Electrochemical detection of single E. coli bacteria labeled with silver nanoparticles
Abstract
A proof-of-concept for the electrochemical detection of single Escherichia coli bacteria decorated with silver nanoparticles is reported. Impacts of bacteria with an electrode - held at a suitably oxidizing potential - lead to an accompanying burst of current with each collision event. The frequency of impacts scales with the concentration of bacteria and the charge indicates the extent of decoration.
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The first reported strategy to detect single bacteria impacts is to decorate E. coli cells with Ag nanoparticles, which can be oxidized during stochastic collisions at a UME biased at the appropriate potential.
“The first reported strategy to detect single bacteria impacts is to decorate the E. coli cells with Ag nanoparticles, which can be oxidized during stochastic collisions at a UME biased at the appropriate potential [23,37].”
From Trends in single-impact electrochemistry for bacteria analysis (2023) · cites this paper as [23]
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- Authors
- Sepunaru, L., Tschulik, K., Batchelor-McAuley, C., Gavish, R., & Compton, R. G.
- Affiliations
- University of Oxford (GB)
- Department of Chemistry
- Schneider Children's Medical Center (IL)
- Corresponding author
- Compton, Richard G.
- Venue
- Biomaterials Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2015
- Volume
- 3
- Issue
- 6
- Pages
- 816-820
- ISSN
- 2047-4830 (ISSN-L)
- 2047-4849
- OpenAlex
- W2101233145
- Cited by
- 116
- References
- 23
- Citations by year
- 2026: 6 · 2025: 2 · 2024: 6 · 2023: 17 · 2022: 14 · 2021: 10 · 2020: 16 · 2019: 8 · 2018: 15 · 2017: 3 · 2016: 16 · 2015: 3
- FWCI
- 5.95
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biomaterials Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- European Research Council (320403)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
- Physical Sciences › Chemistry › Electrochemistry › Electrochemical Analysis and Applications
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
- Keywords
- Escherichia coli, single-bacteria detection, silver nanoparticles, electrochemical biosensing, bacterial concentration measurement, label-free detection
- MeSH terms
- Anti-Bacterial Agents, Electrodes, Escherichia coli, Oxidation-Reduction, Silver, Metal Nanoparticles
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