Colloidal Stability of Apolar Nanoparticles: The Role of Particle Size and Ligand Shell Structure
Thomas Kister, Debora Monego, Paul Mulvaney, Asaph Widmer-Cooper, Tobias Kraus
ACS NANO | AMER CHEMICAL SOC | Published : 2018
Being able to predict and tune the colloidal stability of nanoparticles is essential for a wide range of applications, yet our ability to do so is currently poor due to a lack of understanding of how they interact with one another. Here, we show that the agglomeration of apolar particles is dominated by either the core or the ligand shell depending on the particle size and materials. We do this by using small-angle X-ray scattering and molecular dynamics simulations to characterize the interaction between hexadecanethiol passivated gold nanoparticles in decane solvent. For smaller particles, the agglomeration temperature and interparticle spacing are determined by ordering of the ligand shel..View full abstract
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Awarded by Australian Research Council
Awarded by ARC Centre of Excellence in Exciton Science
A.W. thanks the Australian Research Council for a Future Fellowship (FT140101061). P.M., D.M. and A.W. were supported by the ARC Centre of Excellence in Exciton Science (CE170100026). Computational resources were generously provided by the University of Sydney HPC service, the National Computational Infrastructure National Facility (NCI-NE) Flagship program, and the Pawsey Supercomputer Centre Energy and Resources Merit Allocation Scheme. T.K. and T.K. thank the DFG Deutsche Forschungsgemeinschaft for funding and E. Arzt for his continuing support of this project. P.M. and T.K. also thank the DAAD for travel support.