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Synthesis, characterization and cytotoxicity of surface amino-functionalized water-dispersible multi-walled carbon nanotubes

Authorized Users Only
2009
Authors
Vuković, G.
Marinković, Aleksandar D.
Obradović, Maja
Radmilović, V.
Čolić, M.
Aleksić, Radoslav
Uskoković, Petar S.
Article (Published version)
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Abstract
Surface functionalization of multi-walled carbon nanotubes (MWCNTs), with amino groups via chemical modification of carboxyl groups introduced on the nanotube surface, using O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (N-HATU) and N,N-diisopropylethylamine (DIEA) is reported. The N-HATU coupling agent provides faster reaction rate and the reaction occurs at lower temperature compared to amidation and acylation-amidation chemistry. The amines, 1,6-hexanediamine (HDA), diethylenetriamine (DETA), triethylenetetramine (TETA) and 1,4-phenylenediamine (PDA) were used. The resulting materials were characterized with different techniques such as FTIR, XRD, elemental analysis, TGA, TEM, UV-vis spectroscopy and cyclic voltammetry. MWCNTs functionalized with PDA posses the best dispersibility and electron transfer properties in comparison to the others amines. Functionalized MWCNTs, at the concentrations between 1 and 50 μg ml-1, were not cytotoxic for the fibrobla...st L929 cell line. However, the concentrations of MWCNTs higher of 10 μg ml-1 reduced cell growth and this effect correlated positively with the degree of their uptake by L929 cells.

Keywords:
Amino-functionalization / Carbon nanotubes / Cyclic voltammetry / cytotoxicity
Source:
Applied Surface Science, 2009, 255, 18, 8067-8075
Publisher:
  • Elsevier Science Bv, Amsterdam
Projects:
  • Sinteza funkcionalnih materijala sa kontrolisanom strukturom na molekularnom i nano nivou (RS-142006)

DOI: 10.1016/j.apsusc.2009.05.016

ISSN: 0169-4332

WoS: 000267469500039

Scopus: 2-s2.0-67649097074
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/584
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