@article{cd954dc95a6d40d78070832f52cb4569,
title = "Transformation-Optics-Designed Plasmonic Singularities for Efficient Photocatalytic Hydrogen Evolution at Metal/Semiconductor Interfaces",
abstract = "Inspired by transformation optics, we propose a new concept for plasmonic photocatalysis by creating a novel hybrid nanostructure with a plasmonic singularity. Our geometry enables broad and strong spectral light harvesting at the active site of a nearby semiconductor where the chemical reaction occurs. A proof-of-concept nanostructure comprising Cu2ZnSnS4 (CZTS) and Au–Au dimer (t-CZTS@Au–Au) is fabricated via a colloidal strategy combining templating and seeded growth. On the basis of numerical and experimental results of different related hybrid nanostructures, we show that both the sharpness of the singular feature and the relative position to the reactive site play a pivotal role in optimizing photocatalytic activity. Compared with bare CZTS, the hybrid nanostructure (t-CZTS@Au–Au) exhibits an enhancement of the photocatalytic hydrogen evolution rate by up to ∼9 times. The insights gained from this work might be beneficial for designing efficient composite plasmonic photocatalysts for diverse photocatalytic reactions.",
author = "Tingting Lin and Tianyi Yang and Yuhang Cai and Jingwei Li and Guangxiang Lu and Shuangqun Chen and Yi Li and Liang Guo and Maier, {Stefan A.} and Changxu Liu and Jianfeng Huang",
note = "Funding information: This work was supported by the Venture and Innovation Support Program for Chongqing Overseas Returnees (cx2020107), the Fundamental Research Funds for the Central Universities (2020CDJQY-A072), the Thousand Talents Program for Distinguished Young Scholars and Natural Science Foundation of Chongqing (cstc2021jcyj-msxmX0945). C.L. acknowledges the funding support from Humboldt Research Fellowship from the Alexander von Humboldt Foundation. S.M. acknowledges the funding support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy, EXC 2089/1-390776260, the Solar Energies go Hybrid (SolTech) programme, the EPSRC (EP/W017075/1) and Lee-Lucas Chair in Physics. L G. acknowledges the funding support from the National Natural Science Foundation of China (No. 52176075) and Characteristic Innovation Project of the Department of Education of Guangdong Province (No. 2022KTSCX109). Prof. Tao Yang from the School of Chemistry and Chemical Engineering of Chongqing University is acknowledged for the generous offer of the facility for photocatalytic hydrogen evolution test. Dr. Kai Zhou from the Analytical and Testing Center of Chongqing University is acknowledged for the acquisition of the XPS spectra.",
year = "2023",
month = jun,
day = "14",
doi = "10.1021/acs.nanolett.3c01287",
language = "English",
volume = "23",
pages = "5288--5296",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "11",
}