Rotating magnetic particles for lab-on-chip applications - a comprehensive review.

Area of Science:

• Microfluidics and Nanotechnology
• Biomedical Engineering
• Materials Science

Background:

• Magnetic particles (MPs) are crucial for lab-on-chip (LOC) and biosensing due to their high surface-to-volume ratio, magnetic actuation, and biofunctionalization capabilities.
• Traditional magnetic actuation relies on field gradients for particle separation, while rotational actuation using rotating magnetic fields offers precise control over torque, orientation, and angular velocity.

Purpose of the Study:

• To provide a comprehensive review of the historical development of magnetic particle rotation studies.
• To detail configurations for field generation, physical models, and biological applications of rotating magnetic particles.
• To outline future scientific and technological advancements in rotating magnetic particles for LOC applications.

Main Methods:

• Review of existing literature on magnetic particle rotation.
• Analysis of different magnetic field generation configurations for rotational actuation.
• Examination of physical models describing particle behavior under rotating magnetic fields.

Main Results:

• Demonstrated applications of rotating MPs include fluid mixing, concentration determination of biological molecules, and single-molecule biophysical characterization.
• Rotational actuation enables precise control of particle dynamics in microfluidic environments.
• Historical progression from basic principles to sophisticated applications is traced.

Conclusions:

• Rotating magnetic particles are a versatile tool for advanced lab-on-chip applications.
• Continued research promises significant future developments in their design and application scope.
• This review serves as a foundational resource for researchers in the field.