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An Efficient Route to Mesoporous Silica Films with Perpendicular Nanochannels
Author(s) -
Nagarajan S.,
Li M.,
Pai R. A.,
Bosworth J. K.,
Busch P.,
Smilgies D.M.,
Ober C. K.,
Russell T. P.,
Watkins J. J.
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.200701766
Subject(s) - materials science , styrene , mesoporous silica , mesoporous material , substrate (aquarium) , chemical engineering , scanning electron microscope , perpendicular , supercritical carbon dioxide , nanotechnology , supercritical fluid , copolymer , composite material , organic chemistry , polymer , catalysis , chemistry , oceanography , geometry , mathematics , engineering , geology
Mesoporous silica films with cylindrical pores oriented normal to the substrate are prepared by selective deposition of silica within the poly(hydroxy styrene) domains of poly(α‐methyl styrene‐ b ‐ hydroxy styrene) template films using supercritical carbon dioxide as a delivery medium. Atomic force microscopy, electron microscopy, and grazing incidence small angle X‐ray scattering (see figure) studies confirm the vertical alignment of the cylindrical pores.