Wurtzite ZnO nanonail structures have been grown on sapphire substrate by simple thermal evaporation of Zn powder in oxygen ambient. Growth parameters such as growth temperature and oxygen gas flow have been examined for the growth of nanonail structure. It is found that the nanonail structures repeatedly grow under a certain relation between the growth temperature and the oxygen flow. Also, at higher growth temperature, the nanonails grow in the form of branched- structures. The grown ZnO nanonails have hexagonally well-faceted cap and grow mostly perpendicular to the sapphire substrate. Excellent luminescence properties of a strong UV emission peak with negligible green band have been obtained at room temperature. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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Council Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, IndiaCouncil Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, India
Srivatsa, K. M. K.
Chhikara, Deepak
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Council Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, IndiaCouncil Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, India
Chhikara, Deepak
Kumar, M. Senthil
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Council Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, IndiaCouncil Sci & Ind Res CSIR, Phys Energy Harvesting Div, Natl Phys Lab, New Delhi 110012, India
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Physics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, IndiaPhysics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, India
K.M.K. Srivatsa
Deepak Chhikara
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Physics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, IndiaPhysics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, India
Deepak Chhikara
M. Senthil Kumar
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Physics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, IndiaPhysics of Energy Harvesting Division, National Physical Laboratory, Council of Scientific & Industrial Research (CSIR), New Delhi 110012, India