Effects of grain size and thermodynamic energy on the lattice parameters of metallic nanomaterials

Yu, Xiaohua; Rong, Ju; Zhan, Zhaolin; Liu, Zhong; Liu, Jianxiong

doi:10.1016/j.matdes.2015.06.019

Cited by 46 publications

(12 citation statements)

References 42 publications

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“…The observed lattice contraction is so strong such that it cannot be fitted to the regular surface stress effect that is welldocumented for conventional gold nanocrystals (Figure 1m). 20,21 A similar lattice contraction was also observed from XRD results in gold nanosheets of other thicknesses. As shown in Figure S2a, the diffraction peaks of the gold nanosheets all shift slightly to higher angles as the thickness of the nanosheet is reduced, which corresponds to a decreasing d-spacing.…”

supporting

confidence: 78%

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Zhang

et al. 2022

Nano Lett.

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The structural and mechanical properties of low-dimensional nanostructured metals have been attracting tremendous interest in the fast-growing fields of nanosciences and nanotechnologies. However, it still remains a challenge today to develop strong yet ductile low-dimensional metals that can support the further development of nanodevices. Here, through the polymer-assisted assembly of gold nanocrystals, we successfully fabricated the freestanding, ultrathin gold nanomaterial. Unlike conventional bulk gold or other low-dimensional gold nanostructures (i.e., nanowires and nanosheets), these gold nanosheets are composed of highly distorted gold nanocrystals that are 3–5 nm in size, which are joined together through nanosized amorphous carbon interphases. As a result, the gold nanosheets exhibit superb strength (up to 1.2 GPa), excellent ductility (>50%), and superior fracture toughness (>100 J/m2), outperforming various gold nanostructures hitherto reported.

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supporting

confidence: 78%

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Zhang

et al. 2022

Nano Lett.

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“…It is stated that the Debye temperature decreases for nanomaterials as the size decreases. The effects of particle size and thermodynamic energy, based on surface thermodynamics and the atomic bond energy, were used to calculate the mechanical properties, such as surface tension and Young's modulus of nanocrystals [17,18]. The cohesive energy is the basic thermodynamic property used to predict melting temperature, melting enthalpy, melting entropy and specific heat of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Effects of size and shape on the specific heat, melting entropy and enthalpy of nanomaterials

Singh

Lara

Tlali

2017

Journal of Taibah University for Science

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A simple theory is proposed to study the size-and shape-dependent specific heat, melting entropy and enthalpy of nanomaterials. The particle size and shape are demonstrated to affect the specific heat, melting entropy and enthalpy of nanomaterials. The model is applied to Ag, Cu, In, Se, Au and Al nanomaterials in spherical, nanowire and nanofilms shapes. The specific heat is observed to increase with the decrease in particle size, whereas the melting entropy and enthalpy decrease as the particle size decreases. Our theoretical predictions agree well with available experimental and computer simulation results, thereby supporting the validity of formulation developed.

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“…Another explanation for the test results is that the small particles inside nanomaterials cause great surface tension, which induces lattice distortion and the lattice constant to decrease [ 30 , 31 ]. The smaller the particle size, the more atoms there are on the surface layer, indicating a serious lack of coordination among surface atoms.…”

Section: Discussionmentioning

confidence: 99%

Effect of Surface Morphology Changes on Optical Properties of Silicon Nanowire Arrays

Wang

Huang

Zhao

2022

Sensors

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The optical properties of silicon nanowire arrays (SiNWs) are closely related to surface morphology due to quantum effects and quantum confinement effects of the existing semiconductor nanocrystal. In order to explore the influence of the diameters and distribution density of nanowires on the light absorption in the visible to near infrared band, we report the highly efficient method of multiple replication of versatile homogeneous Au films from porous anodic aluminum oxide (AAO) membranes by ion sputtering as etching catalysts; the monocrystalline silicon is etched along the growth templates in a fixed proportion chemical solution to form homogeneous ordered arrays of different morphology and distributions on the surface. In this system, we demonstrate that the synthesized nanostructure arrays can be tuned to exhibit different optical characteristics in the test wavelength range by adjusting the structural parameters of AAO membranes.

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Effects of grain size and thermodynamic energy on the lattice parameters of metallic nanomaterials

Cited by 46 publications

References 42 publications

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Strong, Ductile, and Tough Nanocrystal-Assembled Freestanding Gold Nanosheets

Effects of size and shape on the specific heat, melting entropy and enthalpy of nanomaterials

Effect of Surface Morphology Changes on Optical Properties of Silicon Nanowire Arrays

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