Electrochemical Sensing Performances for Uric Acid Detection on Various Amine Adlayers Used in Immobilizing Reduced Graphene Oxide |
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| Authors: | Sumi Park Shinjae Hwang Shigeori Takenaka Kyuwon Kim |
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| Institution: | 1. Department of Chemistry, Incheon National University, 12‐1 Songdo‐dong, Yeonsu‐gu, Incheon 406‐772, Republic of Korea;2. Department of Applied Chemistry, Kyushu Institute of Technology, 1‐1 Sensui‐cyo, Tobata‐ku, Fukuoka 804‐8550, Japan |
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| Abstract: | We investigated an influence of amine adlayer on electrochemical sensing performances for uric acid detection on reduced graphene oxide (RGO)‐decorated indium‐tin oxide electrode surfaces. Various amine‐terminated molecules including aminoethyl aryldiazonium cation, 2,2′‐(ethylenedioxy)bis(ethylamine), 3‐aminopropyltriethoxysilane, polyethyleneimine were introduced as adlayers to electrostatically immobilize RGO on the electrode surfaces. The anodic oxidation current of uric acid was observed on the various surfaces with differential pulse voltammetry. The current was highly enhanced by electrocatalytic activity of RGO. The sensing performances including linearity, sensitivity, limit of detection, and correlation coefficient were measured and compared. The adlayer with 3‐aminopropyltriethoxysilane showed the best performances on the RGO‐modified surface. |
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| Keywords: | Amine adlayer Reduced graphene oxide Uric acid Ascorbic acid Electrocatalysis |
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