Single silver nanoparticles strip in many shots

SECCM impact transients show 10 nm Ag particles often dissolve in one spike, but larger ones leave, return, and only partly oxidize.

Keep what you just learned

Save these 11 cards to your NoteFren library. Your first review starts right away, and each card links back to the study it came from.

How do 10 nm Ag nanoparticles typically strip?

In a single electrochemical event lasting a few milliseconds.

Where does most charge go for larger particles?

60–85% in bundled or saw-tooth transients lasting up to seconds.

What platform provided low-noise fast transients?

Scanning electrochemical cell microscopy (SECCM).

What is the mechanistic picture of large-NP stripping?

Consecutive partial oxidations with the NP drifting out of and back into the tunneling region.

Is impact coulometry a general sizing method here?

No—especially 60 and 100 nm particles leave after incomplete stripping.

What charge window do individual spikes occupy?

About 10−15 to 10−13 C, as if the particle were 10–20 nm.

Which collector electrodes were compared?

Glassy carbon and gold at 0.6 V.

How does Au change event duration versus GC?

Events last about twice as long on Au because Ag interacts more strongly with Au.

What field name is given to NP collision electrochemistry?

Single NP impact electrochemistry (SNIE).

What I–t shape appears besides simple spikes?

Irregular saw-tooth profiles lasting 5–20 ms and longer.

What experimental need does SNIE impose?

Low pA background and fast amplifiers so I–t shapes are not distorted.