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Updated: Dec 14, 2025
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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
Published on: July 18, 2014
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Effect of particle surface corrugation on colloidal interactions
Tero Kämäräinen1, Blaise L Tardy1, Sousa Javan Nikkhah2
1Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, Espoo, P.O. Box 16300, FI-00076 Aalto, Finland.
Journal of Colloid and Interface Science
|July 17, 2020
Summary
Realistic corrugated particle shapes significantly alter colloidal interaction energy compared to simple models. Surface roughness and heterogeneities impact energy barriers and nanoparticle accessibility, revealing complex colloidal behavior.
Area of Science:
- Colloid and surface science
- Materials science
- Nanotechnology
Background:
- Colloidal particle morphology, including surface roughness and corrugations, influences interaction energy.
- Previous studies often use simplified models, neglecting realistic morphological heterogeneities.
Purpose of the Study:
- Investigate colloidal interactions of realistic corrugated particles.
- Compare interactions with simplified concave polyhedral models.
- Understand how morphological heterogeneities affect colloidal interactions.
Main Methods:
- Applied surface element integration to electron tomography-based, realistic corrugated particles.
- Differentiated surface features into vertices, ridges, and ridge networks.
- Utilized molecular modeling to assess surface feature accessibility.
Main Results:
- Observed significant mixing of interaction energy across different surface features.
- Found varied energy barrier heights and secondary minimum depths compared to polyhedral models.
- Attributed deviations to altered effective contact distance due to surface roughness and heterogeneities.
- Determined impaired nanoparticle access in crevices between corrugations.
Conclusions:
- Realistic particle morphology critically affects colloidal interaction energy.
- Surface roughness and heterogeneities lead to deviations from simplified models.
- Morphological details dictate nanoparticle accessibility and colloidal behavior.
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