DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2018 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 80: Brownian Motion and Transport

DY 80.1: Talk

Friday, March 16, 2018, 10:00–10:15, BH-N 128

Analyzing Transport Properties of Nanoparticles in Magnetic Ratchets — •Daniel Kappe1,2 and Andreas Hütten11Center for Spinelectronic Materials and Devices, Physics Department, Bielefeld University, Germany — 2Bielefeld Institute for Applied Materials Research, Bielefeld University of Applied Sciences, Germany

Magnetic nanoparticles have a broad range of possible applications, ranging from cancer treatment to drug delivery and diagnostics. When detecting biomolecules, nanoparticles are superior to micrometer sized particles, because their surface can only bind to a couple of molecules instead of a thousands. But directed, controlled transport is tricky, because of their high diffusivity. A magnetic ratchet utilizes this property and an asymmetric potential to drive the particles. We introduce a scheme to evaluate the transport efficiency of magnetic ratchets.

In order to calculate the efficiency of such setups, a Monte Carlo based numerical integration of the Langevin equation was implemented [1]. The algorithm considers viscous forces, Brownian motion and forces arising from magnetic field gradients, but no particle-particle interactions. Particles subject to a time and space dependent force field, governed by the setup in use. The efficiency of a setup is analyzed reviewing the mean displacement of all particles.

We aim to improve understanding of different setups and tune their parameters, like switching frequencies and external fields, to find and extend the range of particles working in a particular setup.

[1] D. Ermak, H. Buckholz, J. comp. Phys., 35, 169-182 (1980)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2018 > Berlin