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Geis, Stefan; Müller, Bernhard; Fricke, J.

doi:10.1023/a:1009627307265

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Dielectric Materials1

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Cited by 6 publications

(2 citation statements)

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“…Their complex dielectric constant ε shows losses due to relaxation phenomena, attributable to water adsorbed at the inner surface of the samples, in the range of frequency from 1 Hz to 50 kHz. This is different with silica aerogels which do not show losses …”

Section: Dielectric Materialscontrasting

confidence: 63%

Chemistry of Aerogels and Their Applications

2002

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Section: Dielectric Materialscontrasting

confidence: 63%

Chemistry of Aerogels and Their Applications

2002

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“…Aerogels are the solids with the lowest index of refraction in the visible range n ∼ 1.05 depending on the porosity. The dielectric behavior of aerogels are dominated by the air voids rather than by the solid part [47] and the index of refraction varies linearly with porosity, as has been shown in several measurements in limited frequency ranges [45,46,47]. To calculate the Casimir force we need the dielectric response of the aerogel in a broad frequency range.…”

Section: Resultsmentioning

confidence: 99%

Reduction of the Casimir force using aerogels

Esquivel‐Sirvent

2007

Journal of Applied Physics

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By using silicon oxide based aerogels we show numerically that the Casimir force can be reduced several orders of magnitude, making its effect negligible in nanodevices. This decrease in the Casimir force is also present even when the aerogels are deposited on metallic substrates. To calculate the Casimir force we model the dielectric function of silicon oxide aerogels using an effective medium dielectric function such as the Clausius-Mossotti approximation. The results show that both the porosity of the aerogel and its thickness can be use as control parameters to reduce the magnitude of the Casimir force.

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