Photothermal Conversion Property of (Au Nanocup)-(Cu 2 O Nanocube) Hybrids Supported by MXene Nanosheets

作者：Fengyuan Zhang, Hangyu Yan, Guowei Li, Zhengwang Cheng, Changcun Han, Zhuo Peng, Li Zhou, Mengdai Luoshan · 发表于：Crystal Growth & Design · 年份：2024 · DOI：10.1021/acs.cgd.4c01404 · 被引用次数：4 · 研究领域：MXene and MAX Phase Materials、ZnO doping and properties、Copper-based nanomaterials and applications

Integrating multiple mechanisms to optimize electromagnetic field enhancement and charge transfer is vital for maximizing the photothermal conversion efficiency. In this study, a structurally tunable ternary plasmonic hybrid, with (Au nanocup)-(Cu 2 O nanocube) hybrids dispersed upon two-dimensional Ti 3 C 2 T X MXene ultrathin nanosheets, is prepared and employed for photothermal conversion application. The Au–Cu 2 O nanostructures are synthesized through a process involving the overgrowth of Cu 2 O nanocubes, with controlled size and quantity, onto the surface of the Au nanocups. Furthermore, transferring the Au–Cu 2 O nanostructures onto plasmonic Ti 3 C 2 T X nanosheets generates further enhanced electromagnetic field intensity around their interface. The photothermal conversion evaluation indicates that the photothermal conversion performance of the MXene/Au–Cu 2 O hybrids is significantly improved, achieving a photothermal conversion efficiency of 51.2% under 808 nm laser excitation, which is attributed to the magnetic plasmon resonance of the Au nanocups, the hot hole injection process due to the multisite growth of Cu 2 O, and the electric field enhancement at the MXene and Au–Cu 2 O interface. This work provides a promising approach to improve photothermal conversion efficiency through the multisite growth of Cu 2 O.