<i>β</i>-cyclodextrin Covalently Functionalized Single-Walled Carbon Nanotubes: Synthesis, Characterization and a Sensitive Biosensor Platform

Abstract

In this study, we presented the preparation of β-cyclodextrin (β-CD) covalently functionalized single-walled carbon nanotubes (SWCNTs) and its application in modifying the solid glass carbon electrode (GCE). Cyclic voltammetry (CV) method was employed to evaluate the performance of the modified GCE. Solubility experiment indicated the conjugation of SWCNTs and β-CD, SWCNTs-β-CD with 8 wt% β-CD content could be well dispersed in water. High-resolution transmission electron microscopy (HRTEM) demonstrated that the aggregated SWCNTs bundle were effectively exfoliated to small bundle, even individual tube. The β-CD component was grafted on the side walls as well as tips of SWCNTs, and the grafted β-CD component was not uniformly coated on the surface of SWCNTs. The CV measurements indicated the performance of the GCE modified by SWCNTs-β-CD was better than that of the GCE modified by the hybrid of SWCNTs

Covalent Immobilization of Amino-β-Cyclodextrins on Glassy Carbon Electrode in Aqueous Media

“…As compared with the gold case, the number of reports of immobilization of CDs on carbon materials is not as high. However, some reports have shown that CDs can be either adsorbed on carbon-based nanomaterials having high surface area and high porosity as activated carbon (AC), 18 immobilized on the surface of carbon-coated cobalt nanomagnets, 19 covalently immovilized at single-walled carbon nanotubes 20 or electrochemically deposited as a film on carbon paste. 21 The grafting of native β-CDs has been also investigated using glutaraldehyde and 1,4-phenylene diisocyanate as organic linker molecules on AC, 22 however, this latter procedure is very time-consuming due to the many hours involved in the various steps of mixing.…”

β-Cyclodextrin decorated nanocellulose: a smart approach towards the selective fluorimetric determination of danofloxacin in milk samples

“…8 This class of cyclic oligosaccharides consists of six, seven and eight glucopyranose units to form α-, βand γ-CD. 16 It is worth mentioning that, although some examples of CD coupled with nanomaterials have already been published, [17][18][19][20][21] no literature about NC decorated with CD has been reported until now. In particular, this type of macrocycle has been used in separation science [9][10][11][12][13][14] to distinguish enantiomers 15 based on the selective molecular interaction afforded by the CD cavities for trapping a target molecule from a complex matrix.…”

“…However, other applications such as the antibacterial activity of modified cellulose fibers with β-cyclodextrin have recently been published. 16 It is worth mentioning that, although some examples of CD coupled with nanomaterials have already been published, [17][18][19][20][21] no literature about NC decorated with CD has been reported until now.…”