Local sensing of gas microflows using a levitated nanoparticle
Abstract
Local measurements of gas flow in microscale geometries remain challenging due to the difficulty of micromechanical sensors implantation. Here, we use a levitated nanoparticle as a minimally invasive probe to map, with high spatial resolution, both the local pressure and velocity gas flow for a canonical example - a micropipe subjected to a pressure gradient. This technique enables characterization of nonequilibrium gas transport across several flow regimes, from slip flow to free-molecular flow. We directly observe the emergence of a nonlinear pressure distribution at large pressure ratios and obtain agreement with kinetic-theory predictions and Direct Simulation Monte Carlo calculations. These results introduce levitated nanoparticles as powerful and reconfigurable probes for microchannel gas sensing, with applications in microtechnology, micro-chemistry, and bioengineering.
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BibTeX
@misc{debiossac2026local,
title = {{Local sensing of gas microflows using a levitated nanoparticle}},
author = {Maxime Debiossac and David Grass and Daniel R. Ladiges and John E. Sader and Markus Aspelmeyer and Nikolai Kiesel},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.15462},
eprint = {2610.15462},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.15462},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Local sensing of gas microflows using a levitated nanoparticle
AU - Maxime Debiossac
AU - David Grass
AU - Daniel R. Ladiges
AU - John E. Sader
AU - Markus Aspelmeyer
AU - Nikolai Kiesel
PY - 2026
DA - 2026/10/11
PB - arXiv
DO - 10.48550/arxiv.2610.15462
UR - https://arxiv.org/abs/2610.15462
AB - Local measurements of gas flow in microscale geometries remain challenging due to the difficulty of micromechanical sensors implantation. Here, we use a levitated nanoparticle as a minimally invasive probe to map, with high spatial resolution, both the local pressure and velocity gas flow for a canonical example - a micropipe subjected to a pressure gradient. This technique enables characterization of nonequilibrium gas transport across several flow regimes, from slip flow to free-molecular flow. We directly observe the emergence of a nonlinear pressure distribution at large pressure ratios and obtain agreement with kinetic-theory predictions and Direct Simulation Monte Carlo calculations. These results introduce levitated nanoparticles as powerful and reconfigurable probes for microchannel gas sensing, with applications in microtechnology, micro-chemistry, and bioengineering.
ER -