Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/75970
Title: Dispersion of single-walled carbon nanotubes in water using fluorophore-tagged polypeptide
Authors: Nurmawati, M.H.
Hoh, H.Y.
Lakshminarayanan, R. 
Valiyaveettil, S. 
Keywords: Fluorophores
Polyaspartic acid
Single-walled carbon nanotubes
Issue Date: Aug-2008
Source: Nurmawati, M.H.,Hoh, H.Y.,Lakshminarayanan, R.,Valiyaveettil, S. (2008-08). Dispersion of single-walled carbon nanotubes in water using fluorophore-tagged polypeptide. International Journal of Nanoscience 7 (4-5) : 283-289. ScholarBank@NUS Repository.
Abstract: Polyaspartic acid (PAsp) was tagged with rhodamine isothiocyanate (Rhod) or phenyl isothiocyanate (PITC) and used for adsorption on single-walled carbon nanotubes (SWNTs) to facilitate homogenous dispersion of SWNTs in water. Results from UV-vis, FTIR-spectroscopic and Raman-spectroscopic studies and fluorescence measurements show considerable interaction between SWNTs and fluorophores immobilized on PAsp. The images from atomic force microscopy and transmission electron microscopy also indicate the presence of adsorbed polymers on the surface of SWNTs. The results suggest that the PITC-tagged PAsp is the most effective compound among the three compounds investigated for dispersing and debundling SWNTs in aqueous solutions, and the aqueous solutions are stable for months. © 2008 World Scientific Publishing Company.
Source Title: International Journal of Nanoscience
URI: http://scholarbank.nus.edu.sg/handle/10635/75970
ISSN: 0219581X
Appears in Collections:Staff Publications

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