Dresden 2017 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 34: Colloids and Complex Fluids II (joint session BP/CPP/DY, organized by CPP)

DY 34.8: Talk

Wednesday, March 22, 2017, 12:30–12:45, ZEU 260

Clusters in dipolar fluids — •Michela Ronti¹, Alexey O. Ivanov², Lorenzo Rovigatti³, Jose M. Tavares⁴, Francesco Sciortino⁵, and Sofia S. Kantorovich^1,2 — ¹Computational Physics, University of Vienna, Sensengasse 8, 1090 Vienna, Austria — ²Ural Federal University, 3 Ural Federal University, Lenin av. 51, Ekaterinburg, 620000, Russia — ³Rudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford, OX1 4 NP, United Kingdom — ⁴Instituto Superior de Engenharia de Lisboa-ISEL, Rua Conselheiro Emidio Navarro 1, 1950-062 Lisboa, Portugal — ⁵University of Rome La Sapienza, Piazzale Aldo Moro 2, I-00185, Roma, Italy

We describe the self-assembly in magnetic nanocolloids by using a dipolar hard sphere (DHS) model. The phase diagram of this system at low temperature remains debatable regardless the expected simplicity of the model. At low temperature DHS particles self-assemble into complex structures, with primary structures composed by rings and chains. The latter form the building blocks for further aggregation. To elucidate the formation of branched structures analytically, we need to calculate accurately partition functions of various clusters. For that we introduce grand-canonical single cluster Monte Carlo simulations.