Kinetics of length-scale dependent plastic deformation of gold microspheres

Islam, Anam; Klassen, Robert D.

doi:10.1557/jmr.2017.223

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…The plasticity limit for gold is P f = 0.205 GPa but for nanosized samples it can be somewhat larger [56,66]. For h 0 = nw + h c used to calculate the force in Figure 4, where n = 3.5, 4 , 5 we find A W = (2.29, 4.68, 29.4) × 10 3 nm/GPa.…”

Section: Finite Compliance Of the Substratementioning

confidence: 88%

Measuring the Casimir Forces with an Adhered Cantilever: Analysis of Roughness and Background Effects

2021

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Technological progress has made possible precise measurements of the Casimir forces at distances less than 100nm. It has enabled stronger constraints on the non-Newtonian forces at short separations and improved control of micromechanical devices. Experimental information on the forces below 30nm is sparse and not precise due to pull-in instability and surface roughness. Recently, a method of adhered cantilever was proposed to measure the forces at small distances, which does not suffer from the pull-in instability. Deviation of the cantilever from a classic shape carries information on the forces acting nearby the adhered end. We calculate the force between a flat cantilever and rough Au plate and demonstrate that the effect of roughness dominates when the bodies approach the contact. Short-distance repulsion operating at the contact is included in the analysis. Deviations from the classic shape due to residual stress, inhomogeneous thickness of the cantilever, and finite compliance of the substrate are analysed. It is found that a realistic residual stress gives a negligible contribution to the shape, while the finite compliance and inhomogeneous thickness give measurable contributions that have to be subtracted from the raw data.

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Section: Finite Compliance Of the Substratementioning

confidence: 88%

Measuring the Casimir Forces with an Adhered Cantilever: Analysis of Roughness and Background Effects

2021

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Rapid fabrication and interface structure of highly faceted epitaxial Ni-Au solid solution nanoparticles on sapphire

et al. 2021

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Nanoscale goldbeating: Solid-state transformation of 0D and 1D gold nanoparticles to anisotropic 2D morphologies

Tanjil,

Gupta,

Gole

et al. 2023

PNAS Nexus

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Goldbeating is the ancient craft of thinning bulk gold into gossamer leaves. Pioneered by ancient Egyptian craftsmen, modern mechanized iterations of this technique can fabricate sheets as thin as ∼100 nm. We take inspiration from this millennia-old craft and adapt it to the nanoscale regime, using colloidally-synthesized 0D/1D gold nanoparticles (AuNPs) as highly ductile and malleable nanoscopic gold ingots and subjecting them to solid-state, uniaxial compression. The applied stress induces anisotropic morphological transformation of AuNPs into 2D leaf form and elucidates insights into metal nanocrystal deformation at the extreme length scales. The induced 2D morphology is found to be dependent on the precursor 0D/1D nanoparticle morphology, size (0D nanosphere diameter and 1D nanorod diameter and length), and their on-substrate arrangement (e.g., interparticle separation, packing order) prior to compression. Overall, this versatile and generalizable solid-state compression technique enables new pathways to synthesize and investigate the anisotropic morphological transformation of arbitrary nanoparticles and their resultant emergent phenomena.

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Kinetics of length-scale dependent plastic deformation of gold microspheres

Abstract: Abstract

Cited by 5 publications

References 48 publications

Measuring the Casimir Forces with an Adhered Cantilever: Analysis of Roughness and Background Effects

Measuring the Casimir Forces with an Adhered Cantilever: Analysis of Roughness and Background Effects

Rapid fabrication and interface structure of highly faceted epitaxial Ni-Au solid solution nanoparticles on sapphire

Nanoscale goldbeating: Solid-state transformation of 0D and 1D gold nanoparticles to anisotropic 2D morphologies

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