ZnO/Ag nanostructures for surface-enhanced Raman spectroscopy: effect of wedge microcavity.

IF 2.8 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanotechnology Pub Date : 2025-09-12 DOI:10.1088/1361-6528/ae01ab

Olesya O Kapitanova, Anastasiya V Kornilova, Nikita D Mitiushev, Irina A Veselova, Viktor Yu Timoshenko, Andrei N Baranov

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引用次数: 0

Abstract

Zinc oxide (ZnO) nanostructures with deposited silver (Ag) nanoparticles (NPs) exhibit exceptional opportunities for highly sensitive molecular diagnostics by means of the surface-enhanced Raman spectroscopy(SERS). Here we use the well known method of the hydrothermal synthesis of arrays of ZnO nanorods (NRs), followed with deposition of Ag-NPs by facile photochemical reduction under UV-light illumination to obtain ZnO-NRs/Ag-NPs hybrid structures with superior SERS activity. SERS spectra of a probe analyte, i.e. Rhodamine R6G molecules absorbed in an optimized ZnO-NRs/Ag-NPs structures, are detected in a wide range of the analyte concentration from 10^-6to 10^-14M. Numerical simulations of the light scattering in ZnO-NRs/Ag-NPs structures allow us to show that the wedge-like morphology of ZnO-NRs plays a crucial role in the 3D electromagnetic enhancement of the SERS signal, which can be as high as 3•10⁸for the lowest analyte concentration. The revealed high SERS activity of the obtained ZnO/Ag hybrid nanostructures together with the simplicity of their preparation open new prospects for their application in analytical chemistry, sensorics and photonics.

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ZnO/Ag纳米结构表面增强拉曼光谱：楔形微腔的影响。

氧化锌（ZnO）纳米结构与沉积银（Ag）纳米粒子（NPs）表现出通过表面增强拉曼散射（SERS）进行高灵敏度分子诊断的特殊机会。本文采用水热合成ZnO纳米棒阵列的方法，然后在紫外光照射下通过光化学还原沉积Ag-NPs，得到具有优异SERS活性的ZnO-NRs/Ag-NPs杂化结构。ser光谱探针的分析物,即罗丹明R6G分子,这些在一个优化ZnO-NRs / Ag-NPs结构,发现在一个广泛的分析物的浓度从10 - 6到10 - 14 m .数值模拟的光散射ZnO-NRs / Ag-NPs结构允许我们显示wedge-like ZnO-NRs起着至关重要的作用的形态学的3 d电磁增强ser信号,也可高达3•108年最低的分析物的浓度。所获得的ZnO/Ag杂化纳米结构具有较高的SERS活性，且制备简单，为其在分析化学、传感学和光子学等领域的应用开辟了新的前景。

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

Nanotechnology 工程技术-材料科学：综合

CiteScore

7.10

自引率

5.70%

发文量

820

审稿时长

2.5 months

期刊介绍： The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.