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Effect of interfaces on the nearby Brownian motion

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  • Kai Huang

    (Materials Science Program, University of Wisconsin)

  • Izabela Szlufarska

    (Materials Science Program, University of Wisconsin
    University of Wisconsin)

Abstract

Near-boundary Brownian motion is a classic hydrodynamic problem of great importance in a variety of fields, from biophysics to micro-/nanofluidics. However, owing to challenges in experimental measurements of near-boundary dynamics, the effect of interfaces on Brownian motion has remained elusive. Here we report a computational study of this effect using μs-long large-scale molecular dynamics simulations and our newly developed Green–Kubo relation for friction at the liquid–solid interface. Our computer experiment unambiguously reveals that the t−3/2 long-time decay of the velocity autocorrelation function of a Brownian particle in bulk liquid is replaced by a t−5/2 decay near a boundary. We discover a general breakdown of traditional no-slip boundary condition at short time scales and we show that this breakdown has a profound impact on the near-boundary Brownian motion. Our results demonstrate the potential of Brownian-particle-based micro-/nanosonar to probe the local wettability of liquid–solid interfaces.

Suggested Citation

  • Kai Huang & Izabela Szlufarska, 2015. "Effect of interfaces on the nearby Brownian motion," Nature Communications, Nature, vol. 6(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9558
    DOI: 10.1038/ncomms9558
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    Cited by:

    1. Bhattacharjee, Suraka & Satpathi, Urbashi & Sinha, Supurna, 2022. "Long-time Tails in Quantum Brownian Motion of a charged particle in a magnetic field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 608(P1).
    2. Amir Farokh Payam & Bogyoung Kim & Doojin Lee & Nikhil Bhalla, 2022. "Unraveling the liquid gliding on vibrating solid liquid interfaces with dynamic nanoslip enactment," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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