Electronic excitations induced by the impact of coinage metal ions and clusters on a rare gas matrix: Neutralization and luminescence

Harbich, W.; Sieber, Christoph; Meiwes‐Broer, Karl‐Heinz; Félix, Christian

doi:10.1103/physrevb.76.104306

Cited by 10 publications

(10 citation statements)

References 52 publications

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“…This corroborates the relevance of caging through a rigid shell of atoms, moieties or solvent molecules. In fact, deposition of metal clusters into argon matrices and argon droplets has made the observation of photoluminescence possible (Felix et al, 2001;Sieber et al, 2004;Conus et al, 2006;Harbich et al, 2007). Argon shells have also been used to cage oxygen molecules; the observed luminescence was attributed to oxygen atoms that had first dissociated but were then forced, by the cage, to recombine (Laarmann et al, 2008).…”

Section: Fundamental Concepts For Producing Fluorescent Nanoscale Silmentioning

confidence: 99%

Fluorescent silicon clusters and nanoparticles

Haeften¹

2017

Silicon Nanomaterials Sourcebook

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Clusters, consisting of a small number of atoms, have been in the focus of physical and chemical research for several decades. They often show dramatic size effects. The addition of a single atoms can change their properties rather abruptly because of, for example, the discreteness of shell filling (Knight et al., 1984) or sphere-packing effects (Echt et al., 1981). When clusters become larger and reach the nanometre scale, other effects are observed, such as quantum confinement; The intense red fluorescence observed for nanostructured silicon (Canham, 1990;Cullis and Canham, 1991;Wilson et al., 1993;Lockwood, 1994;Cullis et al., 1997) is a popular and frequently cited example of this effect.The discovery of fluorescent nanoscale silicon at room temperature by Canham (Canham, 1990) increased the already quite intense research into silicon clusters where n is the principal quantum number,h the reduced Planck (or Dirac) constant and m e the electron mass. The quantum number, n, is indexed from n = 1, and the energy difference E(n = 2) and E(n = 1) would be equivalent to the fluorescence energy from the first excited state to the ground state.The analogy of the one-dimensional model can be straightforwardly extended

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Section: Fundamental Concepts For Producing Fluorescent Nanoscale Silmentioning

confidence: 99%

Fluorescent silicon clusters and nanoparticles

Haeften¹

2017

Silicon Nanomaterials Sourcebook

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“…In other words, one scales the events by the``partial energy (energy/atom)''. The complicated processes like charge-changes in deexcitation 11) cannot be calculated using a classical MD calculation.…”

Section: The Onset Of the Cluster Beam Sciencementioning

confidence: 99%

“…The non-radiative decay was partly known from the secondary electron emission after a cluster bombardment with a speed of 0.89 v 0 ¿2.83 v 0 16) or 0.5 v 0 ¿2.5 v 0 34) . Even with a low energy cluster bombardment of about 10 eV, exciton luminescence was observed in the neutralization when the Ag ＋ n (n＝1, 2, 3) clusters were colliding with a metal surface covered by a layer of rare gas 11) .…”

Section: Relaxation Stage After Excitation Characterized By Denser Camentioning

confidence: 99%

Interactions of the Cluster Beams with Solid Surfaces

Nakagawa

2009

J. Vac. Soc. Jpn.

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The characteristics of a cluster beam interaction with a solid target are reviewed from the viewpoint of computer simulation. The similarity and dissimilarity of irradiation eŠects between single and cluster ion beams are the main emphasis of the review. The speed-range of a projectile studied is below the Bethe range (v 1 Ãv 0 Z 1) but not so low, where electronic energy loss is sig-niˆcant. Because of the multiple collisions (in time and space) a classical molecular dynamic simulation is useful, whereas the multiplicity in energy is more signiˆcant for a molecular projectile. Here the collision stage of energy transfer from a projectile to target during the collision stage is separated from the succeeding relaxation stage. The multiplicity in the collision stage can cause molecular eŠects, however they are not always so signiˆcant. In the relaxation stage a somewhat enhanced eŠect can occur when the locally deposited energy exceeds a certain level.

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“…In both cases, we shall explore in particular the impact of charge, either because the deposited species is charged, or because the embedded cluster acts as a chromophore in a laser field and thus quickly acquires charge after irradiation. This exploration is focused on theoretical aspects but is qualitatively closely related to recent experiments in which the deposition of charged Ag clusters on a Ar matrix, itself deposited on a Au surface has been studied [37,38]. It was shown in this experiment that the substrate, in spite of its a priori inert character, acquires a substantial inner excitation which plays a key role in the whole process.…”

Section: Introductionmentioning

confidence: 95%

Dipole excitations of Ar substrate in contact with Na clusters

2009

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e analyze the excitation of Ar substrate in contact with Na clusters using a previously developed hierarchical model for the description of the system constituted of a highly reactive metal cluster in contact with a rather inert substrate. Particular attention is paid to the dipole excitation of the Ar atoms and the energy stored therein. The Na clusters are considered at different charge states, anions, cations, and neutral clusters for the case of deposition and a highly ionized cluster embedded in a matrix. It is found that the dipole polarization of the Ar atoms stores the largest fraction of energy in the case of charged clusters. Some, although smaller, polarization is also observed for polar clusters, as Na$_6$. The effect is predominantly induced by the electrostatic interaction.Comment: 7 pages, 8 figure

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Electronic excitations induced by the impact of coinage metal ions and clusters on a rare gas matrix: Neutralization and luminescence

Cited by 10 publications

References 52 publications

Fluorescent silicon clusters and nanoparticles

Fluorescent silicon clusters and nanoparticles

Interactions of the Cluster Beams with Solid Surfaces

Dipole excitations of Ar substrate in contact with Na clusters

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