Electrochemical biosensor with electrokinetics-assisted molecular trapping for enhancing C-reactive protein detection

Horn Jiunn Sheen, Bivas Panigrahi, Tsung Rong Kuo, Wei Chen Hsu, Pei Shan Chung, Qiu Zhe Xie, Ching Yu Lin, Yu Sheng Chang, Chih Ting Lin, Yu Jui Fan

研究成果: 雜誌貢獻文章同行評審

15 引文 斯高帕斯(Scopus)


C-Reactive protein (CRP) is an essential biomarker relevant to various disease prognoses. Current biosensors require a significant amount of time for detecting CRP. To address this issue, this work proposes electrokinetic flow-assisted molecule trapping integrated with an impedance biosensor, where a driving signal in terms of a gated sine wave is provided to circularly arranged electrodes which detect proteins. To verify the biosensor's efficacy, protein aggregation on the electrode surface was evaluated through a fluorescence analysis and measurement of the electrochemical impedance spectrum (EIS). The fluorescence analysis with avidin showed that target samples largely accumulated on the electrode surface upon provision of the driving signal. The EIS measurement of CRP accumulation on the electrode surface further confirmed a significant electrokinetic phenomenon at the electrode/electrolyte interface. Even at the low CRP concentration of 10 pg/ml, the proposed device's sensitivity and reliability were as high as 3.92 pg/ml with a signal-to noise ratio (SNR) of ≥3, respectively. In addition, the protein detection time (without considering the preparation time) was minimized to as low as 90 s with the proposed device. This device's advantage is its minimal time consumption, and simple drop-analysis process flow; hence, it was used for monitoring clinical serum samples.
期刊Biosensors and Bioelectronics
出版狀態已發佈 - 8月 15 2022

ASJC Scopus subject areas

  • 生物技術
  • 生物物理學
  • 生物醫學工程
  • 電化學


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