Kelvin probe force microscopy studies of the charge effects upon adsorption of carbon nanotubes and C60 fullerenes on hydrogen-terminated diamond

被引：4

作者：

Koelsch, S. ^{[1
]}

Fritz, F. ^{[2
,3
,4
]}

Fenner, M. A. ^{[5
,9
]}

Kurch, S. ^{[1
]}

Woehrl, N. ^{[6
,7
]}

Mayne, A. J. ^{[8
]}

Dujardin, G. ^{[8
]}

Meyer, C. ^{[2
,3
,4
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys Chem, Duesbergweg 10-14, D-55099 Mainz, Germany

[2] Univ Osnabruck, Dept Phys, Barbarastr 7, D-49076 Osnabruck, Germany

[3] Forschungszentrum Julich, Peter Grunberg Inst PGI 6, Wilhelm Johnen Str, D-52428 Julich, Germany

[4] Forschungszentrum Julich, JARA Fundamentals Future Informat Technol, D-52425 Julich, Germany

[5] Keysight Technol Deutschland GmbH, Lyoner Str 20, D-60528 Frankfurt, Germany

[6] Univ Duisburg Essen, Fac Phys, Lotharstr 1, D-47057 Duisburg, Germany

[7] Univ Duisburg Essen, CENIDE, Lotharstr 1, D-47057 Duisburg, Germany

[8] Univ Paris Saclay, Univ Paris Sud, CNRS UMR 8214, Inst Sci Mol Orsay, Bat 210, F-91405 Orsay, France

[9] Scienta Omicron GmbH, Limburger Str 75, D-65232 Taunusstein, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2018年 / 123卷 / 01期

关键词：

SINGLE-CRYSTAL DIAMOND; ATOMIC-SCALE; SURFACE; CONDUCTIVITY;

D O I：

10.1063/1.5019486

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hydrogen-terminated diamond is known for its unusually high surface conductivity that is ascribed to its negative electron affinity. In the presence of acceptor molecules, electrons are expected to transfer from the surface to the acceptor, resulting in p-type surface conductivity. Here, we present Kelvin probe force microscopy (KPFM) measurements on carbon nanotubes and C-60 adsorbed onto a hydrogen-terminated diamond (001) surface. A clear reduction in the Kelvin signal is observed at the position of the carbon nanotubes and C-60 molecules as compared with the bare, air-exposed surface. This result can be explained by the high positive electron affinity of carbon nanotubes and C-60, resulting in electron transfer from the surface to the adsorbates. When an oxygen-terminated diamond (001) is used instead, no reduction in the Kelvin signal is obtained. While the presence of a charged adsorbate or a difference in work function could induce a change in the KPFM signal, a charge transfer effect of the hydrogen-terminated diamond surface, by the adsorption of the carbon nanotubes and the C-60 fullerenes, is consistent with previous theoretical studies. Published by AIP Publishing.

引用

页数：9