Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 2486-2492 |
| Number of pages | 7 |
| Journal | Nano Letters |
| Volume | 6 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2006 Nov |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Chemistry (miscellaneous)
Cite this
Current rectification with poly-L-lysine-coated quartz nanopipettes. / Umehara, Senkei; Pourmand, Nader; Webb, Chris D.; Davis, Ronald W.; Yasuda, Kenji; Karhanek, Miloslav.
In: Nano Letters, Vol. 6, No. 11, 11.2006, p. 2486-2492.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Current rectification with poly-L-lysine-coated quartz nanopipettes
AU - Umehara, Senkei
AU - Pourmand, Nader
AU - Webb, Chris D.
AU - Davis, Ronald W.
AU - Yasuda, Kenji
AU - Karhanek, Miloslav
PY - 2006/11
Y1 - 2006/11
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=33846121634&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846121634&partnerID=8YFLogxK
U2 - 10.1021/nl061681k
DO - 10.1021/nl061681k
M3 - Article
C2 - 17090078
AN - SCOPUS:33846121634
VL - 6
SP - 2486
EP - 2492
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 11
ER -