화학공학소재연구정보센터
Electrochemical and Solid State Letters, Vol.11, No.1, K4-K6, 2008
Direct ascorbic acid detection with ferritin immobilized on single-walled carbon nanotubes
Ferritin protein was noncovalently immobilized onto single-walled carbon nanotubes (SWNTs). This SWNT/ferritin composite was characterized using cyclic voltammetry, UV-visible spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy. The use of the SWNT/ferritin film as an amperometric biosensor was demonstrated by sensing 1.0 mM ascorbic acid in phosphate-buffered saline solution with a sensitivity of 767 mu A/mg. It demonstrated that ferritin protein bound to SWNTs enhances the oxidation reaction of ascorbic acid over 11-fold. (C) 2007 The Electrochemical Society.