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Related Experiment Video

Updated: Aug 9, 2025

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

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Synthesis of patchy particles using gaseous ligands.

Mudassar Mumtaz Virk1, Konstantin Nikolaus Beitl1, Peter D J van Oostrum1

  • 1Institute of Biologically Inspired Materials, Department of Bionanosciences, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, Stg.1, Stk.2, Vienna 1190, Austria.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|February 22, 2023
PubMed
Summary

We developed a new method to create polar inverse patchy colloids with two oppositely charged patches. These particles offer new possibilities for controlling self-assembly processes through surface chemistry modifications.

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Area of Science:

  • Colloid science
  • Surface chemistry
  • Materials science

Background:

  • Colloidal particle self-assembly is governed by particle composition, medium, and surface chemistry.
  • Inhomogeneous or patchy surface chemistry introduces orientational dependence to particle interactions.
  • This steering guides self-assembly towards desired configurations for fundamental or applied research.

Purpose of the Study:

  • To present a novel method for modifying colloidal particle surface chemistry.
  • To synthesize polar inverse patchy colloids with two oppositely charged polar patches.
  • To investigate the pH-dependent charge characteristics of these synthesized particles.

Main Methods:

  • Modification of colloidal particle surface chemistry using gaseous ligands.
Keywords:
inverse patchy colloidspatchy colloidssynthesis

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  • Synthesis of polar inverse patchy colloids with controlled surface charges.
  • Characterization of particle charge dependence on the pH of the suspending solution.

    • Main Results:

    • Successful synthesis of polar inverse patchy colloids.
    • Demonstration of two oppositely charged patches on particle poles.
    • Characterization of the pH-dependent charge behavior of the synthesized colloids.

    Conclusions:

    • The novel approach enables precise control over colloidal particle surface chemistry.
    • Polar inverse patchy colloids offer new avenues for designing self-assembled structures.
    • Understanding pH-dependent charge is crucial for utilizing these colloids in various applications.