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Preparation of Single‐Handed Helical Carbon/Silica and Carbonaceous Nanotubes by Using 4,4′‐Biphenylene‐Bridged Polybissilsesquioxane
Author(s) -
Zhang Chuanyong,
Li Yi,
Li Baozong,
Yang Yonggang
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201300798
Subject(s) - carbon nanotube , materials science , biphenylene , raman spectroscopy , thermogravimetric analysis , carbonization , chemical engineering , nanotechnology , chirality (physics) , carbon fibers , amorphous carbon , composite material , scanning electron microscope , polymer , optics , physics , phenylene , chiral symmetry breaking , quark , composite number , nambu–jona lasinio model , engineering , quantum mechanics
Single‐handed, helical, 4,4′‐biphenylene‐bridged polybissilsesquioxane nanotubes were prepared by using the self‐assemblies of a pair of chiral low‐molecular‐weight gelators as templates. Single‐handed, helical, carbon/silica nanotubes were obtained after carbonization of the self‐assemblies, and single‐handed helical carbonaceous nanotubes were then obtained by removal of silica with aqueous HF. Samples were characterized by using field‐emission SEM, TEM, X‐ray diffraction, thermogravimetric analysis, Raman spectroscopy , and circular dichroism. The polysilsesquioxane and carbonaceous structures exhibited optical activity. The walls of the carbon/silica and carbonaceous nanotubes were predominantly amorphous carbon. The surface area of the left‐handed, helical, carbonaceous nanotubes was 1439 m 2 g −1 , and such materials have potential applications as catalyst supports, chirality sensors, supercapacitor electrodes, and adsorbents.