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Highly Ordered Arrays of Mesoporous Silica Nanorods with Tunable Aspect Ratios from Block Copolymer Thin Films
Author(s) -
Chen A.,
Komura M.,
Kamata K.,
Iyoda T.
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200702010
Subject(s) - nanorod , copolymer , materials science , template , mesoporous silica , mesoporous material , thin film , nanotechnology , chemical engineering , composite material , organic chemistry , polymer , chemistry , catalysis , engineering
Highly ordered arrays of mesoporous silica nanorods with a tunable aspect ratio can be fabricated using PEO m ‐ b ‐PMA(Az) n block copolymer thin films as templates. Together, penetration of the films by the silica precursor and the film thickness control the SiO 2 nanorod growth, and heights of almost 200 nm can be achieved. Inside the SiO 2 nanorods, mesochannels with a diameter of ∼ 2 nm are formed that are aligned along the longitudinal axis of the rod.