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Seed Growth of Tungsten Diselenide Nanotubes from Tungsten Oxides
Author(s) -
Kim Hyun,
Yun Seok Joon,
Park Jin Cheol,
Park Min Ho,
Park JiHoon,
Kim Ki Kang,
Lee Young Hee
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201403279
Subject(s) - tungsten diselenide , nanowire , materials science , nanotechnology , chemical vapor deposition , tungsten , diselenide , annealing (glass) , vapor–liquid–solid method , chemical engineering , thin film , tungsten compounds , transition metal , selenium , metallurgy , catalysis , chemistry , organic chemistry , engineering
We report growth of tungsten diselenide (WSe 2 ) nanotubes by chemical vapor deposition with a two‐zone furnace. WO 3 nanowires were first grown by annealing tungsten thin films under argon ambient. WSe 2 nanotubes were then grown at the tips of WO 3 nanowires through selenization via two steps: (i) formation of tubular WSe 2 structures on the outside of WO 3 nanowires, resulting in core (WO 3 )–shell (WSe 2 ) and (ii) growth of WSe 2 nanotubes at the tips of WO 3 nanowires. The observed seed growth is markedly different from existing substitutional growth of WSe 2 nanotubes, where oxygen atoms are replaced by selenium atoms in WO 3 nanowires to form WSe 2 nanotubes. Another advantage of our growth is that WSe 2 film was grown by simply supplying hydrogen gas, where the native oxides were reduced to thin film instead of forming oxide nanowires. Our findings will contribute to engineer other transition metal dichacogenide growth such as MoS 2 , WS 2 , and MoSe 2 .