Premium
Ion Flow Crossing Over a Polyelectrolyte Diode on a Microfluidic Chip
Author(s) -
Han JiHyung,
Kim Kwang Bok,
Bae Je Hyun,
Kim Beom Jin,
Kang Chung Mu,
Kim Hee Chan,
Chung Taek Dong
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201100827
Subject(s) - polyelectrolyte , microfluidics , materials science , aqueous solution , diode , nanotechnology , rectification , optoelectronics , ion , rhodamine b , chemistry , voltage , polymer , electrical engineering , organic chemistry , catalysis , engineering , photocatalysis , composite material
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.