Highly Sensitive Electrochemical Dopamine Sensor from Poly(diallyldimethylammonium chloride)-Functionalized Graphene Nanoribbon/Gold Nanoparticle Nanocomposite

作者：Liu, Xing-Pei; Tong, Jun; Yuan, Zheng; Yang, Ying; Mao, Chang-Jie^*; Niu, He-Lin; Jin, Bao-Kang; Zhang, Sheng-Yi

来源：Journal of Nanoscience and Nanotechnology, 2016, 16(2): 1645-1649.

DOI：10.1166/jnn.2016.10738

• Electrochemical
• GONRs/PDDA/AuNPs Nanocomposites
• Biosensor

A novel graphene oxide nanoribbon/poly(diallyldimethylammonium chloride)/gold nanoparticle (GONR/PDDA/AuNP) nanocomposite was synthesized successfully and used for the sensitive detection of dopamine. The GONR/PDDA/AuNP nanocomposite was characterized by transmission and scanning electron microscopy. The electrochemical sensor based on GONR/PDDA/AuNP nanocomposite was studied by cyclic voltammetry and electrochemical impedance spectroscopy. Experimental parameters such as GONR/PDDA concentration, volume ratio of GONR/PDDA to AuNP, scan rates, and pH were studied to investigate their effect on peak currents. Under optimal conditions, the GONR/PDDA/AuNP-based sensor exhibited excellent electrocatalytic activity for the detection of dopamine with a wide linear range from 9.99x10(-8) to 8.69x10(-4) M and a low detection limit of 3.33x10(-8) M. Moreover, the proposed sensor exhibits high sensitivity, good reproducibility, and stability, and could therefore potentially be applied in other bioanalytical systems.

• 出版日期2016-2
• 单位安徽大学