Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Capacitance Enhancement and Evaluation of Gold-Deposited Carbon Nanotube Film Ion-Selective Electrode

금 입자 증착된 탄소나노튜브의 커패시턴스 증가 및 박막형 이온 선택성 전극으로서의 특성 평가

  • Do Youn Kim (Major of Materials Engineering, Pukyong National University) ;
  • Hanbyeol Son (Major of Materials Engineering, Pukyong National University) ;
  • Hyo-Ryoung Lim (Major of Human Biocovergence, Pukyong National University)
  • 김도연 (부경대학교 재료공학과) ;
  • 손한별 (부경대학교 재료공학과) ;
  • 임효령 (부경대학교 휴먼바이오융합전공)
  • Received : 2023.08.14
  • Accepted : 2023.08.23
  • Published : 2023.08.28
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Abstract

Small-film-type ion sensors are garnering considerable interest in the fields of wearable healthcare and home-based monitoring systems. The performance of these sensors primarily relies on electrode capacitance, often employing nanocomposite materials composed of nano- and sub-micrometer particles. Traditional techniques for enhancing capacitance involve the creation of nanoparticles on film electrodes, which require cost-intensive and complex chemical synthesis processes, followed by additional coating optimization. In this study, we introduce a simple one-step electrochemical method for fabricating gold nanoparticles on a carbon nanotube (Au NP-CNT) electrode surface through cyclic voltammetry deposition. Furthermore, we assess the improvement in capacitance by distinguishing between the electrical double-layer capacitance and diffusion-controlled capacitance, thereby clarifying the principles underpinning the material design. The Au NP-CNT electrode maintains its stability and sensitivity for up to 50 d, signifying its potential for advanced ion sensing. Additionally, integration with a mobile wireless data system highlights the versatility of the sensor for health applications.

Keywords

Acknowledgement

이 논문은 부경대학교 자율창의학술연구비(2021년)에 의하여 연구되었음.

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