Some aspects of formation and tribological properties of silver nanodumbbells

Polyakov, Boris; Vlassov, Sergei; Dorogin, Leonid; Novoselska, Natalia; Butikova, Jeļena; Antsov, Mikk; Oras, Sven; Lõhmus, Rünno; Kink, Ilmar

doi:10.1186/1556-276x-9-186

Cited by 12 publications

(8 citation statements)

References 31 publications

(41 reference statements)

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“…It is worth noting that the shrinkage length, as Fig. 3(b) depicts, could be distinguished through the residual traces, which have also been observed by Polyakov et al 42 From the simulated temperature curve, we can see that the length of the silver nanowire where the temperature is above the melting point is around 4.4 lm, which is in good accordance with the measurement in SEM image. The conceptual interpretation can be analyzed as follows.…”

supporting

confidence: 86%

Laser-induced single point nanowelding of silver nanowires

Dai

Liu

et al. 2016

Applied Physics Letters

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Nanowelding of nanomaterials opens up an emerging set of applications in transparent conductors, thin-film solar cells, nanocatalysis, cancer therapy, and nanoscale patterning. Single point nanowelding (SPNW) is highly demanded for building complex nanostructures. In this letter, the precise control of SPNW of silver nanowires is explored in depth, where the nanowelding is laser-induced through the plasmonic resonance enhanced photothermal effect. It is shown that the illumination position is a critical factor for the nanowelding process. As an example of performance enhancement, output at wire end can be increased by 65% after welding for a plasmonic nanocoupler. Thus, single point nanowelding technique shows great potentials for high-performance electronic and photonic devices based on nanowires, such as nanoelectronic circuits and plasmonic nanodevices.

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supporting

confidence: 86%

Laser-induced single point nanowelding of silver nanowires

Dai

Liu

et al. 2016

Applied Physics Letters

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“…The morphology, and thus the contact area of the NP, can be tuned by changing the synthesis parameters [15]. For readily synthesized NPs, the morphology can be changed by adding energy to the NPs by laser treatment [16] or by heating the NPs in an oven. Partial melting can be achieved at a significantly lower temperature than the melting temperature of bulk Au [17].…”

Section: Introductionmentioning

confidence: 99%

The effect of heat treatment on the morphology and mobility of Au nanoparticles

Oras¹,

Vlassov²,

Vigonski³

et al. 2020

Beilstein J. Nanotechnol.

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In the present paper, we investigate the effect of heat treatment on the geometry and mobility of Au nanoparticles (NPs) on a Si substrate. Chemically synthesized Au NPs of diameter ranging from 5 to 27 nm were annealed at 200, 400, 600 and 800 °C for 1 h. A change in the geometry from faceted to more rounded shapes were observed with increasing annealing temperature. Kinetic Monte Carlo simulations indicate that the NPs become rounded due to the minimization of the surface area and the transition to lower energy surface types {111} and {100}. The NPs were manipulated on a silica substrate with an atomic force microscope (AFM) in tapping mode. Initially, the NPs were immovable by AFM energy dissipation. However, annealed NPs became movable, and less energy was required to displace the NPs annealed at higher temperature. However, after annealing at 800 °C, the particles became immovable again. This effect was attributed to the diffusion of Au into the Si substrate and to the growth of the SiO2 layer.

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“…The morphology and thus the contact areas of the NP can be tuned by changing the synthesis parameters [15]. For already synthesized NPs morphology can be changed by giving additional energy to the NPs by laser treatment [16] or by heating the NPs in an oven. Partial melting can be achieved at significantly lower temperature than the melting temperature of bulk Au [17].…”

Section: Introductionmentioning

confidence: 99%

The effect of heat-treatment on morphology and mobility of Au nanoparticles

Oras¹,

Vlassov²,

Polyakov³

et al. 2019

Preprint

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In the present paper we investigate the effect of heat-treatment on geometry and mobility of Au nanoparticles (NPs) on Si substrate. Chemically synthesized Au nanoparticles with median diameter of 14 nm were annealed at 200°C, 400°C, 600°C and 800°C for 1 hour. Geometry changes from faceted towards more rounded shapes were observed already for 200oC and increased further for higher temperatures. According to KCM simulations NPs become rounded through the minimization of the surface area and transitioning to lower energy surface types {111} and {100}. Next, NPs were manipulated with AFM and it was found that the higher is annealing temperature, the less energy was required to displace the particle. However, after treatment at 800°C particles became immovable. We attributed this surprising effect to diffusion of gold into Si and to the growth of SiO2.

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Some aspects of formation and tribological properties of silver nanodumbbells

Cited by 12 publications

References 31 publications

Laser-induced single point nanowelding of silver nanowires

Laser-induced single point nanowelding of silver nanowires

The effect of heat treatment on the morphology and mobility of Au nanoparticles

The effect of heat-treatment on morphology and mobility of Au nanoparticles

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