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Morphology‐Controlled Assembly of ZnO Nanostructures: A Bioinspired Method and Visible Luminescence
Author(s) -
Begum Gousia,
Manorama Sunkara V.,
Singh Shashi,
Rana Rohit Kumar
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200800129
Subject(s) - luminescence , photoluminescence , nanostructure , nanoparticle , materials science , morphology (biology) , nanotechnology , zinc , mineralization (soil science) , chemical engineering , visible spectrum , photochemistry , chemistry , optoelectronics , organic chemistry , nitrogen , genetics , engineering , metallurgy , biology
Abstract In a bioinspired methodology, positively charged polypeptides and polyamines directly catalyse ZnO mineralization under “green” conditions of room temperature and neutral pH. The polyamines not only act as mineralizing agents for the formation of ZnO nanoparticles, but also self‐assemble the nanoparticles to form spindle‐like morphologies at these very ambient conditions. Both the directional growth of ZnO and its luminescent property have a pH dependency. At higher pH, the ZnO shape changes to a rodlike morphology that exhibits green photoluminescence with different intensity than that for ZnO spindles.