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Field‐Emission Microscopy of Germanium
Author(s) -
Ernst L.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670190109
Subject(s) - germanium , work function , field electron emission , adsorption , torr , materials science , analytical chemistry (journal) , electrical resistivity and conductivity , desorption , plane (geometry) , field emission microscopy , field (mathematics) , oxide , oxygen , sticking probability , chemistry , optics , geometry , metal , optoelectronics , thermodynamics , metallurgy , physics , mathematics , diffraction , silicon , chromatography , quantum mechanics , electron , organic chemistry , pure mathematics
Samples of n‐type germanium with resistivity 5 ωcm which are cleaned by field desorption are examined using a field emission microscope. Some characteristics of the patterns obtained from the atomically clean surfaces are discussed. The adsorption of oxygen at pressures of 10 −8 to 10 −6 Torr is examined at room temperature. Adsorption occurs primarily on {001} planes and near {011} planes, whilst the actual {011} planes and the {111} plane seem to adsorb relatively less. The mean sticking probability is found to be about 0.1. The patterns show that oxide clusters also develop in the course of adsorption. Hence only a possible minimum value of the increase in the work function may be calculated from the change of slope of the Fowler‐Nordheim characteristic.