J053041 微小電極表面におけるイオン電流の過渡応答に関する理論モデル(〔J053-04〕マイクロ・ナノスケールの熱流体現象(4))

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  • J053041 Theoretical Model of Transient Response of Ionic Current on Microscale Electrode Surface

抄録

Recently, ionic current in micro/nano-fluidic devices has attracted significant attention, which has an important role to rectify the current direction via nanochannel or detect single molecules passing through a nanopore. In such down-sized devices, the magnitude of base current turns to be on the order of 10^<-9>A, including noise. In order to detect weak electrical signals, improvement of the signal-to-noise ratio is one of the most important issues. On the other hand, details of nonequilibrium ionic responses have not been clarified enough. Herein, we have developed a theoretical model to represent ionic current responses near a biased electrode surface, where the phenomena can be expressed by coupling the Nernst-Planck equation and Poisson equation. Consequently, rapid increase and slow decay of the ionic current response can be expressed as a result of ion transport at very near the electrode surface.

収録刊行物

  • 年次大会

    年次大会 2013 (0), _J053041-1-_J053041-3, 2013

    一般社団法人 日本機械学会

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