https://scholars.lib.ntu.edu.tw/handle/123456789/598234
標題: | Origin of Ultrahigh Rectification in Polyelectrolyte Bilayers Modified Conical Nanopores | 作者: | Liu T.-J Ma T Lin C.-Y Balme S Hsu J.-P. JYH-PING HSU |
關鍵字: | Deposition;Diodes;Ions;Nanopores;Sodium chloride;'current;Aqueous NaCl solutions;Bi-layer;Conical nanopores;Functionalized;Ionic diodes;Ionic transports;Layer by layer deposition;Polyelectrolyte layers;Rectification behavior;Polyelectrolytes | 公開日期: | 2021 | 卷: | 12 | 期: | 49 | 起(迄)頁: | 11858-11864 | 來源出版物: | Journal of Physical Chemistry Letters | 摘要: | The switching of “ON” and “OFF” states of an ionic diode is investigated by considering a conical nanopore partially functionalized two polyelectrolyte (PE) layers via layer-by-layer deposition. Through observing the inversion of its rectification behavior, we demonstrate the function of the PE bilayers in ionic transport regulation. The ionic diode exhibits an ultrahigh ion rectification at a low level of pH. In an aqueous NaCl solution at pH 2, for example, the ratio of the current at “ON” state and that at “OFF” state can be about 800 and 200 for 1 and 100 mM, respectively. This remarkable gating behavior can be explained by the anion-pump-induced ion accumulation in the neutral region as well as the depletion zone at the interface. Our results further demonstrate the possibility of achieving an ultrahigh rectification in an ionic diode having a unipolar-like configuration. ? 2021 American Chemical Society |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121024801&doi=10.1021%2facs.jpclett.1c03513&partnerID=40&md5=7119d810f85c312838037a9d6dc5c4c2 https://scholars.lib.ntu.edu.tw/handle/123456789/598234 |
ISSN: | 19487185 | DOI: | 10.1021/acs.jpclett.1c03513 |
顯示於: | 化學工程學系 |
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