Cooperative Switching in Large‐Area Assemblies of Magnetic Janus Particles
Abstract
Magnetic Janus particles (MJPs) have received considerable attention for their rich assembly behavior and their potential technological role in applications ranging from simple magnetophoretic displays to smart cloaking devices. However, further progress is hampered by the lack of predictive understanding of the cooperative self‐assembly behavior of MJPs and appropriate dynamic control mechanisms. In this paper, a detailed experimental and theoretical investigation into the magnetically directed spatiotemporal self‐assembly and switching of MJPs is presented. For this purpose, a novel type of MJPs with defined hemispherical compartments carrying superparamagnetic iron oxide nanoparticles as well as a novel simulation model to describe their cooperative switching behavior is established. Combination of the theoretical and experimental work culminates in a simple method to direct assemblies of MJPs, even at high particle concentrations. In addition, a magnetophoretic display with switchable MJPs is developed on the basis of the theoretical findings to demonstrate the potential usefulness of controlled large‐area assemblies of magnetic Janus particles.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 04, 2020
- Source ID
- 10.1002/adfm.201907865
Entities
People
- Jaewon Yoon
- Joerg Lahann
- Kyung Jin Lee
- Marvin Klaiber
- Sangyeul Hwang
- Sharon Glotzer
- Srijanani Bhaskar
- Trung Dac Nguyen
Organizations
- Army Research Office
- Karlsruhe Institute of Technology
- University of Michigan
- Vietnam Education Foundation