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Related Experiment Video

Updated: Jun 18, 2026

Fabricating Highly Open Porous Microspheres (HOPMs) via Microfluidic Technology
05:21

Fabricating Highly Open Porous Microspheres (HOPMs) via Microfluidic Technology

Published on: May 16, 2022

Microparticles with bimodal nanoporosity derived by microemulsion templating.

Nick J Carroll1, Svitlana Pylypenko, Plamen B Atanassov

  • 1Department for Chemical and Nuclear Engineering, University of New Mexico, Albuquerque, New Mexico 87131, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|November 26, 2009
PubMed
Summary

Researchers created hierarchically bimodal porous silica microparticles using tailored surfactant mixtures. This method controls nanoscale structuring for applications like electrocatalysts and chromatography.

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Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
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Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

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Last Updated: Jun 18, 2026

Fabricating Highly Open Porous Microspheres (HOPMs) via Microfluidic Technology
05:21

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Published on: May 16, 2022

Particle Templated Emulsification enables Microfluidic-Free Droplet Assays
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Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control
06:16

Fabrication of Spherical and Worm-shaped Micellar Nanocrystals by Combining Electrospray, Self-assembly, and Solvent-based Structure Control

Published on: February 11, 2018

Area of Science:

  • Materials Science
  • Nanotechnology
  • Colloid and Surface Chemistry

Background:

  • Liquid mixtures of oil, water, and surfactants display complex phase behaviors.
  • Surfactant selection and concentration are key to controlling nanoscale structuring.

Purpose of the Study:

  • To demonstrate the templating of silica microparticles with a designed surfactant micelle/microemulsion mixture.
  • To achieve hierarchically bimodal porous structures by controlling the phase state of the mixture.

Main Methods:

  • Utilizing a specially designed surfactant micelle/microemulsion mixture for templating silica microparticles.
  • Tuning the surfactant composition and concentration to control the coexistence of microemulsion droplets and surfactant micelles.
  • Employing a "lost-wax" approach to fabricate carbon and carbon/platinum replicas.

Main Results:

  • Hierarchically bimodal porous silica microparticles were successfully synthesized.
  • The coexistence and dimensions of microemulsion droplets and surfactant micelles dictated the two pore sizes.
  • Carbon and carbon/platinum replicas of the silica microspheres were fabricated.

Conclusions:

  • Tailored surfactant mixtures enable the controlled design of hierarchically bimodal porous structures.
  • The resulting porous materials are suitable for applications in electrocatalysis and chromatography.
  • This templating strategy offers a pathway for creating advanced nanomaterials.