Tensile behavior of free-standing gold films. Part II. Fine-grained films

Emery, R.D.; Povirk, G.L.

doi:10.1016/s1359-6454(03)00007-7

Cited by 103 publications

(75 citation statements)

References 15 publications

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“…These values are smaller than the modulus of bulk Au, reported as 78 GPa [22,23], but very consistent with modulus values reported for most tensile experiments with Au films in the literature [3,7,13,14,19,24,25]. Different authors have attributed the smaller elastic modulus to microstructure [14] and grain boundary relaxation [24], and, in the case of significantly smaller stiffness values, to film porosity [3,26]. Film porosity has been reported to be the reason for low elastic modulus, yield strength and tensile strength 3.…”

Section: Resultssupporting

confidence: 87%

“…the elastic limit, the yield strength and the ultimate tensile strength, as shown in Fig. 6a and b, were significantly higher than the literature values at comparable strain rates [3,7,19,13,14] due to the Hall-Petch effect, which was pronounced for the particular films with $40 nm grain size [1,2,6]. Furthermore, the trends in the elastic limit, the yield strength and the ultimate tensile strength in the range of almost eight decades of strain rate in Fig.…”

Section: Rate-dependent Mechanical Behavior Of Au Filmsmentioning

confidence: 57%

“…Earlier works by Emery and Povirk [13,14], Chasiotis et al [3] and Wang and Prorok [7] presented strain rate data for Au films that spanned strain rates between 10 À6 and 10 À3 s À1 . We extended this range to about eight decades of strain rate, between 6 Â 10 À6 and 20 s À1 , spanning time scales prone to different inelastic deformation mechanisms, such as creep and dislocation plasticity.…”

Section: Resultsmentioning

confidence: 99%

“…At low temperatures this factor is small, of the order of 0.01 or smaller for microcrystalline fcc metals, while it is as high as 0.1 for body-centered cubic (bcc) metals [33]. However, recent studies reported a variety of rate sensitivity factors for nanocrystalline and ultrafine grain fcc metals, such as Au [13,14], Cu [15] and Ni [5], most of which are of the order of 0.015-0.06 [34]. The increased rate sensitivity of nanocrystalline fcc metals results in hardening and delayed shear localization [2,6,35].…”

Section: Strain Rate Sensitivity Of Nanocrystalline Au Filmsmentioning

confidence: 99%

“…To date, experiments have been limited to a small range of strain rates, typically 10 À6 -10 À3 s À1 [3,7,13,14], which, although very indicative of the existence of rate sensitivity, investigated a narrow range of strain rates and did not clearly distinguish the effects of room temperature creep [15] and anelastic stress relaxation [16], which are present at slow strain rates, on the overall deformation. Steadystate creep rates for nanocrystalline face-centered cubic (fcc) metals at room temperature have been reported to be of the order of 10 À10 -10 À7 s À1 [17,18].…”

Section: Introductionmentioning

confidence: 99%

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Strain rate sensitivity of nanocrystalline Au films at room temperature

et al. 2010

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Dimitrios, "Strain rate sensitivity of nanocrystalline Au films at room temperature" (2010) AbstractThe effect of strain rate on the inelastic properties of nanocrystalline Au films was quantified with 0.85 and 1.76 lm free-standing microscale tension specimens tested over eight decades of strain rate, between 6 Â 10 À6 and 20 s À1 . The elastic modulus was independent of the strain rate, 66 ± 4.5 GPa, but the inelastic mechanical response was clearly rate sensitive. The yield strength and the ultimate tensile strength increased with the strain rate in the ranges 575-895 MPa and 675-940 MPa, respectively, with the yield strength reaching the tensile strength at strain rates faster than 10 À1 s À1 . The activation volumes for the two film thicknesses were 4.5 and 8.1 b 3 , at strain rates smaller than 10 À4 s À1 and 12.5 and 14.6 b 3 at strain rates higher than 10 À4 s À1 , while the strain rate sensitivity factor and the ultimate tensile strain increased below 10 À4 s À1 . The latter trends indicated that the strain rate regime 10 À5 -10 À4 s À1 is pivotal in the mechanical response of the particular nanocrystalline Au films. The increased rate sensitivity and the reduced activation volume at slow strain rates were attributed to grain boundary processes that also led to prolonged (5-6 h) and significant primary creep with initial strain rate of the order of 10 À7 s À1 .

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Section: Resultssupporting

confidence: 87%

Section: Rate-dependent Mechanical Behavior Of Au Filmsmentioning

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Section: Strain Rate Sensitivity Of Nanocrystalline Au Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strain rate sensitivity of nanocrystalline Au films at room temperature

et al. 2010

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Active Chiral Plasmonics: Flexoelectric Control of Nanoscale Chirality

Gilroy

McKay

Devine

et al. 2020

Advanced Photonics Research

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The ability to electrically control the optical properties of metamaterials is an essential capability required for technological innovation. The creation of dynamic electrically tunable metamaterials in the visible and near infrared regions is important for a range of imaging and fiber optic technologies. However, current approaches require complex nanofabrication processes which are incompatible for low‐cost device production. Herein, a novel simple approach is reported for electrical control of optical properties which uses a flexoelectric dielectric element to electromechanically manipulate the form factor of a chiral nanostructure. By altering the dimensions of the chiral nanostructure, the polarization properties of light are allowed to be electrically controlled. The flexoelectric element is part of a composite metafilm that is templated onto a nanostructured polymer substrate. As the flexoelectric element does not require in situ high temperature annealing, it can be readily combined with polymer‐based substrates produced by high throughput methods. This is not the case for piezoelectric elements, routinely used in microelectromechanical (MEM) devices which require high temperature processing. Consequently, combining amorphous flexoelectric dielectrics and low‐cost polymer‐based materials provides a route to the high throughput production of electrically responsive disposable metadevices.

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Fracture in Electronics

Plumbridge

Engineering Against Fracture

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Tensile behavior of free-standing gold films. Part II. Fine-grained films

Cited by 103 publications

References 15 publications

Strain rate sensitivity of nanocrystalline Au films at room temperature

Strain rate sensitivity of nanocrystalline Au films at room temperature

Active Chiral Plasmonics: Flexoelectric Control of Nanoscale Chirality

Fracture in Electronics

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