Dynamic pull-in instability of double-sided actuated nano-torsional switches

Sedighi, Hamid M.; Shirazi, Kourosh Heidari

doi:10.1016/s0894-9166(15)60019-2

Cited by 43 publications

(19 citation statements)

References 25 publications

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“…For the case of R ≫ D, Eq. 18reduces to By replacing D with D-w in relations (15), (17) and using Eq. (19), f ext can be defined as…”

Section: U-shaped Structurementioning

confidence: 99%

“…By considering the deflection of the nanowire and replacing D with D-w in Eqs. (15) and 17, f elec1 and f vdW1 can be derived. Similarly f elec2 and f vdW2 can be obtained by substituting D with ξD + w in relations (15) and (17).…”

Section: Double-sided Structurementioning

confidence: 99%

“…(15) and 17, f elec1 and f vdW1 can be derived. Similarly f elec2 and f vdW2 can be obtained by substituting D with ξD + w in relations (15) and (17). The boundary conditions for the double-sided sensor are defined as traction free at the free end (F = M = 0).…”

Section: Double-sided Structurementioning

confidence: 99%

“…Double-sided NEMS has recently attracted much attention due to its promising electromechanical performance characteristics such as low power consumption, quick response, etc. [15,16]. The double-sided driven configuration is proposed for the actuation of gyroscopes, microphones, comb drives and memory elements [17,18].…”

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confidence: 99%

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Effect of the centrifugal force on the electromechanical instability of U-shaped and double-sided sensors made of cylindrical nanowires

Keivani

Gheisari

Kanani

et al. 2016

J Braz. Soc. Mech. Sci. Eng.

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Beam-type micro/nano-electromechanical systems (MEMS/NEMS) are increasingly used in several branches of engineering and science, i.e. mechanics, chemistry, optics, biology, photonics, electronics, etc. Modeling of the electromechanical stability of NEMS is crucial for the reliable design, fabrication and operation of these devices. Many researchers have investigated the pull-in instability of NEMS devices [1-5]. Although there are many articles focused on modeling the pull-in instability of the conventional NEMS with a simple beam-type electrode [6, 7], few efforts have been made for modeling this phenomenon in less conventional systems such as the U-shaped and double-sided NEMS. In this regard, the present research is devoted to the theoretical study of the electromechanical performance of U-shaped and double-sided cantilever NEMS sensors. The U-shaped configuration consists of two parallel cantilever micro/nano-beams with a rigid plate attached to their free ends. Recently, several studies have investigated the limitations and potential of the U-shaped MEMS/ NEMS as sensors [8], actuators [9], and switches [8-11]. Qian et al. [10] developed a U-shaped nanoelectromechanical switch consisting of a capacitive plate supported by two silicon nanowires. They presented several remarkable advantages of the U-shaped switch such as decreasing the Abstract The U-shaped and double-sided nanostructures are promising for developing miniature angular speed sensors. While the electromechanical instability of conventional beam-type nanostructures has been extensively addressed in the literature, few researchers have investigated this phenomenon in the double-sided and U-shaped sensors. In this regard, the present work demonstrates the effect of the centrifugal force on the pull-in performance of the double-sided and U-shaped sensors fabricated from cylindrical nanowire and operated in the van der Waals (vdW) regime. Based on the modified couple stress theory, the size-dependent constitutive equations of the sensors are derived. The governing equations are solved by two different approaches, i.e. the analytic Duan-Adomian method and the numerical differential quadrature method. The influences of the vdW and centrifugal forces, geometric Communicated by Eduardo Alberto Fancello.

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“…For the case of R ≫ D, Eq. 18reduces to By replacing D with D-w in relations (15), (17) and using Eq. (19), f ext can be defined as…”

Section: U-shaped Structurementioning

confidence: 99%

Section: Double-sided Structurementioning

confidence: 99%

Section: Double-sided Structurementioning

confidence: 99%

mentioning

confidence: 99%

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Effect of the centrifugal force on the electromechanical instability of U-shaped and double-sided sensors made of cylindrical nanowires

Keivani

Gheisari

Kanani

et al. 2016

J Braz. Soc. Mech. Sci. Eng.

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show abstract

“…The double-sided NEMS has recently attracted much attention due to its promising electromechanical performance such as low power consumption, quick response, etc. [1,2]. The double-sided driven scheme has been proposed for the actuation of gyroscopes and memory elements [3,4].…”

Section: Introductionmentioning

confidence: 99%

The size-dependent electromechanical instability of double-sided and paddle-type actuators in centrifugal and Casimir force fields

et al. 2017

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Abstract. The present research is devoted to theoretical study of the pull-in performance of double-sided and paddle-type NEMS actuators fabricated from cylindrical nanowire operating in the Casimir regime and in the presence of the centrifugal force. D'Alembert's principle was used to transform the angular velocity into an equivalent static, centrifugal force. Using the couple stress theory, the constitutive equations of the actuators were derived. The equivalent boundary condition technique was applied to obtain the governing equation of the paddle-type actuator. Three distinct approaches, the DuanAdomian Method (DAM), Finite Di erence Method (FDM), and Lumped Parameter Model (LPM), were applied to solve the equation of motion of these two actuators. This study demonstrates the in uence of various parameters, i.e., the Casimir force, geometric characteristics, and the angular speed, on the pull-in performance.

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A 2-DOF microstructure-dependent model for the coupled torsion/bending instability of rotational nanoscanner

et al. 2016

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Dynamic pull-in instability of double-sided actuated nano-torsional switches

Cited by 43 publications

References 25 publications

Effect of the centrifugal force on the electromechanical instability of U-shaped and double-sided sensors made of cylindrical nanowires

Effect of the centrifugal force on the electromechanical instability of U-shaped and double-sided sensors made of cylindrical nanowires

The size-dependent electromechanical instability of double-sided and paddle-type actuators in centrifugal and Casimir force fields

A 2-DOF microstructure-dependent model for the coupled torsion/bending instability of rotational nanoscanner

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