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Updated: Jun 18, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
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Device-scale perpendicular alignment of colloidal nanorods.

Jessy L Baker1, Asaph Widmer-Cooper, Michael F Toney

  • 1Department of Mechanical Engineering, University of California-Berkeley, Berkeley, CA 94720, USA.

Nano Letters
|December 8, 2009
PubMed
Summary

Researchers achieved precise vertical alignment of rod-shaped nanocrystals using drying-mediated self-assembly. This breakthrough enables new nanocrystal materials with properties tunable by orientational control, paving the way for advanced devices.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Crystallography

Background:

  • Self-assembly of nanocrystals is key for novel materials.
  • Assembly of spherical nanoparticles is well-established.
  • Rod-shaped nanocrystal assembly is challenging due to orientational order requirements.

Purpose of the Study:

  • To systematically quantify parameters influencing nanocrystal self-assembly.
  • To achieve controlled orientational order in rod-shaped nanocrystals.
  • To explore applications in nanocrystal-based devices.

Main Methods:

  • Systematic quantification of self-assembly parameters.
  • Combination of diffraction and theoretical modeling.
  • Drying-mediated self-assembly technique.

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Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
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Last Updated: Jun 18, 2026

Construction and Operation of a Light-driven Gold Nanorod Rotary Motor System
09:48

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

Published on: June 30, 2018

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

Published on: July 18, 2014

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Published on: August 10, 2017

Main Results:

  • Highlighted the critical role of kinetics in achieving orientational order.
  • Demonstrated unprecedented control over vertical orientation (up to 96%).
  • Achieved controlled assembly on diverse substrates (ITO, PEDOT:PSS, Si3N4).

Conclusions:

  • Drying-mediated self-assembly offers precise control over nanocrystal orientation.
  • Enables macroscopic crystallographic orientational control, addressing granularity issues.
  • Opens new possibilities for nanocrystal devices rivaling thin-film technologies.