MagDNA: A platform to translate collective magnetic interactions to nanomechanics

• Applicants: Dr. Aidin Lak; Joseph Tavacoli Khalkhali, Ph.D.
• Subject Area: Statistical Physics, Nonlinear Dynamics, Complex Systems, Soft and Fluid Matter, Biological Physics ; Biophysics ; Synthesis and Properties of Functional Materials
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 545038923

The interaction among collections of magnetic nanoparticles can give rise to an emergent and enhanced magnetism. In nature, microorganisms exploit this phenomenon through biomineralization of magnetic nanoparticles, allowing precise control over the shape, size, and alignment of nanoparticles within chains. This results in an amplified magnetic moment that enables magnetotaxis. However, in the realm of human-made materials, the lack of precise organizational control over magnetic particles at the nanoscale has hindered attempts to replicate, understand, and apply this phenomenon effectively. To address this challenge, this study aims to advance comprehension of collective magnetic interactions by harnessing the remarkable nanoscale addressability offered by DNA Origami. By strategically positioning tailor-made magnetic nanocubes at a resolution of a single nanometer, a diverse array of particle patterns will be constructed. Through careful characterization of the emergent magnetism exhibited by these patterns, combined with the aid of simulations, a profound understanding of the underlying physics governing collective magnetic interactions will be attained. Building upon this newfound understanding, we will develop functional nanomechanical devices with programmable magnetic torques, specifically nanoscale rotors and swimmers. These devices will provide physical insight into motion at the nanoscale and a foundation for applications within nanorobotics and magnetic force and torques tweezing.

• DFG Programme: Research Grants
• Co-Investigator: Professor Dr. Tim Liedl