Electrochemical sensor based on laser-induced graphene and CeO2 for sensitive and selective dopamine detection

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-01-15 DOI:10.1016/j.jelechem.2024.118865

Chanwon Park , Hyejin Rhyu , Suhun Jo , Myung Hyun Kang , Yun Chan Kang , Wooseok Song , Sun Sook Lee , Jongsun Lim , Sung Myung

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引用次数: 0

Abstract

In this study, we developed a highly sensitive electrochemical sensor for detecting dopamine (DA) using a simple and fast CO₂ laser scribing technique. The UV/Ozone-treated polyimide (PI) film coated with CeO₂ precursor was scribed by the CO₂ laser to synthesize the electrochemical sensor (UV-LC). The CeO₂ particles were well anchored on the laser-induced graphene (LIG) surface, enhancing the electrochemical surface area (ESA) from 1.31 cm² in LIG to 3.35 cm² in UV-LC. Also, the CeO₂ particles were affected by the reducing charge transfer resistance (R_ct) from 1281 Ω to 761.8 Ω which is the LIG and UV-LC value, respectively. UV-LC demonstrated a linear response to DA concentrations from 0 to 10 μM, with a sensitivity of 25.09 μA/μM·cm² and a detection limit (LOD) of 0.38 μM which is the higher and lower value compared to other metal oxide-based DA sensors. Additionally, UV-LC exhibited good selectivity with glucose (GU), ascorbic acid (AA), and uric acid (UA) being less than 55 % of the DA current response. These results suggest this sensor is highly suitable for DA detection in biosensing applications. Furthermore, this simple and rapid fabrication process opens possibilities for various electrochemical devices.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.