Acoustic Bubble and Magnetic Actuation-Based Microrobot for Enhanced Multiphase Drug Delivery Efficiency

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Drug Delivery Systems

Background:

• Multiphase drug delivery presents challenges in efficiency and targeted administration.
• Current microrobotic systems require further development for complex drug formulations.

Purpose of the Study:

• To develop and validate an acoustic bubble and magnetic actuation-based microrobot for enhanced multiphase drug delivery.
• To investigate the microrobot's capability to encapsulate and deliver various drug types, including liquids.

Main Methods:

• Fabrication of the microrobot using microfabrication and ultra-precision 3D printing.
• Utilizing acoustic bubbles for drug encapsulation and release validation through flow pattern visualization.
• Employing magnetic actuation of liquid metal for targeted drug delivery.
• High-speed camera analysis to measure bubble oscillation properties and their effect on drug release.

Main Results:

• Successful encapsulation of multiphase drugs, including liquids, within the microrobot's bubbles.
• Demonstrated targeted drug delivery to simulated blood vessels (Y-shaped channel).
• Validated drug release principles through visualization of bubble-induced flow patterns.

Conclusions:

• The proposed microrobot effectively transports and releases multiphase drugs, offering a promising approach for targeted drug therapy.
• This technology has potential applications beyond drug delivery, including minimally invasive surgery and cell manipulation.
• The simple structure and dual-actuation mechanism enhance the potential for clinical translation and broad biomedical applications.