Morphology-controlled assembly of ZnO nanostructures: a bioinspired method and visible luminescence.
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.
Begum
Gousia
G
Nanomaterials Laboratory, Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, Hyderabad, India.
Manorama
Sunkara V
SV
Singh
Shashi
S
Rana
Rohit Kumar
RK
D040761:Biomimetic Materials / Q000737:chemistry*; D002384:Catalysis; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D049449:Luminescence; D008903:Minerals / Q000737:chemistry; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry; D011073:Polyamines / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D015034:Zinc Oxide / Q000737:chemistry*
D008903:Minerals; D010455:Peptides; D011073:Polyamines; D015034:Zinc Oxide