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  • Title: Optical and bio-sensing characteristics of ZnO nanotubes grown by hydrothermal method.
    Author: Rakshit T, Mandal S, Mishra P, Dhar A, Manna I, Ray SK.
    Journal: J Nanosci Nanotechnol; 2012 Jan; 12(1):308-15. PubMed ID: 22523980.
    Abstract:
    ZnO nanostructures were fabricated on copper substrates by hydrothermal method at an optimized growth temperature of -95 degrees C. Structural properties were investigated by field emission scanning electron and transmission electron microscopy. Distinct morphologies were found to be formed at different growth times. The formation of nanotubes mainly involved the initial nucleation followed by the growth of nanorods at 95 degrees C, and then with the increase of dissolution time at room temperature, the preferential chemical dissolution of the metastable Zn-rich [0001] polar surfaces resulted in removing the atoms from the surfaces, thus leading to the thinning of the wall of the nanostructures. Completely hollow ZnO nanotubes could be obtained at a high dissolution time. The room temperature photoluminescence and optical absorption properties of ZnO nanotubes have been studied as a function of dissolution time. The efficacy of ZnO nanotubes for glucose sensing applications has been studied.
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