contact potential difference การใช้

Nowadays, this is often known as a contact potential difference.
The apparatus may operate in dual photoemission and contact potential difference ( CPD ) measurement modes.
The diode possesses a " built-in potential " due to the contact potential difference between the two different materials on either side of the junction.
Years earlier, Alessandro Volta, who had measured a contact potential difference at the metal metal ( electrode electrode ) interface of his cells, had held the incorrect opinion that contact alone ( without taking into account a chemical reaction ) was the origin of the emf.
*PCT / GB2013 / 050427 A measurement apparatus for surface analysis carried out in a gaseous environment such as air comprises a measurement device capable of measuring a contact potential difference between a probe and a surface, and a light source that triggers photoelectric emission from a sample.