Electron affinity of plasma-hydrogenated and chemically oxidized diamond (100) surfaces

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autor(en): Ristein J, Maier F, Ley L
Zeitschrift: Physical Review B
Verlag: American Physical Society
Jahr der Veröffentlichung: 2001
Band: 64
Seitenbereich: 165411
ISSN: 1098-0121


The electron affinity (EA) χ of single crystal diamond (100) is determined as a function of hydrogen and oxygen coverage by a combination of work function and photoemission experiments. For the fully hydrogenated (100)-(2×1):H surface an EA of -1.3 eV and for the oxidized surface C(100)-(1×1):O χ = +1.7 eV are obtained. These are the lowest and the highest electron affinities, respectively, ever reported for any diamond surface. The variation in χ with O and H coverage is well described by a simple dipole model provided that the depolarization is properly taken into account for high adsorbate densities. This analysis favors the bridge position (etherlike) for oxygen on C(100). By mixing H and O adsorbates on a microscopic scale the EA of C(100) can be adjusted at will over 3 eV between the extreme values without jeopardizing the chemical passivation of the diamond surface afforded by H or O termination.

FAU-Autoren / FAU-Herausgeber

Ley, Lothar Prof. Dr.
Naturwissenschaftliche Fakultät
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Ristein, Jürgen apl. Prof. Dr.
Lehrstuhl für Laserphysik


Ristein, J., Maier, F., & Ley, L. (2001). Electron affinity of plasma-hydrogenated and chemically oxidized diamond (100) surfaces. Physical Review B, 64, 165411.

Ristein, Jürgen, Florian Maier, and Lothar Ley. "Electron affinity of plasma-hydrogenated and chemically oxidized diamond (100) surfaces." Physical Review B 64 (2001): 165411.


Zuletzt aktualisiert 2018-09-08 um 06:09