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Magnetically Induced Large Mesoporous Single‐Domain Monoliths Using a Mineral Liquid Crystal as a Template
Author(s) -
Camerel F.,
Gabriel J.C.P.,
Batail P.
Publication year - 2003
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200304274
Subject(s) - materials science , mesoporous material , porosity , liquid crystal , matrix (chemical analysis) , lyotropic , nanoscopic scale , single crystal , chemical engineering , nanotechnology , polymer , composite material , crystallography , optoelectronics , organic chemistry , liquid crystalline , chemistry , engineering , catalysis
In this paper, we report on how the properties of the suspensions of a lyotropic nematic mineral liquid crystal (MLC) based on V 2 O 5 ribbons are exploited to synthesize single‐domain mesostructured inorganic–inorganic composites, aligned at the centimeter length scale by application of a relatively small magnetic field (0.85 T). In addition, the removal of the mineral template from the inorganic matrix leaves aligned empty channels, fingerprints of the V 2 O 5 ribbons. Large colorless and birefringent mesoporous material is obtained where the orientational order of the channel director has retain the magnetic‐field alignment of its mineral template up to the centimeter length scale within the porous macroscopic silica matrix. A representative material exhibits slit‐like pores with cross‐sectional dimensions of 2 × 20 nm over 600 nm, and has a specific surface area of 207 m 2 g –1 .