Growth and characterization of ZnO (microdisks)/W18O49 (nanorods) heterostructures |
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| Institution: | 1. Key Laboratory of Photosensitive Materials and Device of Liaoning Province, Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, 116600, China;2. School of Science, Dalian Maritime University, 116026, China;1. Department of Chemistry, National Institute of Technology, Silchar, Silchar, 788010, Assam, India;2. Department of Chemistry, PSG College of Technology, Coimbatore, Tamilnadu, 641004, India;1. Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China;2. School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore;3. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, United States |
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| Abstract: | ZnO (microdisks)/W18O49 (nanorods) heterostructures were grown on a Si(111) substrate using a thermal evaporation method. X-ray diffraction of the products indicated two separate phases belong to monoclinic W18O49 and hexagonal ZnO structures. Field emission scanning electron microscope (FESEM) images showed W18O49 nanorods with approximately uniform diameters (∼20 nm) on ZnO microdisk. Field emission Auger electron spectroscopy (FEAES) also confirmed two separate elemental characteristics of W18O49 and ZnO. The Raman and photoluminescence (PL) studies demonstrated that the ZnO microdisks have a good crystallinity with excellent optical properties. The Raman results of the ZnO(microdisks)/W18O49(nanorods) heterostructures indicated only W18O49 structure and the PL results of the heterostructures showed two peaks, one in the ultraviolet region at 374 nm and another in the visible region at 500 nm, which both belong to W18O49 nanorods. |
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