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Author

Lee, Chang Young
Carbon Nanomaterials Lab
Research Interests
  • Carbon nanomaterials, gas sensors, neuroanalytical chemistry, biomimetic nanosystems

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Coherence Resonance in a Single-Walled Carbon Nanotube Ion Channel

Cited 85 times inthomson ciCited 86 times inthomson ci
Title
Coherence Resonance in a Single-Walled Carbon Nanotube Ion Channel
Other Titles
Coherence Resonance in a Single-Walled Carbon Nanotube Ion Channel
Author
Lee, Chang YoungChoi, WonjoonHan, Jae-HeeStrano, Michael S.
Keywords
STOCHASTIC RESONANCE; MEMBRANE PATCHES; SURFACE-CHARGE; K+ CHANNEL; NOISE; TRANSPORT; WATER; TRANSLOCATION; COORDINATION; ENHANCEMENT
Issue Date
201009
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE, v.329, no.5997, pp.1320 - 1324
Abstract
Biological ion channels are able to generate coherent and oscillatory signals from intrinsically noisy and stochastic components for ultrasensitive discrimination with the use of stochastic resonance, a concept not yet demonstrated in human-made analogs. We show that a single-walled carbon nanotube demonstrates oscillations in electroosmotic current through its interior at specific ranges of electric field that are the signatures of coherence resonance. Stochastic pore blocking is observed when individual cations partition into the nanotube obstructing an otherwise stable proton current. The observed oscillations occur because of coupling between pore blocking and a proton-diffusion limitation at the pore mouth. The result illustrates how simple ionic transport can generate coherent waveforms within an inherently noisy environment and points to new types of nanoreactors, sensors, and nanofluidic channels based on this platform
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DOI
http://dx.doi.org/10.1126/science.1193383
ISSN
0036-8075
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