The enhanced elastic modulus of nanowires associated with multitwins

Yoo, Jun Hwan; Oh, Sewon; Jeong, Myeong Sik

doi:10.1063/1.3354098

Cited by 28 publications

(16 citation statements)

References 38 publications

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“…Some atomistic simulations showed pronounced stiffening size effect but no apparent effect of the pentatwinned microstructure compared to the single-crystalline counterpart [181]. Other atomistic simulations revealed the similar size effect, but also showed strong effect of the pentatwinned microstructure (i.e., higher Young's modulus than that of the single-crystalline counterpart) [182,183]. The microstructure effect was attributed to the high compressive at the core of the pentatwinned NW.…”

Section: Metallic Bonding a Variety Of Methods Have Been Used To Synmentioning

confidence: 95%

Mechanics of Crystalline Nanowires: An Experimental Perspective

Zhu

2017

Applied Mechanics Reviews

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A wide variety of crystalline nanowires (NWs) with outstanding mechanical properties have recently emerged. Measuring their mechanical properties and understanding their deformation mechanisms are of important relevance to many of their device applications. On the other hand, such crystalline NWs can provide an unprecedented platform for probing mechanics at the nanoscale. While challenging, the field of experimental mechanics of crystalline nanowires has emerged and seen exciting progress in the past decade. This review summarizes recent advances in this field, focusing on major experimental methods using atomic force microscope (AFM) and electron microscopes and key results on mechanics of crystalline nanowires learned from such experimental studies. Advances in several selected topics are discussed including elasticity, fracture, plasticity, and anelasticity. Finally, this review surveys some applications of crystalline nanowires such as flexible and stretchable electronics, nanocomposites, nanoelectromechanical systems (NEMS), energy harvesting and storage, and strain engineering, where mechanics plays a key role.

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Section: Metallic Bonding a Variety Of Methods Have Been Used To Synmentioning

confidence: 95%

Mechanics of Crystalline Nanowires: An Experimental Perspective

Zhu

2017

Applied Mechanics Reviews

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“…39 It is of additional note that the embedded atom method (EAM) potential commonly used in MD simulations might underestimate the Young's modulus to certain degree. 39,40 Yield (or fracture) strength is simply equal to Young's modulus multiplied by yield (or fracture) strain. Brittle NWs such as Si and ZnO have been found to exhibit strong size effect in Young's modulus.…”

Section: Resultsmentioning

confidence: 99%

Size effects on elasticity, yielding, and fracture of silver nanowires:In situexperiments

et al. 2012

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This paper reports the first quantitative measurement of a full spectrum of mechanical properties of five-fold twinned silver (Ag) nanowires (NWs) including Young's modulus, yield strength and ultimate tensile strength. In situ tensile testing of Ag NWs with diameters between 34 and 130 nm was carried out inside a scanning electron microscope (SEM). Young's modulus, yield strength and ultimate tensile strength all increased as the NW diameter decreased. The maximum yield strength in our tests was found to be 2.64 GPa, which is about 50 times the bulk value and close to the theoretical value of Ag in the <110> orientation. The size effect in the yield strength is attributed to the increase in the Young's modulus. Yield strain scales reasonably well with the NW surface area, which reveals that yielding of Ag NWs is due to dislocation nucleation from surface sources. Pronounced strain hardening was observed for most NWs in our study. The strain hardening, which has not previously been reported for NWs, is mainly attributed to the presence of internal twin boundaries. KEYWORDSfive-fold twin, size effect, Young's modulus, yield strength, ultimate tensile strength, strain hardening

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“…This is because bulk Ag itself is one of the most ductile metals so that Ag easily accommodates tensile stress and deforms. In addition, the pentagonal Ag NW is known to have superior yield strength and size dependent elastic property (higher Young's modulus than bulk Ag)30, 31 due to the enhanced stiffness because of an internal twin boundary of the NWs 32. Secondly, a nanowelded Ag NW percolation network can more effectively accommodate the deformation without any significant conductivity change by changing the network shapes than a Ag thin film which easily ruptures into patches with electrical failure under large strain.…”

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confidence: 99%

Highly Stretchable and Highly Conductive Metal Electrode by Very Long Metal Nanowire Percolation Network

et al. 2012

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A highly stretchable metal electrode is developed via the solution-processing of very long (>100 μm) metallic nanowires and subsequent percolation network formation via low-temperature nanowelding. The stretchable metal electrode from very long metal nanowires demonstrated high electrical conductivity (~9 ohm sq(-1) ) and mechanical compliance (strain > 460%) at the same time. This method is expected to overcome the performance limitation of the current stretchable electronics such as graphene, carbon nanotubes, and buckled nanoribbons.

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The enhanced elastic modulus of nanowires associated with multitwins

Cited by 28 publications

References 38 publications

Mechanics of Crystalline Nanowires: An Experimental Perspective

Mechanics of Crystalline Nanowires: An Experimental Perspective

Size effects on elasticity, yielding, and fracture of silver nanowires:In situexperiments

Highly Stretchable and Highly Conductive Metal Electrode by Very Long Metal Nanowire Percolation Network

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