Journal
NANO LETTERS
Volume 6, Issue 11, Pages 2486-2492Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl061681k
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Funding
- NHGRI NIH HHS [HG003448, P01-HG000205, R21 HG003448, P01 HG000205-190004, P01 HG000205] Funding Source: Medline
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Ion current rectification with quartz nanopipette electrodes was investigated through the control of the surface charge. The presence and absence of a positively charged poly-L-lysine (PLL) coating resulted in the rectified current with opposite polarity. The results agreed with the theories developed for current-rectifying conical nanopores, suggesting the similar underlying mechanism among asymmetric nanostructure in general. This surface condition dependence can be used as the fundamental principle of multi-purpose real-time in vivo biosensors.
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