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

Journal article

Publication Details

Author(s): Ristein J, Maier F, Ley L
Journal: Physical Review B
Publisher: American Physical Society
Publication year: 2001
Volume: 64
Pages range: 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 Authors / FAU Editors

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

How to cite

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.


Last updated on 2018-09-08 at 06:09