کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1267464 | 972348 | 2009 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Layer-by-layer assembled carbon nanotube films with molecule recognition function and lower capacitive background current Layer-by-layer assembled carbon nanotube films with molecule recognition function and lower capacitive background current](/preview/png/1267464.png)
Multilayer films of multiwalled carbon nanotubes (MWCNTs) with molecule recognition function were assembled on glassy carbon (GC) electrode with lower capacitive background current by two steps: first, MWCNTs interacted with β-cyclodextrin (β-CD) with the aid of sonication to form β-CD-MWCNTs nanocomposite, then the β-CD-MWCNTs nanocomposite was assembled on GC electrode using layer-by-layer (LBL) method based on electrostatic interaction of positively charged biopolymer chitosan and negatively charged MWCNTs. The assembled β-CD-MWCNTs multilayer films were characterized by scanning electron microscopy (SEM) and cyclic voltammetry. The SEM indicated that the MWCNTs multilayer films with β-CD were somewhat more compact than that of the MWCNTs multilayer films without β-CD. The cyclic voltammetric results indicated that the assembled MWCNTs with β-CD on GC electrode exhibited lower capacitive background current than the assembled MWCNTs without β-CD. The MWCNTs multilayer films with β-CD were studied with respect to the electrocatalytic activity toward dopamine (DA). Compared with the MWCNTs multilayer films without β-CD, the MWCNTs multilayer films with β-CD possesses a much lower capacitive background current and higher electrocatalytic activity in phosphate buffer, which was ascribed to the relatively compact three-dimensional structure of the MWCNTs multilayer films with β-CD and the excellent molecule recognition function of β-CD.
Journal: Bioelectrochemistry - Volume 74, Issue 2, February 2009, Pages 289–294