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Synthesis of Highly Crystalline Hollow TiO 2 Fibers Using Atomic Layer Deposition on Polymer Templates
Author(s) -
Choi SunWoo,
Park Jae Young,
Lee Chongmu,
Lee Jae Gap,
Kim Sang Sub
Publication year - 2011
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.1551-2916.2011.04600.x
Subject(s) - crystallinity , template , materials science , polymer , layer (electronics) , spinning , deposition (geology) , chemical engineering , composite material , atomic layer deposition , nanotechnology , sediment , engineering , biology , paleontology
A novel approach is applied to fabricate highly crystalline hollow TiO 2 fibers with a uniform wall thickness. In this approach, first the polymer fibers of ̃240 nm in diameter were synthesized by the electro‐spinning technique as sacrificial templates. Second, TiO 2 shell layers of ̃75 nm in thickness were deposited on these templates using the atomic layer deposition technique. After the selective removal of polymer templates by suitable heat treatments (>500°C), highly crystalline hollow TiO 2 fibers were successfully produced. This two‐step process seems to easily be extended to synthesizing other hollow oxide fibers with good crystallinity and well‐controlled wall thickness.