Colloidal particle aggregation: mechanism of assembly studied via constructal theory modeling

Beilstein J Nanotechnol. 2021 May 6:12:413-423. doi: 10.3762/bjnano.12.33. eCollection 2021.

Abstract

The assembly of colloidal particles into ordered structures is of great importance to a variety of nanoscale applications where the precise control and placement of particles is essential. A fundamental understanding of this assembly mechanism is necessary to not only predict, but also to tune the desired properties of a given system. Here, we use constructal theory to develop a theoretical model to explain this mechanism with respect to van der Waals and double layer interactions. Preliminary results show that the particle aggregation behavior depends on the initial lattice configuration and solvent properties. Ultimately, our model provides the first constructal framework for predicting the self-assembly of particles and could be expanded upon to fit a range of colloidal systems.

Keywords: DLVO theory; colloids; constructal law; interparticle interactions; nanomaterials; self-assembly; tunable systems.

Grants and funding

This work was funded by the Air Force Research Laboratory Munitions Directorate through the National Research Council (NRC) Research Associateship Programs and support through Air Force Office of Scientific Research (AFOSR) Laboratory Task 20RWCOR090.