Polymerized ionic liquid-wrapped carbon nanotubes: the promising composites for direct electrochemistry and biosensing of redox protein.
Polymerized ionic liquid-wrapped carbon nanotubes (PIL-CNTs) were firstly designed for direct electrochemistry and biosensing of redox proteins. The CNTs were coated successfully with polymerized ionic liquid (PIL) layer, as verified by transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy. The PIL-CNTs were dispersed better in water and showed superior electrocatalysis toward O(2) and H(2)O(2) comparing to pristine CNTs and the mixture of IL monomer and CNTs. With glucose oxidase (GOD) as a protein model, the direct electrochemistry of the redox protein was investigated on the PIL-CNTs modified glassy carbon (GC) electrode and excellent direct electrochemical performance of GOD molecules was observed. The proposed biosensor (GOD/PIL-CNTs/GC electrode) displayed good analytical performance for glucose with linear response up to 6mM, response sensitivity of 0.853 microA mM(-1), good stability and selectivity.
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Lushan Road, Changsha 410082, PR China.
Chunhui
C
Xiao
Xiaochen
X
Chu
Bohua
B
Wu
Haili
H
Pang
Xiaohua
X
Zhang
Jinhua
J
Chen
D001234:Aspergillus niger / Q000201:enzymology; D015374:Biosensing Techniques / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D005947:Glucose / Q000032:analysis* / Q000378:metabolism; D005949:Glucose Oxidase / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000378:metabolism; D052578:Ionic Liquids / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism; D012680:Sensitivity and Specificity
D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D005947:Glucose; D010100:Oxygen