One-step electrodeposition of polyallylamine-functionalized gold nanodendrites and their application in sensing

• Main Authors: Li, Pan, Huang, Tan, Yang, Jie, Wei, Shaohua, Cai, Chenxin, Chen, Yu, Lee, Jong-Min
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2015
• Subjects: DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry
• Online Access: https://hdl.handle.net/10356/107326; http://hdl.handle.net/10220/25616; http://dx.doi.org/10.1002/cplu.201500072
• Institution: Nanyang Technological University

The three-dimensional polyallylamine (PAH)-functionalized gold nanodendrites (PAH-3D-Au-NDs) were successfully synthesized through a simple, one-step electrodeposition method. SEM, TEM, energy-dispersive spectrum mapping, and X-ray photoelectron spectroscopy measurements were used to characterize the morphology, structure, and composition of PAH-3D-Au-NDs. The PAH-3D-Au-NDs were then used as the functional interface to effectively immobilize the ruthenium(III) ion through coordination interactions between the ruthenium(III) ion and PAH. The obtained RuIII/PAH-3D-Au-NDs/Au electrode showed excellent electrocatalytic activity towards iodate reduction. With the use of PAH-3D-Au-NDs, the proposed iodate electrochemical sensor displayed a fast response (less than 3 s), wide linear range (4.99×10−8 to 8.50×10−4 m), and low detection limit (1.66×10−8 m).