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Citation: LUO Ming-Rong, WANG Liang-Liang, ZHANG Ya-Jing, ZHAO Shuang. A Non-Enzymatic Glucose Sensor Based on Polydopamine/Cu Microparticles Self-assembled Multilayer Films[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(6): 882-887. doi: 10.11895/j.issn.0253-3820.150853 shu

A Non-Enzymatic Glucose Sensor Based on Polydopamine/Cu Microparticles Self-assembled Multilayer Films

College of Sciences, Northeastern University, Shenyang 110004, China

Received Date: 26 October 2015
Revised Date: 17 February 2016

Fund Project: This work was supported by the Fundamental Research Funds for the Central Universities (No. N130405004) and the Science and Technology Projects of Liaoning Province (Nos. 2011225003, 2010220003-1)

Figures(8)

A highly stable multilayer film modified glassy carbon electrode (GCE) containing polydopamine (PDA) and Cu microparticles was fabricated by layer-by-layer self-assembly technique. The fabrication process was based on the self-polymerization of dopamine and electroless deposition of Cu microparticles on PDA coating. The fabrication process of multilayer films was characterized by UV-Vis spectra. The electrochemical performance of GCE/(PDA/Cu)_n modified electrode for glucose detection was investigated by cyclic voltammetry and amperometric current-time curve under alkaline conditions. At detection potential of 0.35 V, the GCE/(PDA/Cu)₄ modified electrode presented a linear range of 0.5-9.0 mmol/L with a detection limit of 5.8 μmol/L (S/N=3). Moreover, the sensitivity of the modified electrode was tunable by controlling the number of bilayers of the multilayer films. The modified electrode showed highly selective, stable and fast amperometric sensing of glucose. It was applied to determine glucose in human blood serum with satisfactory results.
- Layer-by-layer self-assembly,
- Non-enzymatic sensor,
- Glucose,
- Electrocatalysis,
- Dopamine autopolymer
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