Journal
SMALL
Volume 7, Issue 18, Pages 2629-2639Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201100827
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Funding
- NRF (National Research Foundation) [M10536090001-05N3609-00110, 2011-0017951, 2010-0020772]
- MEST (Ministry of Education, Science and Technology) of Korea
- Converging Research Center through Ministry of Education, Science and Technology [2010K001297]
- National Research Foundation of Korea [2010-0011751, 2010-0020780, 2005-2001249] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Key evidences are reported for the rectification mechanism of an aqueous ion diode based on polyelectrolytic plugs on a microfluidic chip by monitoring the ion flow crossing over the junction. The ion flow penetrating the polyelectrolyte junction is visualized by employing a fluorescent chemodosimeter, rhodamine B hydrazide and the pH-dependent dye, carboxy-fluorescein. How hysteresis phenomena, exhibited through the nonlinear behavior of the polyelectrolyte diode, are affected by a variety of parameters (e. g., switching potential, scan rate, and electrolyte concentration) is also investigated. The insights and knowledge from this study provide a crucial foundation for ion control at the iontronic diode in the aqueous phase, leading to more advanced aqueous organic computing devices and more diverse applications for microfluidic logic devices.
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