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The manipulation of C60 in molecular arrays with an STM tip in regimes below the decomposition threshold.

Authors
  • Olyanich, Dmitry A
  • Kotlyar, Vasily G
  • Utas, Tatiana V
  • Zotov, Andrey V
  • Saranin, Alexander A
Type
Published Article
Journal
Nanotechnology
Publisher
IOP Publishing
Publication Date
Feb 08, 2013
Volume
24
Issue
5
Pages
55302–55302
Identifiers
DOI: 10.1088/0957-4484/24/5/055302
PMID: 23306698
Source
Medline
License
Unknown

Abstract

The ability of scanning tunneling microscopy to manipulate selected C(60) molecules within close packed C(60) arrays on a (Au,In)/Si(111) surface has been examined for mild conditions below the decomposition threshold. It has been found that knockout of the chosen C(60) molecule (i.e., vacancy formation) and shifting of the C(60) molecule to the neighboring vacant site (if available) can be conducted for wide ranges of bias voltages (from -1.5 to +0.5 V), characteristic manipulation currents (from 0.02 to 100 nA) and powers (from 2 × 10(-8) to 0.1 μW). This result implies that the manipulation is not associated with the electrical effects but rather has a purely mechanical origin. The main requirement for successful C(60) knockout has been found to be to ensure a proper 'impact parameter' (deviation from central impact on the C(60) sphere by the tip apex), which should be less than ~1.5 Å. A certain difference has been detected for the manipulation of C(60) in extended molecular arrays and molecular islands of a limited size. While it is possible to manipulate a single C(60) molecule in an array, in the case of a C(60) island it appears difficult to manipulate a given fullerene without affecting the other ones constituting the island.

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