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Evaporation‐Induced Alignment of Cylindrical Mesopores in TiO 2 Thin Films
Author(s) -
Zhang Yu,
Wang John
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.1551-2916.2009.03433.x
Subject(s) - mesoporous material , materials science , thin film , polystyrene , evaporation , ethylene oxide , chemical engineering , styrene , oxide , thermal stability , nanotechnology , copolymer , composite material , organic chemistry , polymer , catalysis , chemistry , physics , metallurgy , engineering , thermodynamics
Hexagonally packed cylindrical mesopores that are vertically aligned at the surface of mesoporous TiO 2 thin film are formed by self‐assembly of the hydrolyzed titanium alkoxides in the presence of poly(styrene‐ b ‐ethylene oxide) building blocks. The mesoporous thin film exhibits a high degree of lateral ordering and thermal stability. Long‐range lateral ordering and orientation of mesopores at the TiO 2 film surface arise from a strong unfavorable interaction between the polystyrene and poly(ethylene oxide) building blocks, together with the cooperative assembling between the building blocks and inorganic species in association with the directionality of solvent evaporation.