Summary
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.
Background
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.
Innovation
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.
Advantages
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High spatial resolution in magnetic actuation and manipulation
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Programmable control over field strength and magnetic gradient
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Potential for miniaturization, integration with microsystems
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Non-contact control, which is beneficial for biological or sensitive systems
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Ability to drive multiple actuation modes or trajectories via discrete field configurations
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Flexibility to adapt to different scales (particle size, distance) and possibly different media
Potential Applications
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Targeted drug delivery using magnetic microparticles or microcapsules
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Microrobotics: micro-actuators or micro-swimmers manipulated by magnetic fields
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Magnetic sensing or imaging, e.g. MRI contrast enhancement or magnetic particle tracking
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Tissue engineering or cell stimulation/actuation using magnetic scaffolds or beads
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Lab-on-a-chip devices requiring precise magnetic control for sample handling or sorting
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Remote actuation of implantable or wearable devices
Development To Date