student profile: Miss Debora Monego


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Thesis work

Thesis title: Ligand-mediated interactions between colloidal nanorods: Establishing design rules for creating new materials for solar energy capture

Supervisors: Girish LAKHWANI , Asaph WIDMER-COOPER

Thesis abstract:

Metal and semiconductor nanoparticles exhibit unique physical, chemical, optical, and electronic properties that enable their use in a wide range of technological applications, such as conductive inks and colour-improving additives for OLEDs. Making nanostructured materials over large length-scales, however, requires the assembly of colloidal particles into well-ordered structures. This is still problematic, since the colloid and surface interactions that govern the assembly of nanoparticles in liquids are not fully understood. Inorganic particles are typically covered with surfactant-like ligands that prevent their aggregation into disordered structures in apolar solvents, but are also believed to play a critical role in particle stability and interaction. We use molecular dynamics simulations to study the interaction of nanoparticles in solution, and how it depends on factors such as the ligand type, the particle size, the core and solvent nature, or the temperature. By answering these questions, we aim to obtain a better control over the assembly of passivated colloidal particles.

Selected publications

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Journals

  • Kister, T., Monego, D., Mulvaney, P., Widmer-Cooper, A., Kraus, T. (2018). Colloidal stability of apolar nanoparticles: The role of particle size and ligand shell structure. ACS Nano, 12(6), 5969-5977. [More Information]

2018

  • Kister, T., Monego, D., Mulvaney, P., Widmer-Cooper, A., Kraus, T. (2018). Colloidal stability of apolar nanoparticles: The role of particle size and ligand shell structure. ACS Nano, 12(6), 5969-5977. [More Information]

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