WS2 nanotubes dressed in gold and silver: Synthesis, optoelectronic properties, and NO2 sensing

PROCEEDINGS OF INTERNATIONAL CONGRESS ON GRAPHENE, 2D MATERIALS AND APPLICATIONS (2D MATERIALS 2019) Pub Date : 2021-06-22 DOI:10.1063/5.0055823

A. Polyakov, L. Yadgarov, V. Lebedev, R. Chumakov, L. Yashina, M. Rumyantseva, R. Tenne, E. Goodilin

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Abstract

This conference contribution is focused on decoration of WS2 nanotubes (NT-WS2) with gold and silver nanoparticles via facile routes implying direct reaction of tungsten disulfide with water-soluble AuIII and AgI species at 100°C. The underlying mechanism of these interactions will be discussed in details based on extensive studies of reaction mixtures and resulting metal–NT-WS2 nanocomposites, including thorough X-ray photoelectron spectroscopy (XPS) analysis. Surprising features in optical spectra of the designed nanocomposites would be reported, including suppression of plasmon resonance in tiny noble metal nanoparticles (< 10 nm in diameter) grown onto NT-WS2. The plasmonic features of individual gold nanoparticles on the surface of disulfide nanotube were also characterized by electron energy loss spectroscopy in scanning transmission electron microscopy mode (STEM-EELS). Photoresistive NO2−sensing response of NT-WS2 under green light illumination (λmax = 530 nm) and its enhancement by plasmonic gold “nanoantennas” will be reported as well.

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金和银修饰WS2纳米管:合成、光电特性和NO2传感

本次会议的贡献集中在用金和银纳米粒子修饰WS2纳米管(NT-WS2)上，这意味着在100°C下，二硫化钨与水溶性AuIII和AgI直接反应。这些相互作用的潜在机制将基于对反应混合物和产生的金属- nt - ws2纳米复合材料的广泛研究，包括彻底的x射线光电子能谱(XPS)分析，详细讨论。所设计的纳米复合材料在光谱上的惊人特征将被报道，包括在NT-WS2上生长的微小贵金属纳米颗粒(直径< 10 nm)的等离子体共振被抑制。利用扫描透射电子显微镜(STEM-EELS)对二硫化纳米管表面单个金纳米粒子的等离子体特征进行了表征。本文还将报道NT-WS2在绿光(λmax = 530 nm)照射下的光敏NO2−响应及其等离子体金“纳米天线”的增强。

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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PROCEEDINGS OF INTERNATIONAL CONGRESS ON GRAPHENE, 2D MATERIALS AND APPLICATIONS (2D MATERIALS 2019)

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