Surface Energy Driven Agglomeration and Growth of Single Crystal Metal Wires

Jung, Soon Jung; Lutz, Tarek; Boese, Markus; Holmes, Justin D.; Boland, John J.

doi:10.1021/nl104357e

Cited by 22 publications

(32 citation statements)

References 46 publications

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“…Many of the wires were observed to sprout from these agglomerated particles suggesting the particles behaved as nucleation and crystal growth centres for the newly formed wires, in a manner similar to that of VLS. It also was demonstrated that introducing ion beam lithography defined holes into the film prior to annealing made it possible to have a degree of control over the positioning and growth of the subsequently grown wires 14 . The phenomena led to the formation of 'agglomeration waves' but the physical origin was not understood at that time.…”

Section: Characteristics Of the Sedg Methodsmentioning

confidence: 99%

Metal Nanostructure Synthesis via Surface Energy Driven Growth

O’Kelly

Jung

Boland

2016

Crystal Growth & Design

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Identifying new synthesis methods to produce single crystal metal nanowires has the potential to expand nanowire based technology integration and increase applications. The catalogue of single crystal metal nanostructures is rather limited compared to the range of high aspect semiconductor nanowires synthesized via well-established vapor liquid solid and atomic layer deposition methods. The surface energy driven growth (SEDG) method opens new possibilities for producing novel metal nanostructures. The method, based on the relative surface energy of the components involved in the synthesis is presented as a standalone method for producing high aspect ratio single crystal metal nanowires. Wire growth is realized following eutectic temperature annealing of individual thin films that make up binary alloy systems. In response to thermal annealing the high surface energy component is observed to crystallize and form wire structures directly form the bilayer material without the introduction of growth precursors. The potential of this growth method has been demonstrated in the several recent examples of nanostructures synthesized using SEDG. Focus here will be on generalizing the method to enable future synthesis via this new method. Controlled positioning of the growth can be achieved through manipulation of dewetting phenomena to control mass flow and facilitated by the placement of defects that nucleate the de-wetting phenomenon. The physical principles dictating the growth method are covered in detail to enable fine control over positioning and dewetting during growth. The principles of the method are presented together in detail for the first time with the aim of increasing the accessibility of the method for the wider scientific community.

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Section: Characteristics Of the Sedg Methodsmentioning

confidence: 99%

Metal Nanostructure Synthesis via Surface Energy Driven Growth

O’Kelly

Jung

Boland

2016

Crystal Growth & Design

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“…The increased aggregation of ground talc with 0.1 mm balls than with 1 mm or 2 mm balls could be related to the degree of dispersion in the aqueous solution used in the particle size analysis. The aggregation of ultrafine particles generally occurs in order to reduce the high surface energy [34,35]. The talc powders with a similar surface area and different aggregation behavior indicate that these ground talc powders have a different surface energy and/or property.…”

Section: Aggregation Of Ground Talcmentioning

confidence: 99%

Effects of Ball Size on the Grinding Behavior of Talc Using a High-Energy Ball Mill

Kim

et al. 2019

Minerals

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The properties and preparation of talc have long been investigated due to its diverse industrial applications, which have expanded recently. However, its comminution behavior is not yet fully understood. Therefore, having better control of the particle size and properties of talc during manufacturing is required. In this study, we investigate the effect of the ball size in a high-energy ball mill on the comminution rate and particle size reduction. High-energy ball milling at 2000 rpm produces ultrafine talc particles with a surface area of 419.1 m2/g and an estimated spherical diameter of 5.1 nm. Increasing the ball size from 0.1 mm to 2 mm increases the comminution rate and produces smaller talc particles. The delamination of (00l) layers is the main comminution behavior when using 1 mm and 2 mm balls, but both the delamination and rupture of (00l) layers occurs when using 0.1 mm balls. The aggregation behavior of ground talc is also affected by the ball size. Larger aggregations form in aqueous solution when ground with 0.1 mm balls than with 1 mm or 2 mm balls, which highlights the different hydro-phobicities of ground talc. The results indicate that optimizing the ball size facilitates the formation of talc particles of a suitable size, crystallinity, and aggregation properties.

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“…Ge will phase separate from Au upon cooling due to the differences in their surface energies 147 and depending on the amount of Au present, a variety of structures ranging from pyramid shaped nanoislands to uniform core-shell structures can be formed, as shown in figure 8. The formation of various nanostructures (which included islands, periodic nanodisks and core-shell structures) was explained by the phase diagram 142 , with the authors controlling the atomic percentage of Au and thermal annealing above the eutectic temperature.…”

Section: The Au/ge Systemmentioning

confidence: 99%