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Formation of Hollow Helicoids in Mesoporous Silica: Supramolecular Origami
Author(s) -
Yang S. M.,
Sokolov I.,
Coombs N.,
Kresge C. T.,
Ozin G. A.
Publication year - 1999
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/(sici)1521-4095(199912)11:17<1427::aid-adma1427>3.0.co;2-3
Subject(s) - materials science , supramolecular chemistry , mesoporous silica , mesoporous material , hexagonal crystal system , nanotechnology , helicoid , chemical engineering , crystallography , crystal structure , organic chemistry , geometry , chemistry , catalysis , mathematics , engineering
Siliceous hollow helicoids (Archimedian screw shapes) with spiraling mesoscale channels are the result of a new way of controlling the growth and form of hexagonal mesoporous silica. These novel helicoids (see Figure) are produced when a patch of the hexagonal silicate liquid‐crystal film contracts on hydrolytic polycondensation, triggering “roll‐up”. A supramolecular Origami theoretical model is invoked to rationalize hollow helicoid formation.