Growth of nanostructures by cluster deposition: Experiments and simple models

Jensen, Pablo

doi:10.1103/revmodphys.71.1695

Cited by 615 publications

(467 citation statements)

References 199 publications

(306 reference statements)

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“…The most efficient tool to simulate the evolution of the adisland morphology is the Kinetic Monte-Carlo (KMC [23,24,25]) method which needs as input the various rates of all the elementary atomic processes. Two types of processes are essential in this respect: the diffusion along steps (and its anisotropy between step A and step B), and the corner crossings to go from one edge to another.…”

Section: Introductionmentioning

confidence: 99%

Diffusion rates of Cu adatoms on Cu(111) in the presence of an adisland nucleated at fcc or hcp sites

et al. 2005

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The surface diffusion of Cu adatoms in the presence of an adisland at FCC or HCP sites on Cu(111) is studied using the EAM potential derived by Mishin et al. [Phys. Rev. B 63 224106 (2001)]. The diffusion rates along straight (with close-packed edges) steps with (100) and (111)-type microfacets (resp. step A and step B) are first investigated using the transition state theory in the harmonic approximation. It is found that the classical limit beyond which the diffusion rates follow

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Section: Introductionmentioning

confidence: 99%

Diffusion rates of Cu adatoms on Cu(111) in the presence of an adisland nucleated at fcc or hcp sites

et al. 2005

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“…This indicates that the onset of ordering starts at room temperature itself for these structures. The deposited silver np were then exposed to atmosphere and then annealed in vacuo at 573 K for a period of 1 hour as this leads to an approximately circular cross-section of np on account surface energy minimisation 14,25 . This is confirmed by the micrographs A, B and C which show the np morphology of the annealed samples for λ = 20 nm, 35 nm and 45 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Thermal dynamics of silver clusters grown on rippled silica surfaces

Bhatnagar

Ranjan

Jolley

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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Silver nanoparticles have been deposited on silicon rippled patterned templates at an angle of incidence of 70 • to the surface normal. The templates are produced by oblique incidence argon ion bombardment and as the fluence increases, the periods and heights of the structures increase. Structures with periods of 20 nm, 35 nm and 45 nm have been produced. Moderate temperature vacuum annealing shows the phenomenon of cluster coalescence following the contour of the more exposed faces of the ripple for the case of 35 nm and 45 nm but not at 20 nm where the silver aggregates into larger randomly distributed clusters. In order to understand this effect, the morphological changes of silver nanoparticles deposited on an asymmetric rippled silica surface are investigated through the use of Molecular Dynamics simulations for different deposition angles of incidence between 0 • and 70 • and annealing temperatures between 500K and 900K. Near to normal incidence, clusters are observed to migrate over the entire surface but for deposition at 70 • , a similar patterning is observed as in the experiment. The random distribution of clusters for the periodicity ≈ of 20 nm is linked to the geometry of the silica surface which has a lower ripple height than the longer wavelength structures. Calculations carried out on a surface with such a lower ripple height also demonstrate a similar effect.

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“…12 In non-epitaxial systems, even large Au clusters incommensurate with underlying substrates show extremely high mobility. 13 As a result, conversion of polar gold precursors, such as tetrachloroaurate, in AAO is accompanied by uncontrolled diffusion and coalescence of Au clusters, resulting in the formation of high-aspect-ratio gold plugs. 14 If solutions containing tetrachloroaurate and the block copolymer (BCP) polystyrene-block-poly(vinylpyridine) (PS-b-PVP), which are often used to generate two-dimensional arrays of gold nanostructures on smooth substrates, 15 are infiltrated into AAO, gold clusters will mainly develop at the hydroxylterminated AAO pore walls to which tetrachloroaurate and the polar PVP blocks segregate.…”

Section: Introductionmentioning

confidence: 99%

Formation of gold nanoparticles in polymeric nanowires by low-temperature thermolysis of gold mesitylene

et al. 2012

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The formation of polymer nanowires containing metal nanoparticle chains by low-temperature thermolyses of metal precursors has remained challenging. We report the block copolymer-assisted generation of locally regular chains of quasi-spherical gold nanoparticles with narrow particle diameter distribution by mild thermolysis of the non-polar gold precursor gold mesitylene inside the cylindrical nanopores of self-ordered anodic aluminium oxide (AAO). The block copolymer separates the gold mesitylene as well as the developing gold nanoparticles from the AAO pore walls so that surface nucleation and pinning of gold clusters are prevented. Growing quasi-spherical gold nanoparticles locally deform the polymer chains irreversibly adsorbed on the AAO pore walls, and the polymer chains are pushed into the space between the gold nanoparticles. The gold nanoparticles have, therefore, larger diameters and smaller specific surface than hypothetical pluglike gold entities with the same volume, the formation of which is suppressed.

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Growth of nanostructures by cluster deposition: Experiments and simple models

Cited by 615 publications

References 199 publications

Diffusion rates of Cu adatoms on Cu(111) in the presence of an adisland nucleated at fcc or hcp sites

Diffusion rates of Cu adatoms on Cu(111) in the presence of an adisland nucleated at fcc or hcp sites

Thermal dynamics of silver clusters grown on rippled silica surfaces

Formation of gold nanoparticles in polymeric nanowires by low-temperature thermolysis of gold mesitylene

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