Intersected nonpolar ZnO nanosail arrays aligned epitaxially on LiGaO2 substrate towards enhanced photoelectrochemical responses
Tao Yan,
Yunxiao Min,
Mei‐Yi Lin,
Chenlong Chen,
Chun‐Yu Lee,
Lili Zhao,
Ning Ye,
Mitch M. C. Chou,
Hong Liu,
Weijia Zhou
Affiliations
Tao Yan
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
Yunxiao Min
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
Mei‐Yi Lin
Department of Materials and Optoelectronic Science National Sun Yat‐sen University Kaohsiung 80424 Taiwan
Chenlong Chen
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
Chun‐Yu Lee
Department of Materials and Optoelectronic Science National Sun Yat‐sen University Kaohsiung 80424 Taiwan
Lili Zhao
Institute for Advanced Interdisciplinary Research (IAIR) University of Jinan Jinan 250022 China
Ning Ye
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China
Mitch M. C. Chou
Department of Materials and Optoelectronic Science National Sun Yat‐sen University Kaohsiung 80424 Taiwan
Hong Liu
Institute for Advanced Interdisciplinary Research (IAIR) University of Jinan Jinan 250022 China
Weijia Zhou
Institute for Advanced Interdisciplinary Research (IAIR) University of Jinan Jinan 250022 China
Abstract Intersected nonpolar ZnO nanosail arrays were fabricated epitaxially on Au‐coated LiGaO2 (010) substrate by chemical vapor deposition. In spite of five growth directions, the novel two‐dimensional (2D) nanostructure was confirmed to be single‐crystalline by X‐ray diffraction and transmission electron microscopy. The anisotropy of growth and surface energy in three directions as well as the equivalency of crystallography should be responsible for the formation of intersected 2D nanosail arrays. Compared with those of polar nanoprisms and nonpolar film samples, the nanosail arrays exhibit superior photoelectrochemical performances of photocurrent density (620 µA cm–2 at 0.2 V vs. SCE) and photoconversion efficiency. The enhanced photoelectrochemical responses were attributed to the unique nanostructure with large surface area and high surface‐to‐volume ratio as well as nonpolar characteristic. This work demonstrates a simple, low‐cost and pattern‐free pathway to prepare aligned 2D nanosail arrays for technological applications.
