Coulomb blockade behaviors in individual Au nanoparticles as observed through noncontact atomic force spectroscopy at room temperature
Coulomb blockade behaviors in individual Au nanoparticles of 2 nm core diameter in double-barrier structures have been studied by means of noncontact atomic force spectroscopy (NC-AFS) at room temperature. The Au nanoparticles with a 1-decanethiol ligand were chemisorbed by 1,10-decanedithiol molecu...
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Published in | Nanotechnology Vol. 23; no. 18; p. 185704 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
IOP Publishing
11.05.2012
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Subjects | |
Online Access | Get full text |
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Summary: | Coulomb blockade behaviors in individual Au nanoparticles of 2 nm core diameter in double-barrier structures have been studied by means of noncontact atomic force spectroscopy (NC-AFS) at room temperature. The Au nanoparticles with a 1-decanethiol ligand were chemisorbed by 1,10-decanedithiol molecules of a mixed 1-octanethiol/1,10-decanedithiol self-assembled monolayer coated on a Au(111) surface; these particles were observed through NC-AFS. NC-AFS measurements of the cantilever frequency shift-sample voltage (Δf-VS) curves were sequentially conducted on three Au nanoparticles under the same experimental conditions; the Δf-VS curves were found to deviate from the parabolic (ΔfN) curve in the cases where no extra charge existed on the Au core. The experimental ΔfCB(=Δf − ΔfN) and ΔfCB V curves agree well with the theoretical curves obtained using a golden-rule calculation and the same parabolic parameters. All the results, through NC-AFS, suggest Coulomb blockade behaviors in the Au nanoparticles at room temperature. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1 |
ISSN: | 0957-4484 1361-6528 |
DOI: | 10.1088/0957-4484/23/18/185704 |