title: CO2-Assisted Fabrication of Two-Dimensional Amorphous Molybdenum Oxide Nanosheets for Enhanced Plasmon Resonances.
abstract: 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 MoS2and subsequent supercritical CO2-treatment, which is a crucial step for the achievement of amorphous structure of MoO3. Upon illumination, hydrogen-doped MoO3exhibits tuned surface plasmon resonances in the visible and near-IR regions. Moreover, a unique behavior of the amorphous MoO3nanosheets 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.
authors.affiliation: College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
authors.forename: Qun
authors.initials: Q
authors.lastname: Xu
authors.affiliation: College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
authors.forename: Weili
authors.initials: W
authors.lastname: Cui
authors.affiliation: College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
authors.forename: Chuanhui
authors.initials: C
authors.lastname: Zhu
authors.affiliation: College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
authors.forename: Yuhang
authors.initials: Y
authors.lastname: Qi
keywords: amorphous phases; biosensing; molybdenum oxides; molybdenum sulfides; surface plasmon resonance