Electrochemistry
Single silver nanoparticles strip in many shots
Open access · cc by · source: Europe PMC
SECCM impact transients show 10 nm Ag particles often dissolve in one spike, but larger ones leave, return, and only partly oxidize.
Key findings
10 nm particles mostly dissolve in a few-millisecond single event. For larger particles, 60–85% of charge sits in bundled or saw-tooth transients spanning milliseconds to seconds because particles hop in and out of the tunneling region. 60–100 nm particles often leave after incomplete stripping, so impact coulometry is a poor general sizing method.
Methodology
Authors landed single Ag nanoparticles of 10–100 nm on glassy-carbon and gold collectors in a scanning electrochemical cell microscope and classified current–time shapes, charges, durations, and impact frequencies.
Limitations
The study is Ag on GC/Au in one electrolyte window; it does not size-calibrate every nanomaterial claimed in the impact-coulometry literature.
How this study connects
Role on claims
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This library holds 3 empirical chemistry papers on seccm with isolated findings, rates or spectra rather than reviews.
Evidence for the claim as stated.
SECCM impact transients show 10 nm Ag particles often dissolve in one spike, but larger ones leave, return, and only partly oxidize.
Evidence for the claim as stated.
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