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Growth of Well‐Aligned γ ‐MnO 2 Monocrystalline Nanowires through a Coordination‐Polymer‐Precursor Route
Author(s) -
Xiong Yujie,
Xie Yi,
Li Zhengquan,
Wu Changzheng
Publication year - 2003
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.200390189
Subject(s) - nanowire , coordination polymer , polymer , materials science , hydrothermal circulation , monocrystalline silicon , nanotechnology , crystal structure , crystallography , coordination number , chemical engineering , chemistry , organic chemistry , optoelectronics , ion , composite material , silicon , engineering
A new coordination‐polymer‐precursor route has been developed to synthesize nanowires under hydrothermal conditions. In the present work, well‐aligned γ ‐MnO 2 nanowires, growing along the [0 0 2] axis, have successfully been prepared by selecting an appropriate coordination polymer [{Mn(SO 4 )(4,4′‐bpy)(H 2 O) 2 } n ] as precursor. In comparison with the experimental results from other coordination‐polymer precursors, it is found that only [{Mn(SO 4 )(4,4′‐bpy)(H 2 O) 2 } n ] is appropriate for the formation of γ ‐MnO 2 crystal lattices during the process of oxidization. The IR absorption spectra of as‐obtained precipitates at different reaction intervals minutely describe the reaction process, due to the different coordination abilities of ligands in the coordination polymer. More evidence about the mechanism will be further explored in the future study. Further observations show the ordered alignment of nanowires' tops and such well‐aligned nanowires provide more possible applications in lithium batteries.