Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7225034 | Optik - International Journal for Light and Electron Optics | 2018 | 7 Pages |
Abstract
ZnO/reduced graphene oxide (RGO) heterostructures were fabricated using a simple two-step wet chemical technique and post-annealing treatment. ZnO nanoparticles with different sizes (20-200ânm) and shapes were randomly distributed on mono- and/or multi-layered RGO sheets. The microstructures of the ZnO/RGO composites examined using transmission electron microscopy indicated that the heterostructures are polycrystalline in nature, implying the possibilities of diverse defects present in the samples. The photoluminescence spectra examinations revealed the enhancement of defect-level emission peaks observed at a relatively long wavelength ranges (i.e., 779ânm, 666ânm, and 574ânm) as compared with the band to band transition observed at relatively short wavelengths (i.e., 378ânm).
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Authors
Han Gil Na, Taek-Kyun Jung, Min Ryou, Ji-Woon Lee, Soong-Keun Hyun, Sung Yong Kang, Ali Mirzaei, Maryam Bonyani, Kyung-Taek Kim, Ho-Joon Choi, Hyoun Woo Kim, Changhyun Jin,