Title :
Combined measurement of surface potential and zeta potential at insulator/electrolyte interfaces
Author :
Bousse, L.J. ; Mostarshed, S. ; Hafeman, D.
Author_Institution :
Molecular Devices Corp., Menlo Park, CA, USA
Abstract :
Simultaneous measurements of relative surface potential and zeta potential, as monitored by streaming potential measurement, were made at the interface between Si/sub 3/N/sub 4/ (on a semiconductor substrate) and aqueous electrolytes of varied pH. The light-addressable-potentiometric-sensor (LAPS) technique was used to make the simultaneous measurements. The results indicate the zero zeta potential occurred at an electrolyte pH of 3.1. Upon changing pH, approximately 10% of the surface potential change also appeared as a change in zeta potential.<>
Keywords :
electrochemical analysis; electrokinetic effects; interface phenomena; surface potential; Si/sub 3/N/sub 4/ interface; SiO/sub 2/-Si/sub 3/N/sub 4/; aqueous electrolytes; chemical sensors; insulator-electrolyte interfaces; light-addressable-potentiometric-sensor; relative surface potential; simultaneous measurements; streaming potential measurement; varied pH; zeta potential; Area measurement; Current measurement; Electrodes; Electrokinetics; Insulation; Monitoring; Reservoirs; Silicon; Substrates; Surface impedance;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.148922
