Study on the Core-Shell Structure of Gas-Assisted Coaxial Electrospinning Fibers: Implications for Semiconductor...

Area of Science:

• Materials Science and Engineering
• Nanotechnology
• Semiconductor Manufacturing

Background:

• Gas-assisted coaxial electrospinning (GACES) is a promising technique for large-scale coaxial nanofiber membrane fabrication.
• Existing research lacks effective methods for regulating core-shell structures in GACES, limiting applications in semiconductors.
• Tailored core-shell architectures are crucial for high-precision dielectric layers, encapsulation materials, and flexible semiconductor substrates.

Purpose of the Study:

• To investigate the influence mechanism of gas-assisted flow fields on coaxial nanofiber core-shell structures.
• To develop methodologies for effective regulation of coaxial fiber morphology using GACES.
• To provide a framework for scalable fabrication of coaxial nanofiber membranes with controllable structures for semiconductor applications.

Main Methods:

• Utilized finite element simulation analysis of the flow field.
• Developed a coaxial jet mechanics model incorporating a gas-driven flow field.
• Experimentally adjusted gas-assisted flow field parameters to control fiber morphology.

Main Results:

• Reduced average fiber diameter by 47.33% (334.12 ± 16.29 nm to 175.98 ± 1.18 nm).
• Decreased shell thickness by 72.98% and increased core-shell ratio by 289% (0.49 to 1.91).
• Improved uniformity of total diameter distribution by 30.64%.

Conclusions:

• Successfully uncovered the mechanism by which gas-assisted flow fields dictate coaxial nanofiber core-shell structures.
• Demonstrated precise control over fiber diameter, shell thickness, and core-shell ratio through parameter adjustment.
• Established a practical framework for scalable GACES fabrication of tunable coaxial nanofiber membranes for semiconductor devices.