On the structure of nanoparticle clusters: effects of long-range interactions

R. Kamphorst*, M.F. Theisen, A.D.B. Bordoloi, S. Salameh, G.M.H. Meesters, J.R. van Ommen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The fractal structure of aggregates consisting of primary nanoparticles naturally arises during their synthesis. While typically considered to be a fully stochastic process, we suspect long-range interactions, in particular van der Waals forces, to induce an active pull on particles, altering the clustering process. Using an off-grid 3D model, we show that an active pull decreases the density and fractal dimension of formed clusters. These findings could not be reproduced by 2D models, which underestimate screening effects. Additionally, we determined the range within which van der Waals forces dominate the aggregation process.
Original languageEnglish
Number of pages6
JournalPhysical chemistry chemical physics (PCCP)
DOIs
Publication statusPublished - 2025

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