The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.
Current Transients in Single Nanoparticle Collision Events
Abstract
Electrochemical hydrazine oxidation and proton reduction occur at a significantly higher rate at Pt than at Au or C electrodes. Thus, the collision and adhesion of a Pt particle on a less active Au or C electrode leads to a large current amplification by electrocatalysis at single nanoparticles (NPs). At low particle concentrations, the collision of Pt NPs was characterized by current transients composed of individual current profiles that rapidly attained a steady state, signaling single NP collisions. The characteristic steady-state current was used to estimate the particle size. The fluctuation in collision frequency with time indicates that the collision of NPs at the detector electrodes occurs in a statistically random manner, with the average frequency a function of particle concentration and diffusion coefficient. A longer term current decay in single current transients, as opposed to the expected steady-state behavior, was more pronounced for proton reduction than for hydrazine oxidation, revealing microscopic details of the nature of the particle interaction with the detector electrode and the kinetics of electrocatalysis at single NPs. The study of single NP collisions allows one to screen particle size distributions and estimate NP concentrations and diffusion coefficients.
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Cites
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Gold Nanoelectrodes of Varied Size: Transition to Molecule-Like Charging
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Boika, A., Thorgaard, S. N., & Bard, A. J. (2013) · The Journal of Physical Chemistry B · doi:10.1021/jp306934g · Cited by 160
Self-citationRees, N. V., Zhou, Y., & Compton, R. G. (2011) · ChemPhysChem · doi:10.1002/cphc.201100207 · Cited by 96
Single-entity electrochemistry of collision in sensing applications
Sekretareva, A. (2021) · Sensors and Actuators Reports · doi:10.1016/j.snr.2021.100037 · Cited by 41
Trends in single-impact electrochemistry for bacteria analysis
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Metadata
- Authors
- Xiao, X., Fan, F.-R. F., Zhou, J., & Bard, A. J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2008-11-14
- Volume
- 130
- Issue
- 49
- Pages
- 16669-16677
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2020129380
- Cited by
- 451
- References
- 22
- FWCI
- 4.98
- Type
- journal article
- Language
- en
- Open access
- closed
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