Supplementary Information
Atom-by-atom extraction using scanning tunneling microscope tipcluster interaction
A. Deshpande1, H. Yildirim2,3, A. Kara2,3, D. P. Acharya1, J. Vaughn1, T. S.
Rahman2,3, S.-W. Hla1,*
1Physics & Astronomy Department, Ohio University, Athens, OH 45701.
2Department of Physics, Cardwell Hall 116, Kansas State University, Manhattan, Kansas
66506, 3Department of Physics, University of Central Florida, Orlando, Florida 32816
Supplementary Info (1)
These two manipulation signals reveal reproducibility of the atom-extraction
mechanism. The high peaks on the left part of the curves indicate that the atom is
extracted from its original position. The right part of both signals show sliding mode
manipulation, which is followed by a step-like increase in the tip-height.
Supplementary Info (2)
The STM movie showing atom-by-atom process. (Atom-extract.avi [3.6MB])
1
Supplementary Info (2)
Table I. The activation energy barriers for Ag(111) system in case of lateral and vertical
manipulation mode.
Energy Barrier/ Sharp Tip
Height in Å
Motion from
Motion from
Energy Barrier/ Blunt Tip
Motion from
Motion from
A to B
B to A
A to B
B to A
2.43
0.032 eV
0.18 eV
-
-
2.63
0.052 eV
0.21 eV
0.08 eV
0.16 eV
2.83
0.12 eV
0.24 eV
0.08 eV
0.21 eV
3.03
0.194 eV
0.27 eV
0.08 eV
0.24 eV
3.23
0.28 eV
0.28 eV
0.12 eV
0.26 eV
3.43
0.29 eV
0.3 eV
0.21 eV
0.28 eV
3.63
0.3 eV
0.31 eV
0.32 eV
0.29 eV
2