Title :
Functionalization of cyclodextrins-incorporated carbon nanotube electrodes for neutral nitrophenol recognition
Author :
Wang, Z.H. ; Luo, G.A. ; Xiao, S.F.
Author_Institution :
Dept. of Chem., Tsinghua Univ., Beijing, China
Abstract :
A novel interface architecture was constructed by a large aggregated pore of carbon nanotube (CNT) captured cyclodextrin (CD) with a small cavity. The isomer recognition ability of various cyclodextrin-incorporated carbon nanotube electrodes (CD-CNT/E) were firstly investigated and characterized systematically by differential pulse voltammetry experiments. Due to the functionalization of CNT with CD, modified electrodes exhibited perfect electrocatalytic response and enhanced recognition ability towards neutral nitrophenol (NP) isomers. The results indicated that α-CD-CNT/E had the best response to p-NP, γ-CD-CNT/E did best for o- N P and HP-β-CD-CNT/E showed excellent response to m- and p-NP, which originate from the porous structure of aggregated CNT, size selective effect and steric hindrance effect of substituent of CD. The electronic properties of CNT coupled with the specific recognition properties would indeed make for an ideal sensor.
Keywords :
carbon nanotubes; electrochemistry; gas sensors; isomerism; organic compounds; voltammetry (chemical analysis); C; cyclodextrins-incorporated carbon nanotube electrodes; differential pulse voltammetry; electrocatalytic response; enhanced recognition ability; functionalization; interface architecture; isomer recognition ability; large aggregated pore; neutral nitrophenol recognition; porous structure; size selective effect; steric hindrance effect; Carbon capture and storage; Carbon nanotubes; Character recognition; Chemical sensors; Chemistry; Electrodes; Mechanical sensors; Molecular biophysics; Nanobioscience; Solvents;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1279081
