Generating Lifetime-Enhanced Microbubbles by Decorating Shells with Silicon Quantum Nano-Dots Using a 3-Series...

Area of Science:

• Materials Science
• Biotechnology
• Microfluidics

Background:

• Microbubble stability is critical for their application efficacy.
• Controlling microbubble size and stability is a persistent challenge.

Purpose of the Study:

• To develop a method for generating stable, monodisperse, quantum dot-loaded protein microbubbles.
• To investigate the influence of microfluidic parameters on microbubble characteristics.
• To create a predictive model for microbubble generation.

Main Methods:

• Utilized a novel microfluidic device with serially connected T-junctions.
• Generated bovine serum albumin (BSA) protein microbubbles loaded with silicon quantum dots (SiQDs).
• Employed fluorescence microscopy for characterization and developed a computational model.

Main Results:

• Successfully generated stable, monodisperse SiQD-loaded BSA microbubbles down to 22.8 ± 1.4 μm.
• Demonstrated that microbubble diameter and stability can be precisely controlled by adjusting T-junction number, flow rate, and concentrations.
• Observed increased microbubble lifetime with higher T-junction numbers and BSA/SiQD concentrations.
• Computational model accurately predicted experimental microbubble diameter and stability.

Conclusions:

• A new route for producing stable, well-characterized protein and quantum dot-loaded microbubbles was established.
• The triple T-junction microfluidic system offers enhanced control over microbubble properties.
• This approach holds potential for advanced applications requiring stable, functionalized microbubbles.