Flow Conductance of a Single Nanohole

Details Flow Conductance of a Single Nanohole Flow Conductance of a Single Nanohole

2009-04-22

arxiv.org/abs/0904.3531v2

Phys. Rev. Lett.103, 104502 (2009)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevLett.103.104502

The mass flow conductance of single nanoholes with diameter ranging from 75 to 100 nm was measured using mass spectrometry. For all nanoholes, a smooth crossover is observed between single-particle statistical flow (effusion) and the collective viscous flow emanating from the formation of a continuum. This crossover is shown to occur when the gas mean free path matches the size of the nanohole diameter. As a consequence of the pinhole geometry, the breakdown of the Poiseuille approximation is observed in the power-law temperature exponent of the measured conductance.

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