Deposition of Hydrogenated Si Clusters on Si(111)-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mn>7</mml:mn><mml:mo>×</mml:mo><mml:mn>7</mml:mn><mml:mo>)</mml:mo></mml:math>Surfaces

Watanabe, Mutsumi; Miyazaki, Takehide; Kanayama, Toshihiko

doi:10.1103/physrevlett.81.5362

Cited by 34 publications

(22 citation statements)

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“…Technological applications require clusters to be deposited on surfaces, and so the physics of the deposition process is becoming increasingly important [6][7][8][9][10]. The ability to create a monodispersed array of size-selected clusters by deposition is thus an important goal.…”

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confidence: 99%

Shallow Implantation of “Size-Selected” Ag Clusters into Graphite

et al. 2000

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We have investigated the implantation of Ag N ͑N 20 200͒ clusters into a graphite substrate over the range of energies ͑E͒ 0.75 6 keV using molecular dynamics simulations. We find that after implantation the silver clusters remain coherent, albeit amorphous, and rest at the bottom of an open tunnel in the graphite created by the impact. It is found that the implantation depth of the clusters varies linearly as E͞N 2͞3 . We conclude that the cluster is decelerated by a constant force proportional to its cross-sectional area. We also identify a threshold energy for surface penetration associated with elastic compression of the graphite substrate.

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confidence: 99%

Shallow Implantation of “Size-Selected” Ag Clusters into Graphite

et al. 2000

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“…The Si 6 H 12 clusters were synthesized using the clusterion growth technique and the deposition equipment described previously [10,12]. Hydrogen-saturated Si cluster cations Si 6 H + 13 were grown from silane (SiH 4 ) gas with H 2 ambient gas in an ion trap through reaction between SiH +…”

Section: Methodsmentioning

confidence: 99%

“…A cluster growth technique [10,11] providing composition control and size selection of clusters allows us to study hydrogenated silicon clusters Si n H x (n = 3−8) assembled on solid surfaces. We have already reported that hydrogen-saturated silicon cluster cations Si 6 H + 13 were generated in an ion trap and deposited on Si substrates [12]. The Si 6 H + 13 cations were converted on the surface to the neutral Si 6 H 12 structure and were partially ordered at surface steps and domain boundaries [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…We have already reported that hydrogen-saturated silicon cluster cations Si 6 H + 13 were generated in an ion trap and deposited on Si substrates [12]. The Si 6 H + 13 cations were converted on the surface to the neutral Si 6 H 12 structure and were partially ordered at surface steps and domain boundaries [12,13]. Scanning tunneling spectroscopy (STS) of an isolated cluster showed characteristic peaks corresponding to resonance tunneling in discrete states of the cluster broadened by interaction with the dangling-bonds of surface atoms [13].…”

Section: Introductionmentioning

confidence: 99%

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Electronic properties of assembled islands of hydrogen-saturated silicon clusters on Si(111)-( 7 x7) surfaces studied by scanning tunneling spectroscopy

Bolotov¹,

Uchida

Kanayama

2001

The European Physical Journal D

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We present results of scanning tunneling spectroscopy (STS) measurements of hydrogensaturated silicon clusters islands formed on Si(111)-(7 × 7) surfaces. Nanometer-size islands of Si6H12 with a height of 0.2-4 nm were assembled with a scanning tunneling microscope (STM) using a tip-tosample voltage larger than 3 V. STS spectra of Si6H12 cluster islands show characteristic peaks originating in resonance tunneling through discrete states of the clusters. The peak positions change little with island height, while the peak width shows a tendency of narrowing for the tall islands. The peak narrowing is interpreted as increase of lifetime of electron trapped at the cluster states. The lifetime was as short as 10 −13 s resulting from interaction with the dangling bonds of surface atoms, which prevents charge accumulation at the cluster islands. PACS. 61.16.Ch Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc. -61.46.+w Nanoscale materials clusters, nanoparticles, nanotubes and nanocrystals -36.40.Cg Electronic and magnetic properties of clusters -73.50.-h Electronic transport phenomena in thin films

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“…The large unit cell, 2.7 nm in size, makes it a promising candidate for use as the substrate for selfassembling various adsorbates, from metals to organic molecules [1,2]. Alkali metals (AM) adsorption has received considerable attention since they possess simple hydrogen-like electronic structures and are regarded as prototypical systems [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Unusual diffusivity and clustering of alkali metals on the Si(111)-7x7 surface

2005

Science and Technology of Advanced Materials

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In this paper I review our recent experimental and theoretical works on the behaviors of submonolayer alkali metals (Li, Na, K, Cs) on the Si(111)-7x7 surface. The important aspects in the experimental preparation are discussed. While Li forms clusters even at the initial coverage, all other alkali metals (Na, K, Cs) form two-dimensional (2D) gases at room temperature and low coverage, due to their unusual high diffusivity on the surface. At higher coverage, cluster formation is observed, but with very different behaviors for Na, K, and Cs. Issues relative to the phase transition with increasing coverage are discussed: (1) the mechanism for the 2D gas formation; (2) the effect of 2D gas formation on STM observations; (3) The effect of structure on the charge transfer from alkali metals to the surface; (4) the exchange of alkali metal atoms with the Si adatoms during the cluster formation. q

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Deposition of Hydrogenated Si Clusters on Si(111)-(7×7)Surfaces

Cited by 34 publications

References 23 publications

Shallow Implantation of “Size-Selected” Ag Clusters into Graphite

Shallow Implantation of “Size-Selected” Ag Clusters into Graphite

Electronic properties of assembled islands of hydrogen-saturated silicon clusters on Si(111)-( 7 x7) surfaces studied by scanning tunneling spectroscopy

Unusual diffusivity and clustering of alkali metals on the Si(111)-7x7 surface

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