Photoemission and electron microscopy of small supported palladium clusters

Kuhrt, C.; Harsdorff, M.

doi:10.1016/0039-6028(91)90476-9

Cited by 88 publications

(31 citation statements)

References 22 publications

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“…We observe the formation of nanoparticles for both metals. Kuhrt et al reported that transition metals are mobile and form clusters on the graphite surface, as the cohesive energy of these metals is larger than the adsorption enthalpy [22]. The nucleation centres are chemical or structural defects at the surface of the graphite surface.…”

Section: Methodsmentioning

confidence: 99%

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Platinum and palladium on carbon nanotubes: Experimental and theoretical studies

Adjizian¹,

Marco²,

Suarez-Martinez³

et al. 2013

Chemical Physics Letters

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Section: Methodsmentioning

confidence: 99%

“…The nucleation centres are chemical or structural defects at the surface of the graphite surface. Considering that both Pt and Pd have been reported to interact with oxygen atoms [22,23], it seems likely that Pt and Pd nanoparticle nucleation could occur in the proximity of oxygenated defects created by the plasma treatment.…”

Section: Methodsmentioning

confidence: 99%

Platinum and palladium on carbon nanotubes: Experimental and theoretical studies

Adjizian¹,

Marco²,

Suarez-Martinez³

et al. 2013

Chemical Physics Letters

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“…[14] On the graphitic surface, transition-metal atoms are mobile and form clusters as the cohesive energy of these metals is much larger than the adsorption enthalpy-nucleation is characterized by diffusionlimited aggregation. [15] The nucleation centres were reported to be defects (chemical or structural) at the surface, [16] but it is not a priori obvious what such surface defect species will be. In order to understand the interaction between gold and different fluorinated defect species, we used density functional calculations to model a range of fluorinated surface defects on both pristine and etched graphene sheets, and examined their interaction with individual gold atoms.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy and Defect Identification for Fluorinated Carbon Nanotubes

Bittencourt

Lier

et al. 2009

ChemPhysChem

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Finely tuned: Carbon nanotubes are exposed to a CF(4) radio-frequency plasma (see picture). High-resolution photoelectron spectroscopy shows that the treatment effectively grafts fluorine atoms onto the MWCNTs, altering the valence electronic states. Fluorine surface concentration can be tuned by varying the exposure time.Multi-wall carbon nanotubes (MWCNTs) were exposed to a CF(4) radio-frequency (rf) plasma. High-resolution photoelectron spectroscopy shows that the treatment effectively grafts fluorine atoms onto the MWCNTs, altering the valence electronic states. Fluorine surface concentration can be tuned by varying the exposure time. Evaporation of gold onto MWCNTs is used to mark active site formation. High-resolution transmission electron microscopy coupled with density functional theory (DFT) modelling is used to characterise the surface defects formed, indicating that the plasma treatment does not etch the tube surface. We suggest that this combination of theory and microscopy of thermally evaporated gold atoms onto the CNT surface may be a powerful approach to characterise both surface defect density as well as defect type.

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“…There is a subtle interplay of the interface energy, electronic band structure of the substrate, and surface corrugation. These various aspects have already been investigated in great detail, especially from the structural point of view, both experimentally [8,9,10] and theoretically [11,12,13,14,15,16,17,18]. The situation becomes even more involved when one considers the deposition dynamics itself.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of cluster deposition on Ar surface

et al. 2007

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Abstract. Using a combined quantum mechanical/classical method, we study the dynamics of deposition of small Na clusters on Ar(001) surface. We work out basic mechanisms by systematic variation of substrate activity, impact energy, cluster orientations, cluster sizes, and charges. The soft Ar material is found to serve as an extremely efficient shock absorber which provides cluster capture in a broad range of impact energies. Reflection is only observed in combination with destruction of the substrate. The kinetic energy of the impinging cluster is rapidly transfered at first impact. The distribution of the collision energy over the substrate proceeds very fast with velocity of sound. The full thermalization of ionic and atomic energies goes at a much slower pace with times of several ps. Charged clusters are found to have a much stronger interface interaction and thus get in significantly closer contact with the surface.

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Photoemission and electron microscopy of small supported palladium clusters

Cited by 88 publications

References 22 publications

Platinum and palladium on carbon nanotubes: Experimental and theoretical studies

Platinum and palladium on carbon nanotubes: Experimental and theoretical studies

Spectroscopy and Defect Identification for Fluorinated Carbon Nanotubes

Dynamics of cluster deposition on Ar surface

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