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Single Molecule Electrochemistry
Abstract
By using specially constructed nanometer tips of sharpened Pt-Ir wire in a wax sheath, small numbers of molecules (1−10) can be trapped between the tip and a substrate. Repeated electron transfers of an electroactive molecule as it shuttles by diffusion between tip and substrate produce a current (∼0.6 pA/molecule) that can be used to detect the trapped molecules. The tip electrode size and shape can be found from the electrode approach curves (current vs tip-to-substrate distance) based on approximate equations and digital simulations. Analysis of the observed fluctuating currents by autocorrelation, spectral density, and probability density functions is also described.
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Cited by
Zhang, B., Galusha, J., Shiozawa, P. G., Wang, G., Bergren, A. J., Jones, R. M., White, R. J., Ervin, E. N., Cauley, C. C., & White, H. S. (2007) · Analytical Chemistry · doi:10.1021/ac070609j · Cited by 277
Nanometer-Sized Electrochemical Sensors
Shao, Y., Mirkin, M. V., Fish, G., Kokotov, S., Palanker, D., & Lewis, A. (1997) · Analytical Chemistry · doi:10.1021/ac960887a · Cited by 262
Observation of Single-Protein and DNA Macromolecule Collisions on Ultramicroelectrodes
Dick, J. E., Renault, C., & Bard, A. J. (2015) · Journal of the American Chemical Society · doi:10.1021/jacs.5b04545 · Cited by 215
Self-citationReview—Electrochemistry's Potential to Reach the Ultimate Sensitivity in Measurement Science
Goines, S., & Dick, J. E. (2020) · Journal of The Electrochemical Society · doi:10.1149/2.0052003jes · Cited by 81
Metadata
- Authors
- Fan, F.-R. F., Kwak, J., & Bard, A. J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 1996-01-01
- Volume
- 118
- Issue
- 40
- Pages
- 9669-9675
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2064580674
- Cited by
- 192
- References
- 0
- FWCI
- 4.70
- Type
- journal article
- Language
- en
- Open access
- closed
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