Title of article :
A sensor based on polyaniline nanofibers/ionic liquid-functionalized carbon nanotubes composite for electrocatalytic oxidation of guanine
Author/Authors :
Yang, Jie Bio-nanotechnology and Medical Engineering Institute - Jining Medical University, Jining, People’s Republic of China , Yang, Tao College of Chemistry and Molecular Engineering - Qingdao University of Science and Technology, Qingdao, People’s Republic of China , Hou, Shi Feng Chemistry and Biochemistry Department - Montclair State University, Montclair, USA
Abstract :
In this paper, a novel polyaniline (PANI) nanofibers/ionic liquid-functionalized carbon nanotubes (IL-CNTs) composite-modified electrode was prepared, and its application on electrocatalytic oxidation of guanine of sequence-specific DNA was investigated. The surface morphology and the related electrochemical behaviors of the PANI/IL-CNTs composite film were characterized with scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry, respectively. The PANI/IL-CNTs composite showed a good response current toward the direct electrooxidation of ssDNA due to the synergistic effect between PANI nanofibers and IL-CNTs. Based on this, it was adopted as an excellent sensing platform for highly sensitive determination of guanine. The detection limit was 3.1 × 10−9 mol/L.
Keywords :
Ionic liquid , Carbon nanotubes , Electrocatalytic oxidation , Polyaniline nanofibers , Guanine
Journal title :
Astroparticle Physics
