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PreprintCC BY 4.0arXiv

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  -