Ion Flow Crossing Over a Polyelectrolyte Diode on a Microfluidic Chip

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 chemodosimet...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2011-09, Vol.7 (18), p.2629-2639
Main Authors: Han, Ji-Hyung, Kim, Kwang Bok, Bae, Je Hyun, Kim, Beom Jin, Kang, Chung Mu, Kim, Hee Chan, Chung, Taek Dong
Format: Article
Language:English
Subjects:
Chips
Devices
Diodes
Electrolytes
Electrolytes - chemistry
Fluoresceins - chemistry
Fluorescent Dyes
Hydrazides
Hydrazines - chemistry
Hydrogen-Ion Concentration
Ions - chemistry
Microfluidic Analytical Techniques - instrumentation
Microfluidics
Monitoring
penetration current
Polyelectrolytes
rectification
Rhodamines - chemistry
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Summary: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. The key evidences for the rectification mechanism of an aqueous ion diode based on polyelectrolytic plugs on a microfluidic chip are reported by monitoring the ion flow crossing over the junction. How hysteresis phenomena, exhibited through the nonlinear behavior of the polyelectrolyte diode, is affected by a variety of parameters (e.g., switching potential, scan rate, and electrolyte concentration) is also investigated.
ISSN:1613-6810
1613-6829
1613-6829
DOI:10.1002/smll.201100827