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Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System

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Published on: June 30, 2018

Ratchet-Driven Directed Nanoparticle Transport Along a Dipole Chain.

Taisiya Korochkova^1,2, Barbara Gawdzik³, Przemysław Pączkowski³

¹Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, Kyiv, Ukraine.

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry

|July 15, 2026

Summary

The ratchet effect enables directed nanoparticle motion near periodic structures. Optimal transport occurs at specific distances and temperatures, controllable by adjusting these parameters or environmental conditions.

Keywords:

artificially created nanotransport directed nanoparticle transport potential energy fluctuations ratchet effect

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Published on: October 26, 2016

Area of Science:

Physics
Physical Chemistry
Materials Science

Background:

The ratchet effect describes spontaneous directed nanoparticle flux near periodic structures in viscous media.
This phenomenon requires particle-structure interaction, broken symmetry, and weak fluctuations driving the system out of thermodynamic equilibrium.

Purpose of the Study:

Investigate directed motion of a single nanoparticle near a periodic dipole chain using a small potential energy fluctuation model.
Analyze the induced flux dependence on environmental temperature, fluctuation frequency, and particle distance from the chain.

Main Methods:

Utilized the small potential energy fluctuation model.
Analyzed nanoparticle flux as a function of temperature, fluctuation frequency, and distance from a periodic dipole chain.

Main Results:

Observed two types of flux dependence on distance: monotonic decrease at high temperatures and non-monotonic at lower temperatures.
Identified an optimal nanoparticle position for maximized transport velocity at lower temperatures.
Found that temperature primarily determines the position of flux maxima, while frequency affects amplitude.

Conclusions:

Optimal ratchet operation, characterized by maximum nanoparticle velocities, can be achieved by tuning particle-structure distance or temperature.
Findings offer insights into controlling nanoparticle transport for potential applications in nanotechnology and materials science.