Simultaneous voltammetric determination for DA, AA and NO(2)(-) based on graphene/poly-cyclodextrin/MWCNTs nanocomposite platform
Zhang, Y; Yuan, R; Chai, Y; Li, W; Zhong, X; Zhong, H
| HERO ID | 901330 |
|---|---|
| In Press | No |
| Year | 2011 |
| Title | Simultaneous voltammetric determination for DA, AA and NO(2)(-) based on graphene/poly-cyclodextrin/MWCNTs nanocomposite platform |
| Authors | Zhang, Y; Yuan, R; Chai, Y; Li, W; Zhong, X; Zhong, H |
| Journal | Biosensors and Bioelectronics |
| Volume | 26 |
| Issue | 9 |
| Page Numbers | 3977-3980 |
| Abstract | In the present work, graphene sheets (GS) and multiwall carbon nanotubes (MWCNTs) were dispersed in the mixed solution of cyclodextrin (CD) and cyclodextrin prepolymer (pre-CD) and were used as modifier to fabricate chemical modified electrode to simultaneous detect dopamine (DA), ascorbic acid (AA) and nitrite (NO(2)(-)). CD cross-linked pre-CD (CDP) displays excellent film forming ability, which made the electrode stable. Comparing with CDP-GS, CDP-MWCNTs and CDP-GS-MWCNTs modified electrodes, the CDP-GS-MWCNTs displays higher catalytic activity and selectivity toward the oxidation of DA, AA and NO(2)(-), revealing that MWCNTs effectively inhibited the stacking of individual GS and enhanced the utilization of GS based composites. The host-guest chemical reaction ability of CD and π-π stacking interaction between detected molecules and GS-MWCNTs surface were considered as the main reasons of the successfully simultaneous detection of DA, AA and NO(2)(-). Cyclic voltammetry (CV), scanning electron microscopy (SEM) and different pulse voltammetry (DPV) were employed to characterize the biosensor. The linear response range for AA, DA and NO(2)(-) were 5μM-0.48mM, 0.15-21.65μM and 5μM-6.75mM, respectively and the detection limits were 1.65μM, 0.05μM and 1.65μM. |
| Doi | 10.1016/j.bios.2011.03.017 |
| Pmid | 21497078 |
| Wosid | WOS:000291178200042 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: Biosensors & bioelectronics ISSN: 1873-4235 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Graphene sheets; Multiwall carbon nanotubes; Cyclodextrin; Dopamine; Ascorbic acid; Nitrite |
| Is Qa | No |