The results show that dense and monodisperse Ag nano-islands were self-grown on the surfaces of as-deposited Ag-31.1 at% Nb alloy films. FDTD simulations revealed that the local electric field strength is closely related to the covering Ag layer, size and spacing of self-grown nano-islands. A 166-nm Ag-31.1 % Nb alloy film covered with 15-nm Ag layer served as the SERS substrate presented excellent and stable SERS performance and can detect 5 × 10⁻¹⁴ mol/L R6G solution. The preparation method of Ag nano-island/alloy films offers a novel approach for producing reproducible and highly sensitive SERS substrates.

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在柔性基底上溅射自生长的银/银-铌纳米岛薄膜的微结构演化行为和 SERS 特性

利用磁控溅射法在柔性聚酰亚胺基底上沉积了不同铌含量的铌镁合金薄膜。结果表明，在沉积的 Ag-31.1 at% Nb 合金薄膜表面自生长出致密、单分散的 Ag 纳米层。FDTD 模拟显示，局部电场强度与覆盖的银层、自生长纳米岛的尺寸和间距密切相关。166纳米的Ag-31.1% Nb合金薄膜上覆盖着15纳米的Ag层，作为SERS基底，该薄膜具有优异稳定的SERS性能，可检测5×10-14 mol/L R6G溶液。纳米银岛/合金薄膜的制备方法为生产可重现的高灵敏度 SERS 基底提供了一种新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.