Citation: Ruo Zhong WANG, Lang Tao XIAO, Ming Hui YANG, Jun Hui DING, Feng Li QU, Guo Li SHEN. Amperometric Determination of Indole-3-acetic Acid Based on Platinum Nanowires and Carbon Nanotubes[J]. Chinese Chemical Letters, ;2006, 17(12): 1585-1588. shu

Amperometric Determination of Indole-3-acetic Acid Based on Platinum Nanowires and Carbon Nanotubes

1.
Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Agricultural University, Changsha 410028;
2.
Chemistry and Chemical Engineering College, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Uni versity, Changsha 410082

Received Date: 30 August 2006

Fund Project: This work was supported by the NNSF of China (No. 20435010, 30540019, 30670190 and 3060049) and the Natural Science Foundation of Hunan Province (No. 0JJY1003 and 05C306).

Platinum nanowire (PtNW) can be grown by electrodeposition in polycarbonate membrane, with the average diameter of the nanowires about 250 nm. The PtNW and multiwalled carbon nanotubes (CNT) are then dispersed into chitosan (CHIT) solution. The resulting PtNW-CNT-CHIT material brings new capabilities for electrochemical devices by using the synergistic action of the electrocatalytic activity of PtNW and CNT. By dropping the PtNW-CNT-CHIT film onto the glassy carbon (GC) electrode surface, and after evaporationan amperometric sensor for the determination of indole-3-acetic acid (IAA) was developed. The oxidation current of IAA increased significantly at the PtNW-CNT-CHIT film coated GC electrode, in contrast to that at the CNT-CHIT modified GC. The linear response of the sensor is from 50ng/ml to 50 μg/ml with a detection limit of 25 ng/mL.
- Chitosan,
- platinum nanowire,
- glassy carbon,
- indole-3-acetic acid
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