Welding of gold nanowires with different joining procedures

Guo, Jiyuan; Xu, Chun; Hu, Anming; Shi, Zhongtao; Sheng, Feng; Dai, Jun; Li, Z. H.

doi:10.1007/s11051-011-0666-7

Cited by 15 publications

(13 citation statements)

References 42 publications

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“…A further decay of stress occurs when the temperature reaches 900 K. At this relatively high temperature, the stress remains negative due to a structural transition from a crystal into a disordered structure (molten phase). A similar result was reported in the study of Guo et al 25 They also found that the molten temperature of NWs decreased with decreasing NW size. A similar trend for the temperature effect on welding stress can be seen for SC-amorphous and amorphous-amorphous NW pairs, as shown in Figs.…”

Section: B Welding Of Amorphous Nwssupporting

confidence: 89%

Atomistic simulations of nanowelding of single-crystal and amorphous gold nanowires

Fang

2015

Journal of Applied Physics

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The mechanism and quality of the welding of single-crystal (SC) and amorphous gold nanowires (NWs) with head-to-head contact are studied using molecular dynamics simulations based on the second-moment approximation of the many-body tight-binding potential. The results are discussed in terms of atomic trajectories, slip vectors, stress, and radial distribution function. Simulation results show that the alignment for the amorphous NWs during welding is easier than that for the SC NWs due to the former's relatively stable geometry. A few dislocations nucleate and propagate on the (111) close-packed plane (slip plane) inside the SC NWs during the welding and stretching processes. During welding, an incomplete jointing area first forms through the interactions of the van der Waals attractive force, and the jointing area increases with increasing extent of contact between the two NWs. A crystallization transition region forms in the jointing area for the welding of SC-amorphous or amorphous-SC NWs. With increasing interference, an amorphous gold NW shortens more than does a SC gold NW due to the former's relatively poor strength. The pressure required for welding decreases with increasing temperature. V C 2015 AIP Publishing LLC.

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Section: B Welding Of Amorphous Nwssupporting

confidence: 89%

Atomistic simulations of nanowelding of single-crystal and amorphous gold nanowires

Fang

2015

Journal of Applied Physics

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“…At 900 K, however, no significant bucking appears, and most atoms have high-slip vectors, indicating the formation of a molten phase. A similar result was reported in the study of Guo et al [18]. They also found that the molten temperature of NWs decreased with decreasing their size.…”

Section: Molecular Simulationsupporting

confidence: 89%

“…They found that NWs with smaller diameters have higher welding strength. Guo et al [18] modelled the welding of Au NWs with different jointing procedures at various annealing temperatures using Monte Carlo simulation. They found that the atomic queues of the welded NWs gradually distort and become disordered when the temperature increases.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on welding of metallic nanowires investigated using molecular dynamics simulations

Fang

2015

Molecular Simulation

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The mechanism of welding of Au-Au, Ag -Ag and Au -Ag nanowires (NWs) with head-to-head contact is studied using molecular dynamics simulations based on the second-moment approximation of the many-body tight-binding potential. The effect of temperature in the range of 300-900 K is investigated. Simulation results show that at the initial welding, an incomplete jointing area forms through the interactions of the van der Waals attractive force, and that the jointing area increases with increasing the extent of contact between the two NWs during the welding process and temperature. Few defects form along the (1 1 1) close-packed plane during the welding process because the acting stress is quite low. Among the three NW pairs, the Au -Au NWs have the best cold-welding quality, whereas the Au-Ag NWs have the worst coldwelding quality due to the welding of different materials. With an increase in temperature, the weld stress and the mechanical strength of the NWs significantly decrease, and the number of disordered structures increases. The welding fails when the temperature exceeds the molten temperature of the NWs.

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“…Although sintering processes proceed without melting in most cases, the decrease of melting temperature in nanoparticles (T m ) can contribute to the decreasing of sintering temperature compared with bulk sintering. Based on modified versions of the Debye model for size dependence of melting point58,59 , it can be shown that the sintering of nanoparticles is enhanced by the suppression of the melting point T m , which is reduced from that of the bulk material melting point (T mb ) by a factor as follows where D is the particle diameter and δ is a material dependent parameter with reported Monte Carlo and molecular dynamic simulations show even lower temperatures down to a few Kelvins[67][68][69] . The reduction of the influence factor from 0.8 to 0.3 is attributed to the larger driving force for nanoparticles as previously mentioned and further reduces the joining temperatures.…”

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confidence: 99%

Joining of Silver Nanomaterials at Low Temperatures: Processes, Properties, and Applications

Peng¹,

Gerlich³

et al. 2015

ACS Appl. Mater. Interfaces

301

121

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A review is provided, which first considers low-temperature diffusion bonding with silver nanomaterials as filler materials via thermal sintering for microelectronic applications, and then other recent innovations in low-temperature joining are discussed. The theoretical background and transition of applications from micro to nanoparticle (NP) pastes based on joining using silver filler materials and nanojoining mechanisms are elucidated. The mechanical and electrical properties of sintered silver nanomaterial joints at low temperatures are discussed in terms of the key influencing factors, such as porosity and coverage of substrates, parameters for the sintering processes, and the size and shape of nanomaterials. Further, the use of sintered silver nanomaterials for printable electronics and as robust surface-enhanced Raman spectroscopy substrates by exploiting their optical properties is also considered. Other low-temperature nanojoining strategies such as optical welding of silver nanowires (NWs) through a plasmonic heating effect by visible light irradiation, ultrafast laser nanojoining, and ion-activated joining of silver NPs using ionic solvents are also summarized. In addition, pressure-driven joining of silver NWs with large plastic deformation and self-joining of gold or silver NWs via oriented attachment of clean and activated surfaces are summarized. Finally, at the end of this review, the future outlook for joining applications with silver nanomaterials is explored.

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Welding of gold nanowires with different joining procedures

Cited by 15 publications

References 42 publications

Atomistic simulations of nanowelding of single-crystal and amorphous gold nanowires

Atomistic simulations of nanowelding of single-crystal and amorphous gold nanowires

Effect of temperature on welding of metallic nanowires investigated using molecular dynamics simulations

Joining of Silver Nanomaterials at Low Temperatures: Processes, Properties, and Applications

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