The synchronization of superparamagnetic beads driven by a micro-magnetic ratchet.
Repository Usage Stats
We present theoretical, numerical, and experimental analyses on the non-linear dynamic behavior of superparamagnetic beads exposed to a periodic array of micro-magnets and an external rotating field. The agreement between theoretical and experimental results revealed that non-linear magnetic forcing dynamics are responsible for transitions between phase-locked orbits, sub-harmonic orbits, and closed orbits, representing different mobility regimes of colloidal beads. These results suggest that the non-linear behavior can be exploited to construct a novel colloidal separation device that can achieve effectively infinite separation resolution for different types of beads, by exploiting minor differences in their bead's properties. We also identify a unique set of initial conditions, which we denote the "devil's gate" which can be used to expeditiously identify the full range of mobility for a given bead type.
Published Version (Please cite this version)10.1039/c003836a
Publication InfoGao, Lu; Gottron, Norman J; Virgin, Lawrence N; & Yellen, Benjamin B (2010). The synchronization of superparamagnetic beads driven by a micro-magnetic ratchet. Lab Chip, 10(16). pp. 2108-2114. 10.1039/c003836a. Retrieved from https://hdl.handle.net/10161/4126.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
More InfoShow full item record
Professor of Mechanical Engineering and Materials Science
Professor Virgin's research is centered on studying the behavior of nonlinear dynamical systems. This work may be broadly divided into two components. First, investigation of the fundamental nature of nonlinear systems based on a mathematical description of their underlying equations of motion. Both analytical and numerical techniques are used with special attention focused on the loss of stability of dynamical systems. The second area of interest is to apply recent results from nonlin
Associate Professor in the Department of Mechanical Engineering and Materials Science
Yellen's group is interested in developing highly parallel mechanisms for controlling the transport and assembly of ensembles of objects ranging from micron-sized colloidal particles to single cells. As of 2013, Professor Yellen is active in two main areas of research:1) Development of single cell analysis tools using magnetic circuits. The goal of this project is to develop an automated single cell analysis platform that allows for highly flexible and highly paralle
Alphabetical list of authors with Scholars@Duke profiles.