Tip-State Control of Rates and Branching Ratios in Atomic Manipulation

Sloan, Peter; Palmer, Richard E.

doi:10.1021/nl050142x

Cited by 27 publications

(25 citation statements)

References 35 publications

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“…The radial and angular distribution of the chlorine atoms depended on the tunnelling current . It was shown that tip states determine the branching ratio of this process as compared to desorption of the molecule from the surface . Desorption of chlorine from the same surface during scanning was shown to proceed via two holes .…”

Section: Manipulation Employing the Electron Currentmentioning

confidence: 99%

Controlled manipulation of single atoms and small molecules using the scanning tunnelling microscope

Morgenstern

Lorente

Rieder

2013

Phys. Status Solidi B

108

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This article reviews manipulation of single molecules by scanning tunnelling microscopes, in particular vertical manipulation, lateral manipulation, and inelastic electron tunnelling (IET) manipulation. For a better understanding of these processes, we shortly review imaging by scanning tunnelling microscopy – as a prerequisite to detect the manipulated species and to verify the result of the manipulation – as well as scanning tunnelling spectroscopy and IET spectroscopy which are used to chemically identify the molecules before and after the manipulation that employs the tunnelling current.

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Section: Manipulation Employing the Electron Currentmentioning

confidence: 99%

Controlled manipulation of single atoms and small molecules using the scanning tunnelling microscope

Morgenstern

Lorente

Rieder

2013

Phys. Status Solidi B

108

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“…The present work is the first step towards (b), in that it demonstrates how the cross section for a remote manipulation event depends delicately on the STM charge injection site, with atomic precision. Furthermore, our results also have striking implications for the absolute cross sections for a whole raft of published STM scanning [7][8][9][10][11][12] (versus local [5]) manipulation experiments as well as electron-beam [13,14] and photoinduced surface chemical processes [15], because the possibility of lateral charge transport of the type exploited here has not generally been considered.…”

mentioning

confidence: 93%

Nonlocal Desorption of Chlorobenzene Molecules from theSi(111)−(7×7)Surface by Charge Injection from the Tip of a Scanning Tunneling Microscope: Remote Control o

2010

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We report the nonlocal desorption of chlorobenzene molecules from the Si(111)-(7×7) surface by charge injection from the laterally distant tip of a scanning tunneling microscope and demonstrate remote control of the manipulation process by precise selection of the atomic site for injection. Nonlocal desorption decays exponentially as a function of radial distance (decay length ∼100 A) from the injection site. Electron injection at corner-hole and faulted middle adatoms sites couples preferentially to the desorption of distant adsorbate molecules. Molecules on the faulted half of the unit cell desorb with higher probability than those on the unfaulted half.

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“…The background to our encounter with non‐local manipulation was a systematic atomic manipulation study of chlorobenzene chemisorbed on the Si(111)‐7×7 surface, which showed a diversity of reactions induced by the scanning tunnelling microscope (STM) tunnelling current, including desorption, diffusion, and C–Cl dissociation. We found, for example, that scanning the silicon surface at low voltage (below +1 V sample bias) had no effect on the molecules, but increasing the STM bias to +2.2 V resulted in chlorobenzene desorption, and proved that this was due to the tunnelling current .…”

Section: Introductionmentioning

confidence: 99%

Non‐Local Atomic Manipulation on Semiconductor Surfaces in the STM: The Case of Chlorobenzene on Si(111)‐7×7

Pan

Sloan

Palmer

2014

The Chemical Record

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Control over individual atoms with the scanning tunnelling microscope (STM) holds the tantalising prospect of atomic-scale construction, but is limited by its "one atom at a time" serial nature. "Remote control" through non-local STM manipulation-as we have demonstrated in the case of chlorobenzene on Si(111)-7×7-offers a new avenue for future "bottom-up" nanofabrication, since hundreds of chemical reactions may be carried out in parallel. Thus a good understanding of the non-local manipulation process, as provided by recent experiments, is important. Comparison of scanning tunnelling spectroscopy (STS) measurements of the bare Si(111)-7×7 surface and chemisorbed chlorobenzene molecules with the voltage dependence of the non-local STM-induced desorption of chlorobenzene proves particularly instructive. For example, the chlorobenzene LUMO appears at +0.9 V with respect to the Fermi level, whereas non-local manipulation thresholds are found at +2.1 V and +2.7 V. This difference supports a picture in which the voltage thresholds for non-local electron-induced desorption depend principally on the energies of the electronic states of the surface. Furthermore, the demonstration that the non-local process is largely insensitive to surface steps up to five layers in height suggests that either the electron transport in this process is subsurface in character or surface charge transport is responsible but is in some way unaffected by the steps.

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Tip-State Control of Rates and Branching Ratios in Atomic Manipulation

Cited by 27 publications

References 35 publications

Controlled manipulation of single atoms and small molecules using the scanning tunnelling microscope

Controlled manipulation of single atoms and small molecules using the scanning tunnelling microscope

Nonlocal Desorption of Chlorobenzene Molecules from theSi(111)−(7×7)Surface by Charge Injection from the Tip of a Scanning Tunneling Microscope: Remote Control o

Non‐Local Atomic Manipulation on Semiconductor Surfaces in the STM: The Case of Chlorobenzene on Si(111)‐7×7

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