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.
| Original language | English |
|---|---|
| Pages (from-to) | 1320-1324 |
| Number of pages | 5 |
| Journal | Science |
| Volume | 329 |
| Issue number | 5997 |
| DOIs | |
| Publication status | Published - 2010 Sep 10 |
| Externally published | Yes |
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Cite this
Coherence resonance in a single-walled carbon nanotube ion channel. / Lee, Chang Young; Choi, Wonjoon; Han, Jae Hee; Strano, Michael S.
In: Science, Vol. 329, No. 5997, 10.09.2010, p. 1320-1324.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coherence resonance in a single-walled carbon nanotube ion channel
AU - Lee, Chang Young
AU - Choi, Wonjoon
AU - Han, Jae Hee
AU - Strano, Michael S.
PY - 2010/9/10
Y1 - 2010/9/10
N2 - 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.
AB - 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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U2 - 10.1126/science.1193383
DO - 10.1126/science.1193383
M3 - Article
VL - 329
SP - 1320
EP - 1324
JO - Science
JF - Science
SN - 0036-8075
IS - 5997
ER -