Morphology control of the supported islands grown from soft-landed clusters

Yoon, Bokwon; Akulin, V. M.; Cahuzac, Ph.; Carlier, F.; Frutos, M. de; Masson, A.; Mory, C.; Colliex, C.; Bréchignac, C.

doi:10.1016/s0039-6028(99)00988-7

Cited by 118 publications

(108 citation statements)

References 38 publications

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“…Aggregation of the NPs was also observed with scanning TEM-high angle annular dark field (STEM-HAADF) ( Figure 2a) and TEM (see also Supporting Information File 1). Areas with different crystal domains were observed and are evidently caused by crystal twinning, which occurs during the NP growth process [28] or by formation of NP agglomerates with different crystal orientations after deposition and diffusion on the substrate [29][30][31]. Figure 2b shows an atomic resolution TEM image of a single NP.…”

Section: Resultsmentioning

confidence: 99%

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiOx

D’Addato¹,

Pinotti²,

Spadaro³

et al. 2016

Nano Online

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Ag and Ag@MgO core-shell nanoparticles (NPs) with a diameter of d = 3-10 nm were obtained by physical synthesis methods and deposited on Si with its native ultrathin oxide layer SiO x (Si/SiO x ). Scanning electron microscopy and transmission electron microscopy (TEM) images of bare Ag NPs revealed the presence of small NP aggregates caused by diffusion on the surface and agglomeration. Atomic resolution TEM gave evidence of the presence of crystalline multidomains in the NPs, which were due to aggregation and multitwinning occurring during NP growth in the nanocluster source. Co-deposition of Ag NPs and Mg atoms in an oxygen atmosphere gave rise to formation of a MgO shell matrix surrounding the Ag NPs. The behaviour of the surface plasmon resonance (SPR) excitation in surface differential reflectivity (SDR) spectra with p-polarised light was investigated for bare Ag and Ag@MgO NPs. It was shown that the presence of MgO around the Ag NPs caused a red shift of the plasmon excitation, and served Beilstein J. Nanotechnol. 2015, 6, 404-413. 405 to preserve its existence after prolonged (five months) exposure to air, realizing the possibility of technological applications in plasmonic devices. The Ag NP and Ag@MgO NP film features in the SDR spectra could be reproduced by classical electrodynamics simulations by treating the NP-containing layer as an effective Maxwell Garnett medium. The simulations gave results in agreement with the experiments when accounting for the experimentally observed aggregation.

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Section: Resultsmentioning

confidence: 99%

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiOx

D’Addato¹,

Pinotti²,

Spadaro³

et al. 2016

Nano Online

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“…The The final size distribution, shape, and morphology of the deposited clusters are defined by the interplay between the dynamics of the doped He droplet impact [29][30] , the nature of the substrate surface, cluster aggregation [37][38][39] , secondary processes 40 , and the TEM imaging procedure itself [23][24] . As discussed earlier, Ag N clusters may experience some considerable translation along the surface during the droplet impact prior to adsorption, contributing to the mobility of the clusters on the surface and increasing the possibility of cluster aggregation.…”

Section: Cluster Size Distributionmentioning

confidence: 99%

Surface Deposition and Imaging of Large Ag Clusters Formed in He Droplets

2011

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The utility of a continuous beam of He droplets for the assembly and surface deposition of Ag N clusters, ~ 300 -6 000, is studied with transmission electron microscopy. Images of the clusters on amorphous carbon substrates obtained at short deposition times have provided for a measure of the size distribution of the metal clusters. The average sizes of the deposited clusters are in good agreement with an energy balance based estimate of Ag N cluster growth in He droplets. Measurements of the deposition rate indicate that upon impact with the surface the Heembedded cluster is attached with high probability. The stability of the deposited clusters on the substrate is discussed.

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“…This kind of growth has been largely stud ied in the literature both experimentally and with theoretical models (DDA, DepositionDiffusion-Aggregation [4,14,15]). Therefore, d ifferences between structures observed on Au(111) and HOPG in the same deposition conditions (i.e.…”

Section: Stmmentioning

confidence: 99%

Different W cluster deposition regimes in pulsed laser ablation observed by in situ scanning tunneling microscopy

et al. 2007

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We report on how different cluster deposition regimes can be obtained and observed by in situ Scanning Tunneling Microscopy (STM) by exploiting deposition parameters in a pulsed laser deposition (PLD) process. Tungsten clusters were produced by nanosecond Pulsed Laser Ablation in Ar atmosphere at different pressures and deposited on Au (111) and HOPG surfaces. Deposition regimes including cluster deposition-diffusion-aggregation (DDA), cluster melting and coalescence and cluster im plantation were observed, depending on background gas pressure and target-to-substrate distance which influence the kinetic energy of the ablated species. These parameters can thus be easily employed for surface modification by cluster bombardment, deposition of supported clusters and growth of films with different morphologies. The variation in cluster mobility on different substrates and its influence on aggregation and growth mechanisms has also been investigated.

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Morphology control of the supported islands grown from soft-landed clusters

Cited by 118 publications

References 38 publications

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiOx

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiOx

Surface Deposition and Imaging of Large Ag Clusters Formed in He Droplets

Different W cluster deposition regimes in pulsed laser ablation observed by in situ scanning tunneling microscopy

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