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Synthesis of Biomorphic ZnO Nanostructures by Using the Cetyltrimethylammonium Bromide Modified Silk Templates
Author(s) -
Li Jia,
Kwong FungLuen,
Zhu Jiangtao,
Ng Dickon H. L.
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03984.x
Subject(s) - bromide , crystallite , silk , nanostructure , pulmonary surfactant , chemical engineering , porosity , annealing (glass) , materials science , template , micelle , nanometre , polyester , molecule , nanotechnology , chemistry , composite material , inorganic chemistry , organic chemistry , aqueous solution , engineering , metallurgy
We report a biotemplating approach to produce porous ZnO nanostructures. In the synthesis, a biotemplate cut from silkworm cocoon was treated with the cetyltrimethylammonium bromide (CTAB) surfactant and soaked in the Zn(NO 3 ) 2 ·6H 2 O solution before it was annealed at ∼650°C in air. The biotemplate was transformed to a hierarchically interwoven network with hollow fibers composing of ZnO nanometer‐sized crystallites. During their formation, micelles of the CTAB molecules attached to the silk transformed the surface charge of the fibers from negative to positive. Consequently, the negatively charged Zn(OH) 4 2− ions self‐assembled onto the silk fibers through electrostatic interaction. Further annealing eliminated the organic components of the fibers resulted in a porous ZnO network.