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논문 기본 정보

자료유형
학술저널
저자정보
T. Dinakaran (부산대학교) S.-C. Chang (부산대학교)
저널정보
한국분석과학회 분석과학 분석과학 제29권 제1호
발행연도
2016.2
수록면
35 - 42 (8page)

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초록· 키워드

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A new nano-composite carbon ink for the development of disposable dopamine (DA) biosensors based on screen-printed carbon electrodes (SPCEs) is introduced. The method developed uses SPCEs coupled with a tyrosinase modified nano-composite carbon ink. The ink was prepared by an “in-house” procedure with reduced graphene oxide (rGO), Pt nanoparticles (PtNP), and carbon materials such as carbon black and graphite. The rGO-PtNP carbon composite ink was used to print the working electrodes of the SPCEs and the reference counter electrodes were printed by using a commercial Ag/AgCl ink. After the construction of nano-composite SPCEs, tyrosinase was immobilized onto the working electrodes by using a biocompatible matrix, chitosan. The composite of nano-materials was characterized by X-ray photoelectron spectroscopy (XPS) and the performance characteristics of the sensors were evaluated by using voltammetric and amperometric techniques. The cyclic voltammetry results indicated that the sensors prepared with the rGO-PtNP-carbon composite ink revealed a significant improvement in electro-catalytic activity to DA compared with the results obtained from bare or only PtNP embedded carbon inks. Optimum experimental parameters such as pH and operating potential were evaluated and calibration curves for dopamine were constructed with the results obtained from a series of amperometric detections at -0.1 V vs. Ag/AgCl. The limit of detection was found to be 14 nM in a linear range of 10 nM to 100 μM of DA, and the sensor’s sensitivity was calculated to be 0.4 μAμM<SUP>−1</SUP>cm<SUP>−2</SUP>.

목차

Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2016-433-002680542