Engineering ZIF-8@Ag Core-satellite Superstructures through Solvent-induced Tunable Self-assembly for Surface-Enhanced Raman Spectroscopy

IF 5.8 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale Pub Date : 2025-01-14 DOI:10.1039/d4nr03191a

Yanyan Chen, Yan Xia, Mengqi Lyu, Ming Jiang, Yutong Hong, Zhenghong Guo, Juan Li, Zhengping Fang

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引用次数: 0

Abstract

Metal-organic frameworks (MOFs) based substrates have great potential for quantitative analysis of hazardous substances using surface-enhanced Raman spectroscopy (SERS) due to their significant signal enhancement, but face challenges like complex preparation, and lack of tunability. Here, we have successfully prepared a well-defined core-satellite superstructure (ZIF-8@Ag) through solvent-induced assembly of silver nanoparticles (Ag NPs) on truncated rhombic dodecahedral ZIF-8. By wisely selecting toluene as the solvent, the assembly process can be easily initiated through ultrasonic treatment and allows for precise morphological adjustments to build a range of superstructures with different assembly density of Ag NPs via feed ratio tuning. The as-prepared ZIF-8@Ag substrate leverages the high-density distribution of Ag NPs and the exceptional adsorption capabilities of ZIF-8. This combination makes it an outstanding SERS substrate for the detection of crystal violet (CV) and methylene blue (MB), achieving a concentration as low as 1×10-10 M and 1×10-9 M, respectively. Moreover, the Raman analytical enhancement factor (AEF) of this ZIF-8@Ag substrate can reach 1.35 × 107, and the Raman signals exhibited high homogeneity. These findings are essential for constructing complex structures and achieving better performance in SERS enhancement substrates, which can broaden the application of this technology in other fields.

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工程ZIF-8@Ag通过溶剂诱导可调自组装表面增强拉曼光谱核心-卫星超结构

基于金属有机框架（mof）的衬底由于其显著的信号增强，在利用表面增强拉曼光谱（SERS）对有害物质进行定量分析方面具有很大的潜力，但面临着制备复杂和缺乏可调性等挑战。在这里，我们成功地通过溶剂诱导组装银纳米粒子（Ag NPs）在截断的菱形十二面体ZIF-8上制备了一个定义明确的核心-卫星超结构（ZIF-8@Ag）。通过明智地选择甲苯作为溶剂，组装过程可以很容易地通过超声波处理启动，并允许精确的形态调整，通过进料比调节建立一系列具有不同组装密度的银纳米粒子的上层结构。制备的ZIF-8@Ag底物利用了Ag NPs的高密度分布和ZIF-8的特殊吸附能力。这种组合使其成为检测结晶紫（CV）和亚甲基蓝（MB）的优秀SERS底物，其浓度分别低至1×10-10 M和1×10-9 M。此外，该ZIF-8@Ag衬底的拉曼分析增强因子（AEF）可达1.35 × 107，拉曼信号具有较高的均匀性。这些发现对于在SERS增强衬底中构建复杂结构和获得更好的性能至关重要，可以拓宽该技术在其他领域的应用。

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

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.