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Electrochemical Detection of Single Molecules
Abstract
The electrochemical behavior of a single molecule can be observed by trapping a small volume of a dilute solution of the electroactive species between an ultramicroelectrode tip with a diameter of ∼15 nanometers and a conductive substrate. A scanning electrochemical microscope was used to adjust the tip-substrate distance (∼10 nanometers), and the oxidation of [(trimethylammonio)methyl] ferrocene (Cp 2 FeTMA + ) to Cp 2 FeTMA 2+ was carried out. The response was stochastic, and anodic current peaks were observed as the molecule moved into and out of the electrode-substrate gap. Similar experiments were performed with a solution containing two redox species, ferrocene carboxylate (Cp 2 FeCOO - ) and Os(bpy) 3 2+ (bpy is 2,2′-bipyridyl).
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Cited by
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
Vannoy, K. J., Ryabykh, A., Chapoval, A. I., & Dick, J. E. (2021) · The Analyst · doi:10.1039/d1an00230a · Cited by 26
Chávez-Ramos, A. E., Saddler, J., Katt, D., Galicia, M., & Ortiz-Ledón, C. A. (2026) · ACS Measurement Science Au · doi:10.1021/acsmeasuresciau.6c00290
Metadata
- Authors
- Fan, F.-R. F., & Bard, A. J.
- Venue
- Science
- Published
- 1995-02-10
- Volume
- 267
- Issue
- 5199
- Pages
- 871-874
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2028061703
- Cited by
- 376
- References
- 0
- FWCI
- 7.26
- Type
- journal article
- Language
- en
- Open access
- closed
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