Nano letters, 2010-05, Vol.10 (5), p.1907-1911
2010
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Details
- Autor(en) / Beteiligte
- Titel
- Phase Behavior and Structure of a New Colloidal Model System of Bowl-Shaped Particles
- Ist Teil von
- Nano letters, 2010-05, Vol.10 (5), p.1907-1911
- Ort / Verlag
- Washington, DC: American Chemical Society
- Erscheinungsjahr
- 2010
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- We study the phase behavior of bowl-shaped (nano)particles using confocal microscopy and computer simulations. Experimentally, we find the formation of a wormlike fluid phase in which the bowl-shaped particles have a strong tendency to stack on top of each other. However, using free energy calculations in computer simulations, we show that the wormlike phase is out-of-equilibrium and that the columnar phase is thermodynamically stable for sufficiently deep bowls and high densities. In addition, we employ a novel technique based on simulated annealing to predict the crystal structures for shallow bowls. We find four exotic new crystal structures and we determine their region of stability using free energy calculations. We discuss the implications of our results for the development of materials consisting of molecular mesogens or nanoparticles.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1530-6984eISSN: 1530-6992DOI: 10.1021/nl100783gTitel-ID: cdi_proquest_miscellaneous_733516874
- Format
- –
- Schlagworte
- Colloids - chemistry, Computer Simulation, Condensed matter: structure, mechanical and thermal properties, Cross-disciplinary physics: materials science, rheology, Crystallization - methods, Exact sciences and technology, Macromolecular Substances - chemistry, Materials science, Materials Testing, Models, Chemical, Models, Molecular, Molecular Conformation, Nanocrystalline materials, Nanoscale materials and structures: fabrication and characterization, Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals, Nanostructures - chemistry, Nanostructures - ultrastructure, Nanotechnology - methods, Particle Size, Physics, Structure of solids and liquids, crystallography, Surface Properties