ArticleNature communications2021
Non-equilibrium properties of an active nanoparticle in a harmonic potential.
Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Tunable 3D optohydrodynamic torques from optical phase gradient-driven colloidal assemblies.Science advances · 2026Article
- Dynamics of Pulsed-Laser Interaction with Janus Particles.ACS photonics · 2025Article
- Unlocking Single-Particle Multiparametric Sensing: Decoupling Temperature and Viscosity Readouts through Upconverting Polarized Spectroscopy.Small methods · 2025Article
- Single molecule-driven nanomotors reveal the dynamic-disordered chemomechanical transduction of active enzymes.Science advances · 2025Article
- Non-Hermitian non-equipartition theory for trapped particles.Nature communications · 2024Article
- Evanescent field trapping and propulsion of Janus particles along optical nanofibers.Nature communications · 2023Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Active particles break out of thermodynamic equilibrium thanks to their directed motion, which leads to complex and interesting behaviors in the presence of confining potentials. When dealing with active nanoparticles, however, the overwhelming presence of rotational diffusion hinders directed motion, leading to an increase of their effective temperature, but otherwise masking the effects of self-propulsion. Here, we demonstrate an experimental system where an active nanoparticle immersed in a critical solution and held in an optical harmonic potential features far-from-equilibrium behavior beyond an increase of its effective temperature. When increasing the laser power, we observe a cross-over from a Boltzmann distribution to a non-equilibrium state, where the particle performs fast orbital rotations about the beam axis. These findings are rationalized by solving the Fokker-Planck equation for the particle's position and orientation in terms of a moment expansion. The proposed self-propulsion mechanism results from the particle's non-sphericity and the lower critical point of the solution.
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Registered trials
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