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標題: Dispersion of carbon nanotubes in low pH aqueous solutions by means of alumina-coated silica nanoparticles
作者: Tsai, Y.C.
Chiu, C.C.
Tsai, M.C.
Wu, J.Y.
Tseng, T.F.
Wu, T.M.
Hsu, S.F.
關鍵字: stabilization mechanism;weight fraction;graphite;solubilization;electrodes;biosensors;behavior;glucose;nafion;halos
Project: Carbon
期刊/報告no:: Carbon, Volume 45, Issue 14, Page(s) 2823-2827.
A novel noncovalent and inorganic method was used to disperse multiwalled carbon nanotubes (MWCNTs) in aqueous solutions through alumina-coated silica (ACS) nanoparticle halos. MWCNTs were directly dispersed into a highly charged ACS nanoparticle aqueous solution without functionalization of their surfaces. The dispersed MWCNTs were characterized by transmission electron microscopy and atomic force microscopy. Raman spectroscopy of MWCNTs prepared from dispersion in the ACS solution revealed reduced bundling compared to the corresponding untreated MWCNTs. The characteristic Raman peak at about 1570 cm(-1), corresponding to the G band, shifted to a higher wavenumber with a narrower peak. It was possible to disperse up to 20 mg/mL of MWCNTs in a 1 wt% ACS nanoparticle aqueous solution at pH 2. This homogeneous MWCNT-ACS aqueous solution was stable for weeks after ultrasonication. (C) 2007 Elsevier Ltd. All rights reserved.
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2007.08.034
Appears in Collections:化學工程學系所

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