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Atmospheric‐pressure photoelectron emission from H‐terminated and amino‐terminated diamond
Author(s) -
Hamers Robert J.,
Bandy Jason
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600152
Subject(s) - electron , atmospheric pressure , diamond , atomic physics , argon , ion , x ray photoelectron spectroscopy , materials science , chemistry , physics , nuclear magnetic resonance , organic chemistry , quantum mechanics , meteorology , composite material
We report investigations of the ultraviolet‐induced emission of electrons from diamond into air, argon, and SF 6 gases at atmospheric pressure. Although diamond has long been known to be a facile emitter of electrons in vacuum, the present results show that H‐terminated and amino‐terminated diamond can also act as emitters of low‐energy electrons into gases at atmospheric pressure. Present results show that emission currents follow the trend Ar > air > SF 6 . We attribute these differences to the fact that Ar does not form stable anions and the emitted electrons remain as free electrons with very low effective mass, while electrons in air form O 2 − and electrons in SF 6 form SF 6 − anions. The observed trends are consistent with trends reported in ion mobility measurements. Photoemission of electrons from diamond into argon gas at atmospheric pressure.