Beat phenomenon in metal nanowires: A molecular dynamics study

Zheng, Zhuoqun; Li, Eric; Ding, Nan; Xu, Xu

doi:10.1016/j.commatsci.2017.06.024

Cited by 7 publications

(2 citation statements)

References 31 publications

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“…In molecular dynamics (MD) simulations context, some res earchers [119,[362][363][364][365][366] showed that beat phenomenon (or the flexural mode doublets) in nanowire (NW) resonators not only may originate from the geometrical asymmetries but also from the asymmetric lattice arrangements in lateral directions. They found that the dual orthogonal flexural mode can be effectively tuned by selecting the proper growth direction in NWs, which creates two different principal moments of inertia.…”

Section: Linear Modal Coupling: Single Resonatorsmentioning

confidence: 99%

A Comprehensive Categorization of Micro/Nanomechanical Resonators and Their Practical Applications from an Engineering Perspective: A Review

Ghaemi

Nikoobin

Ashory

2022

Adv Elect Materials

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Micro/nanoelectromechanical systems (M/NEMS), especially micro/nanomechanical resonators, provide an unprecedented platform for investigating a wide range of applications in both fundamental physical phenomena (such as quantum‐level problems) and engineering and applied sciences (like sensing physical quantities and signal processing). In sensing context, these tiny resonators are invaluable tools for detecting weak forces and single molecules. Measuring such small variations in sub‐nanometer amplitudes at high frequencies has created many practical challenges. Therefore, maximizing the responsivity to a specified input parameter and minimizing the responsivity to other inputs such as noise are considered as the optimal design for the excellent performance in nanoresonators. The present review aims to summarize some of the recent progress in this rapidly advancing field. Specifically, more attention is paid to the topics related to the dynamical behaviors of micro/nanoresonator and their practical applications. First, the theory behind micro/nanoresonators is described. Then a summary is presented of the basic concepts in resonant devices. In addition, several commonly dynamical techniques to enhance sensitivity are introduced. Finally, the devices are classified based on linear and nonlinear, single and array, symmetric and asymmetric, and frequency shift‐based and amplitude shift‐based resonators, along with the relative advantages and disadvantages of each one in engineering applications.

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Section: Linear Modal Coupling: Single Resonatorsmentioning

confidence: 99%

A Comprehensive Categorization of Micro/Nanomechanical Resonators and Their Practical Applications from an Engineering Perspective: A Review

Ghaemi

Nikoobin

Ashory

2022

Adv Elect Materials

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“…Conley et al have studied it theoretically [14] and Gil-Santos et al have used it for mass sensing and stiffness spectroscopy [6]. In the nanowire's two-dimensional vibration, beat phenomenon is a special physical characteristic, which was reported and investigated recently [21,22,31,32]. However, little attention has been paid to another tough and useful problem -the nonlinear vibration behaviors of nanowires, especially the Fe nanowires.…”

Section: Introductionmentioning

confidence: 99%

A Molecular Dynamic Study on Nonlinear Vibration Behaviors of Fe Nanowires

Zheng

Ding

et al. 2018

Int. J. Comput. Methods

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In this paper, vibration behaviors of Fe nanowires are investigated by using the large-scale molecular dynamics (MD) simulations. It is observed that the vibration frequency of nanowires rises slightly and nonlinearly with the increase of initial actuation amplitude. Based on the atomic arrangement, a discrete spring-mass model is developed. Its nonlinear elastic relation is used to explain this phenomenon. In addition, Fe nanowires with different lengths and heights show different vibration properties in this work. The ratio between the length ([Formula: see text]) and the height ([Formula: see text]) of nanowires has a significant influence on vibration behaviors. The vibration properties of nanowires can be explained by the Euler–Bernoulli model when the ratio is relatively large, while they can be illustrated by the Timoshenko model when the ratio is relatively small.

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Edge Dislocation and Grain Boundaries Effects on the Mechanical Properties in NiCoAl$N i C o A l$ Medium Entropy Alloy

Khan,

Ali

2024

Adv Eng Mater

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Medium‐entropy alloys (MEAs) are becoming increasingly popular owing to their superior mechanical features. Using molecular dynamics (MD) simulations, we, for the first time, investigate in this work how grain boundaries (GBs) and dislocations affect the mechanical properties of face‐centered cubic (FCC) equiatomic NiCoAl MEA. We analyze lattice distortion, elastic constants and moduli, machinability index, Vickers hardness, and Kleinman parameters to explore how grain boundaries affect NiCoAl MEA. It tends to become more rigid based on the link between its elastic moduli and GBs. Interestingly, our analyses of Cauchy pressure, Poisson’s, and Pugh’s ratios all indicate the ductility of the studied MEA. The investigation of anisotropy factors indicates that NiCoAl MEA exhibits anisotropy, which is reduced by the addition of GBs. Mechanical properties of our considered MEA, such as ductility, fracture toughness, and stability, are significantly influenced by the GBs. Our results show that studying these phenomena can help us design structural nano‐metal materials with superior mechanical properties, allowing them to be used in various applications.This article is protected by copyright. All rights reserved.

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Beat phenomenon in metal nanowires: A molecular dynamics study

Cited by 7 publications

References 31 publications

A Comprehensive Categorization of Micro/Nanomechanical Resonators and Their Practical Applications from an Engineering Perspective: A Review

A Comprehensive Categorization of Micro/Nanomechanical Resonators and Their Practical Applications from an Engineering Perspective: A Review

A Molecular Dynamic Study on Nonlinear Vibration Behaviors of Fe Nanowires

Edge Dislocation and Grain Boundaries Effects on the Mechanical Properties in NiCoAl$N i C o A l$ Medium Entropy Alloy

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