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Growth of Nanograins in Electrospun ZnO Nanofibers
Author(s) -
Park Jae Young,
Kim Sang Sub
Publication year - 2009
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.1551-2916.2009.03119.x
Subject(s) - nanofiber , crystallite , materials science , calcination , electrospinning , transmission electron microscopy , scanning electron microscope , microstructure , chemical engineering , polyvinyl alcohol , raman spectroscopy , grain growth , activation energy , nanotechnology , composite material , polymer , metallurgy , chemistry , organic chemistry , optics , physics , engineering , catalysis
ZnO nanofibers were synthesized using an electrospinning method with polyvinyl alcohol and zinc acetate as precursor materials. The effects of the processing parameters on the microstructure of the synthesized ZnO nanofibers were investigated. X‐ray diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy showed that the ZnO nanofibers were distributed uniformly over the Si substrates and had a polycrystalline nature. Individual nanofibers consisted of nanograins. Interestingly, the nanograins coalesced and grew under higher calcination temperatures and longer calcination times. The activation energy for grain‐growth was estimated to be 13.126 kJ/mol, and the dominant growth mechanism was most likely to be related to lattice diffusion in pore control mode.