Fabrication of Ag/ZnO composite nanoflowers for ultrasensitive and recyclable SERS detection toward Rhodamine 6G

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-05 DOI:10.1016/j.optmat.2025.117485

Yanfen Wang , Pengfei Jia , Jie Ai , Gangzheng Liu , Shuangshuang Liu , Juan Gao , Zhaoqi Sun

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引用次数: 0

Abstract

Novel Ag/ZnO composite nanoflowers (CNFs) had been designed as a surface-enhanced Raman scattering (SERS) substrate for organic molecule detection. Flower-like ZnO architecture was firstly synthesized by a low-temperature precipitation method, and subsequently Ag nanoparticles were decorated on ZnO nanoflowers through a photochemical reaction. The optimal Ag component was investigated by changing the photo-reduction time of Ag⁺ in the ZnO precursor solution. It is found that the Ag nanoparticles with suitable size and crystallinity are significantly related to the light absorption and Raman signals for Ag/ZnO substrate. For Rhodamine 6G (R6G) as probe molecules, the optimal Ag/ZnO-40 min CNFs achieve a low detection limit of 1.0 × 10⁻¹² M and a high enhanced factor (EF) of 1.74 × 10⁶. Due to its excellent photocatalytic activity, the Ag/ZnO active substrate effectively degrades R6G molecules adsorbed on the surface, displaying an excellent self-cleaning property and stable recyclability. Such a superior SERS performance can be attributed to the synergy effect of two components (Ag nanoparticles and ZnO nanoflowers) such as its unique architecture, charge transfer and high-density hot spots.

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Ag/ZnO复合纳米花对罗丹明6G超灵敏可回收SERS检测的制备

设计了一种新型Ag/ZnO复合纳米花（CNFs）作为表面增强拉曼散射（SERS）底物，用于有机分子检测。首先采用低温沉淀法合成了花状ZnO结构，然后通过光化学反应将银纳米粒子修饰在ZnO纳米花上。通过改变Ag+在ZnO前驱体溶液中的光还原时间，研究了最佳的Ag组分。研究发现，合适尺寸和结晶度的银纳米粒子对银/ZnO衬底的光吸收和拉曼信号有显著影响。以罗丹明6G （R6G）为探针分子，最佳的Ag/ZnO-40 min CNFs的检出限为1.0 × 10−12 M，增强因子（EF）为1.74 × 106。Ag/ZnO活性底物具有优异的光催化活性，能有效降解吸附在表面的R6G分子，表现出优异的自清洁性能和稳定的可回收性。这种优越的SERS性能可归因于两种组分（Ag纳米粒子和ZnO纳米花）的协同效应，如其独特的结构，电荷转移和高密度的热点。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.