Direct Ascorbic Acid Detection with Ferritin Immobilized on Single-Walled Carbon Nanotubes | Zendy

Chonlada Dechakiatkrai | Zendy; Jun Chen | Zendy; Carol Lynam | Zendy; Kwang Min Shin | Zendy; Sung Joong Kim | Zendy; Sukon Phanichphant | Zendy; Gordon G. Wallace | Zendy

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Direct Ascorbic Acid Detection with Ferritin Immobilized on Single-Walled Carbon Nanotubes

Author(s) -

Chonlada Dechakiatkrai,

Jun Chen,

Carol Lynam,

Kwang Min Shin,

Sung Joong Kim,

Sukon Phanichphant,

Gordon G. Wallace

Publication year - 2007

Publication title -

electrochemical and solid-state letters

Language(s) - English

Resource type - Journals

eISSN - 1944-8775

pISSN - 1099-0062

DOI - 10.1149/1.2795834

Subject(s) - ascorbic acid , ferritin , raman spectroscopy , carbon nanotube , amperometry , materials science , cyclic voltammetry , high resolution transmission electron microscopy , biosensor , nuclear chemistry , electrochemistry , transmission electron microscopy , nanotechnology , chemistry , electrode , biochemistry , food science , physics , optics

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 μA/mg. It demonstrated that ferritin protein bound to SWNTs enhances the oxidation reaction of ascorbic acid over 11-fold.

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