利用二维二硫化钼基底实现扫描离子传导显微镜尖端增强拉曼光谱的高分辨率距离相关性探测

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-10-21 DOI:10.1021/acs.nanolett.4c04200

Xing He, Abu Montakim Tareq, Kai Qi, Ylli Conti, Vincent Tung, Naihao Chiang

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引用次数: 0

摘要

扫描离子电导显微镜（SICM）是一种用于电解环境的强大表面成像工具。尖头增强拉曼光谱（TERS）通过利用金属涂层探针的局部等离子增强作用辅助无标记拉曼光谱，可以在扫描离子电导显微镜提供的形貌信息之外提供更多信息。在本研究中，通过使用银涂层质子纳米管，展示了 SICM 与 TERS 的整合。以二维（2D）二硫化钼（MoS2）为模型系统，通过有限差分时域（FDTD）模拟，估计 SICM-TERS 增强因子为 105。此外，与亚纳米距离相关的 SICM-TERS 研究揭示了纳米吸管引起的拉伸应力和结构变化。这些发现说明了 SICM-TERS 在提供有关电解环境的全面形态和化学见解方面的潜力，为今后研究电催化和生物系统铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

High-Resolution Distance Dependence Interrogation of Scanning Ion Conductance Microscopic Tip-Enhanced Raman Spectroscopy Enabled by Two-Dimensional Molybdenum Disulfide Substrates

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High-Resolution Distance Dependence Interrogation of Scanning Ion Conductance Microscopic Tip-Enhanced Raman Spectroscopy Enabled by Two-Dimensional Molybdenum Disulfide Substrates

Scanning ion conductance microscopy (SICM) is a powerful surface imaging tool used in the electrolytic environment. Tip-enhanced Raman spectroscopy (TERS) can give more information in addition to the morphology provided by the SICM by utilizing label-free Raman spectroscopy aided by the localized plasmonic enhancement from the metal-coated probes. In this study, the integration of SICM with TERS is demonstrated through employing a silver-coated plasmonic nanopipette. Leveraging a two-dimensional (2D) molybdenum disulfide (MoS₂) as a model system, the SICM-TERS enhancement factor was estimated to be ∼10⁵, supported by finite-difference time-domain (FDTD) simulation. Moreover, the subnanometer distance dependence SICM-TERS study reveals the tensile stress and structural changes caused by the nanopipette. These findings illustrate the potential of SICM-TERS for providing comprehensive morphological and chemical insights into electrolytic environments, paving the way for future investigations of electrocatalytic and biological systems.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.