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Helical Mesoporous Tantalum Oxide Nanotubes: Formation, Optical Activity, and Applications
Author(s) -
He Yangyang,
Yang Yonggang
Publication year - 2017
Publication title -
the chemical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.61
H-Index - 78
eISSN - 1528-0691
pISSN - 1527-8999
DOI - 10.1002/tcr.201700012
Subject(s) - chirality (physics) , materials science , stacking , nanomaterials , nanotechnology , supramolecular chemistry , nanotube , supramolecular chirality , mesoporous material , self assembly , adsorption , carbon nanotube , chemistry , crystallography , organic chemistry , catalysis , crystal structure , physics , chiral symmetry breaking , quantum mechanics , nambu–jona lasinio model , quark
Nanomaterials with helical morphologies have attracted much attention owing to their potential applications as nanosprings, chirality sensors and in chiral optics. Single‐handed helical Ta 2 O 5 nanotubes prepared through a supramolecular templating approach are described. The handedness is controlled by that of the organic self‐assemblies of chiral low‐molecular‐weight gelators (LMWGs). The chiral LMWGs self‐assemble into single‐handed twisted nanoribbons through H‐bonding, hydrophobic association, and π‐π stacking. The Ta 2 O 5 nanotubes are formed by the adsorption and polycondensation of Ta 2 O 5 oligomers on the surfaces and edges of the twisted organic nanoribbons followed by removal of the template. The optical activity of the nanotubes is proposed to originate from the chiral defects on the inner surfaces of the tubular structures. Single‐handed twisted LiTaO 3 nanotubes can also be prepared using Ta 2 O 5 nanotubes.