探討電沉積奈米金或奈米鈀對碳纖維紙電極電化學特性的影響

Abstract

碳纖維紙已被證明適合作為生物感測器的主結構，因其具有成本低、良好電化學活性及機械抵抗力等性質。在過去我們也已了解碳纖維紙的電化學性質可經由氧電漿處理來改善，不過，這樣的處理方式所產生的效果並不能持續很長的時間本研究即藉由金屬奈米粒子的修飾來探討其增進電漿處理的碳纖維紙產生改善效應的可能性。有趣的是，以電沉積奈米金及奈米鈀於碳纖維紙上不只能維持電漿處理的改善效果，也可以增加碳纖維紙的電子傳遞效率。電沉積奈米金及奈米鈀的電化學特性研究是經由其電化學反應、再現性及穩定性來做分析的。我們期望能夠建立一個理想的表面修飾流程來改善碳纖維電極的電化學特性,並藉此對生物感測器在未來的設計研發上有所幫助。

Carbon fiber paper (CFP) has been shown to be suitable for the construction of biosensors due to its low cost, good electrochemical activity and mechanical resistance. Previously, we have shown that its electrochemical properties can be improved by the oxygen plasma treatment. However, the life time of the enhancing effect of the plasma treatment is short. In this study the effect of metallic nanoparticles modification is explored to improve the enhancing effect of plasma treatment of CFP. Interestingly, the electrodeposition of gold (Au) and palladium (Pd) on the CFP was found to not only maintain the enhancing effect of plasma treatment, but also increase the electron transfer efficiency of CFP. The electrochemical properties of the electrodeposited Au and Pd nanoparticles were studied and analyzed in terms of their electrochemical responses, electron transfer efficiency, reproducibility and stability. It is our hope to establish an optimal surface modification procedure to improve the electrochemical properties of CFP electrode for future biosensor design and development.