Facile synthesis of ZnO nanostructures and investigation of structural and optical properties |
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| Affiliation: | 1. School of Chemical Engineering & Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yan''an Street, Changchun, Jilin, 130012, China;2. School of Materials Science and Engineering, Changchun University of Technology, 2055 Yan''an Street, Changchun, Jilin, 130012, China;3. School of Chemical and life Sciences & Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yan''an Street, Changchun, Jilin, 130012, China;1. Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis, Tunis-El Manar University, Tunis-El Manar 2092, Tunisia;2. IES, Université de Montpellier 2, France;1. Deparment of Physics, Veltech Hightech Dr.Rangarajan Dr.Sakunthala Engineering College, Avadi, Tamil Nadu 600 062, India;2. Centre for Crystal Growth, School of Advanced Sciences, VIT University, Vellore, Tamil Nadu 632 014, India;3. UGC-DAE Consortium for Scientific Research, Kalpakkam Node, Kokilamedu 603 104, India;4. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452 001, India;5. Department of Physics, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620 015, India;6. Department of Physics, St. Joseph''s College, Tiruchirappalli, Tamil Nadu 620 002, India;1. Department of Physics, Bishop Moore College, Mavelikara, Alappuzha, Kerala 690110, India;2. Department of Chemistry, Nanjing University of Science and Technology, Xialingwei 200, Nanjing, People''s Republic of China;3. Department of Physics, University of Helsinki, Finland;4. Department of Physics, Government Arts College for Women (Autonomous), Pudukottai, India |
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| Abstract: | ZnO nanostructures were synthesized by chemical bath deposition method, using zinc nitrate Zn(NO3)2] and hexa-methylene-tetra-amine (HMT),C(H2)6N4] as precursors. Controlled size and shape evolution of ZnO nanostructures were achieved by changing the HMT concentration from 0.025 M to 0.1 M, whereas Zn(NO3)2 concentration kept constant. X-ray diffraction (XRD) and Raman study confirmed the formation of single crystalline, hexagonal wurtzite ZnO structure. Sharp peaks in Raman spectra, corresponding to E2(low) and E2(high) referred to wurtzite structure with higher order of crystallinity. Transmission electron microscopy (TEM) revealed that the shape and size of the nanostructures reduced, with increasing concentration of HMT. Further, effect of structure's size was observed in the band gap (shift). Photoluminescence study showed two peaks at ~ 380 nm and ~ 540 nm corresponding to the band to band transition and defect transitions. Modifications of properties are explained in detail on the basis of shape and size change of the structures and possible mechanism is discussed. |
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