Reduction of the Casimir force using aerogels

Esquivel‐Sirvent, R.

doi:10.1063/1.2767225

Cited by 19 publications

(14 citation statements)

References 48 publications

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“…However, an important relation between the three diagonal components of the pressure tensor and the internal energy of the quantum gas systems confined in a rectangular box, P x + P y + P z = 2U/V , can be directly proven from Eqs. (4) and (5). It can be seen from Eq.…”

Section: Thermodynamic Properties Of Confined Quantum Gasesmentioning

confidence: 92%

Thermosize Effects in Confined Quantum Gas Systems

Lin

et al. 2010

Mod. Phys. Lett. B

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Based on the grand potentials of ideal quantum gases, the number of particles, internal energy, three diagonal components of the pressure tensor, and other thermodynamic quantities of the ideal quantum gas systems confined in a rectangular box are analytically derived. It is found that the internal energy of the systems is non-extensive and that the other thermodynamic quantities, which are extensive under the thermodynamic limit condition, are also non-extensive. It is also found that the pressure tensor of the quantum gas systems in a confined space is, in general, no longer isotropic because of the geometric effect of the boundary. Moreover, the influence of the size effect of the containers on the properties of the systems and the thermosize effects in the confined quantum gas systems such as the Seebeck-like, Peltier-like and Thomson-like thermosize effects are discussed with the help of the assumption of local equilibrium. It is very significant to note that the new concept of the "mix" heat capacity, which is neither the heat capacity at constant pressure nor the heat capacity at constant volume, must be introduced in the investigation of Thomson-like thermosize effect. The results obtained may be directly used to analyze the thermodynamic properties and thermosize effects of the confined classical gas.

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Section: Thermodynamic Properties Of Confined Quantum Gasesmentioning

confidence: 92%

Thermosize Effects in Confined Quantum Gas Systems

Lin

et al. 2010

Mod. Phys. Lett. B

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“…This approach was used for studying the reduction in the Casimir force for porous dielectrics. 38 This approximation has been used for explaining the optical properties of VO 2 near the metal-insulator transition. 39 In this model, the effective value of = eff ͑͒ is determined by the concentration f͑0 Յ f Յ 1͒ of the metal phase following the equation,…”

Section: Composite Media and The Intermediate Region For Metal-imentioning

confidence: 99%

Drastic change of the Casimir force at the metal-insulator transition

et al. 2009

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The dependence of the Casimir force on material properties is important for both future applications and to gain further insight on its fundamental aspects. Here we apply the general Lifshitz theory of the Casimir force to low-conducting compounds, or poor metals. For distances in the micrometer range, the Casimir force for a large variety of such materials is described by universal equations containing a few parameters: the effective plasma frequency p , dissipation rate ␥ of the free carriers, and electric permittivity ϱ for Ն p ͑in the infrared range͒. This theory of the Casimir force for poor metals can also describe inhomogeneous composite materials containing small regions with different conductivity. The Casimir force for systems involving samples made with compounds that have a metal-insulator transition shows a drastic change of the Casimir force within the transition region, where the metallic and dielectric phases coexist. Indeed, the Casimir force can increase by a factor of 2 near this transition.

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“…We can compare the vdW and Casimir effects with capillary effects. The vdW torque and Casimir torque expressed by normalized tilting angle can be derived as [11], respectively,…”

Section: Static Instability Caused By Capillary Torquementioning

confidence: 99%

“…And they always exist between two objects close to each other. The influence of vdW and Casimir forces on the stability of the MEMS and NEMS actuators with suspended structures has been extensively reported in many literatures [6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Chan et al [10] showed that Casimir force can be used to actuate the NEMS devices under certain condition.…”

Section: Introductionmentioning

confidence: 99%

Instability analysis of torsional MEMS/NEMS actuators under capillary force

Guo

Zhou

Zhao

2009

Journal of Colloid and Interface Science

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The static and dynamic instabilities of a torsional MEMS/NEMS actuator caused by capillary effects are studied, respectively. An instability number, η, is defined, and the critical gap distance, g cr , between the mainplate and the substrate is derived. According to the values of η and g, the instability criteria of the actuator are presented. The dimensionless motion equation of the MEMS/NEMS torsional actuator is derived when it makes nonlinear oscillation under capillary force. The qualitative analysis of the nonlinear equation is made, and the phase portraits are presented on the phase plane. In addition, the bifurcation phenomena in the system are also analyzed.

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Reduction of the Casimir force using aerogels

Cited by 19 publications

References 48 publications

Thermosize Effects in Confined Quantum Gas Systems

Thermosize Effects in Confined Quantum Gas Systems

Drastic change of the Casimir force at the metal-insulator transition

Instability analysis of torsional MEMS/NEMS actuators under capillary force

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