CO₂-Assisted Fabrication of Two-Dimensional Amorphous Molybdenum Oxide Nanosheets for Enhanced Plasmon Resonances

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• 作者：Wei Liu ; Prof. Qun Xu ; Weili Cui ; Chuanhui Zhu and Yuhang Qi
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：February 1, 2017
• 年：2017
• 卷：129
• 期：6
• 页码：1622-1626
• 全文大小：3798K
• ISSN：1521-3757

文摘

As a remarkable class of plasmonic materials, two dimensional (2D) semiconductor compounds have attracted attention owing to their controlled manipulation of plasmon resonances in the visible light spectrum, which outperforms conventional noble metals. However, tuning of plasmonic resonances for 2D semiconductors remains challenging. Herein, we design a novel method to obtain amorphous molybdenum oxide (MoO₃) nanosheets, in which it combines the oxidation of MoS₂ and subsequent supercritical CO₂-treatment, which is a crucial step for the achievement of amorphous structure of MoO₃. Upon illumination, hydrogen-doped MoO₃ exhibits tuned surface plasmon resonances in the visible and near-IR regions. Moreover, a unique behavior of the amorphous MoO₃ nanosheets has been found in an optical biosensing system; there is an optimum plasmon resonance after incubation with different BSA concentrations, suggesting a tunable plasmonic device in the near future.