ISSN:
1040-0397
Schlagwort(e):
Surface charge density
;
Controlled growth mercury electrode
;
Capillary noise
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The surface charge density of the mercury-electrolyte interface is estimated using chronocoulometry at a controlled growth mercury electrode. After initial formation and equilibration the mercury drop is expanded by further addition of mercury. Direct measurement of the charge required as new area is formed is used to estimate the surface charge density. The mercury drop is modeled as a step-wise expanding sphere.The capillary noise continuously produced by stationary drops under potential control was investigated and characterized. Spectral analysis of the noise reveals that the electrode is particularly sensitive to vibrations near the resonant frequency of the suspended drop. Ambient vibrations in the laboratory environment produce alternating currents at the electrode which vanish at the point of zero charge and so mark its position.
Zusätzliches Material:
11 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/elan.1140080807
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