Colloidal particle aggregation in three dimensions

Häbel, Henrike,1987Karolinska Institutet,Chalmers tekniska högskola,Chalmers University of Technology (författare)

Colloidal systems are of importance not only for everyday products, but also for the development of new advanced materials. In many applications, it is crucial to understand and control colloidal interaction. In this paper, we study colloidal particle aggregation of silica nanoparticles, where the data are given in a three-dimensional micrograph obtained by high-angle annular dark field scanning transmission electron microscopy tomography. We investigate whether dynamic models for particle aggregation, namely the diffusion limited cluster aggregation and the reaction limited cluster aggregation models, can be used to construct structures present in the scanning transmission electron microscopy data. We compare the experimentally obtained silica aggregate to the simulated postaggregated structures obtained by the dynamic models. In addition, we fit static Gibbs point process models, which are commonly used models for point patterns with interactions, to the silica data. We were able to simulate structures similar to the silica structures by using Gibbs point process models. By fitting Gibbs models to the simulated cluster aggregation patterns, we saw that a smaller probability of aggregation would be needed to construct structures similar to the observed silica particle structure.

Särkkä, Aila,1962Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)aila (författare)
Rudemo, Mats,1937Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)rudemo (författare)
Hamngren Blomqvist, Charlotte,1984Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)hamngren (författare)
Olsson, Eva,1960Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f10eva (författare)
Nordin, Matias,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)matias (författare)
Srkk, A (författare)
Karolinska InstitutetChalmers tekniska högskola (creator_code:org_t)

Av författaren/redakt...: Häbel, Henrike, ...; Särkkä, Aila, 19 ...; Rudemo, Mats, 19 ...; Hamngren Blomqvi ...; Olsson, Eva, 196 ...; Nordin, Matias, ...; visa fler...; Srkk, A; visa färre...

Om ämnet

Av lärosätet: Göteborgs universitet; Chalmers tekniska högskola; Karolinska Institutet

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