UCLA researchers have developed Discrete-MAG, a discrete magnetic actuation / magnetics platform that delivers precise, programmable magnetic field manipulation at small scales. The system aims to control magnetic particles or micro-devices discretely for applications in sensing, actuation, imaging, or biological interfacing.
Magnetic actuation and manipulation at small scales (micro-/nano-scale) are critical in areas like targeted drug delivery, micro-robotics, biosensors, and responsive materials. Traditional magnetic control systems often have coarse control, limited spatial resolution, and require bulky external magnets or field sources. There is a need for discrete, fine-controlled magnetic actuation with flexibility in configuration and integration with biological/engineering systems.
The Discrete-MAG project implements an array of individually addressable magnetic elements (“discrete magnets”) whose fields can be modulated in space and/or time to manipulate magnetic particles or structures in a controlled manner. The system may include software control, actuation electronics, and specialized magnetic materials or micro-fabricated magnet arrays. The programmable nature allows for localized magnetic field gradients, potentially enabling non-contact control of micro‐objects, precise positioning, motion, or force application.
High spatial resolution in magnetic actuation and manipulation
Programmable control over field strength and magnetic gradient
Potential for miniaturization, integration with microsystems
Non-contact control, which is beneficial for biological or sensitive systems
Ability to drive multiple actuation modes or trajectories via discrete field configurations
Flexibility to adapt to different scales (particle size, distance) and possibly different media
Targeted drug delivery using magnetic microparticles or microcapsules
Microrobotics: micro-actuators or micro-swimmers manipulated by magnetic fields
Magnetic sensing or imaging, e.g. MRI contrast enhancement or magnetic particle tracking
Tissue engineering or cell stimulation/actuation using magnetic scaffolds or beads
Lab-on-a-chip devices requiring precise magnetic control for sample handling or sorting
Remote actuation of implantable or wearable devices
The UCLA Discrete-MAG site outlines the project in the Anatomics research group (SEAS)