Circuit for the measurement of surface potential changes by the static capacitor method
Abstract
Circuitry is presented for the measurement of surface potential changes upon adsorption of gases on a metal foil or film by the static capacitor method. The circuit operates in the usual manner applying a backing off potential which opposes the flow of current from the cell comprised of the foil or film and a reference surface. The advantages of the present circuit include simplicity, low cost, fast response time, no moving parts, and the requirement of only one low voltage, dual-polarity power supply.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- February 1980
- DOI:
- Bibcode:
- 1980RScI...51..246P
- Keywords:
-
- Capacitors;
- Chemisorption;
- Electric Potential;
- Gas-Solid Interactions;
- Integrated Circuits;
- Metal Foils;
- Electrical Measurement;
- Electron Emission;
- Hydrogen;
- Surface Properties;
- Time Dependence;
- Instrumentation and Photography;
- 07.50.+f;
- 73.20.-r;
- Electron states at surfaces and interfaces