AlN hollow-nanofilaments by electrospinning

Area of Science:

• Materials Science
• Nanotechnology
• Ceramic Engineering

Background:

• Aluminum nitride (AlN) is a crucial ceramic material with excellent thermal and electrical properties.
• Developing scalable and controlled methods for producing AlN nanostructures is essential for advanced applications.
• Existing methods for AlN nanofilament synthesis often face challenges in scalability and morphology control.

Purpose of the Study:

• To introduce a novel, original method for fabricating aluminum nitride (AlN) nanofilaments (NFs).
• To demonstrate the feasibility of using a preceramic-based electrospinning process for AlN NF synthesis.
• To characterize the morphology, purity, and structural properties of the produced AlN NFs.

Main Methods:

• Electrospinning of a precursor solution containing poly(ethylimino)alane and a spinnable polymer.
• Ceramization of electrospun filaments at 1000 °C in an ammonia atmosphere.
• Crystallization of the ceramic material at 1400 °C under a nitrogen atmosphere.
• Characterization using high-resolution electron microscopy and 3D tomography.

Main Results:

• Successfully fabricated AlN nanofilaments (NFs) with a homogeneous diameter ranging from 150 to 200 nm.
• The produced AlN NFs exhibit regular morphology and high chemical purity.
• Structural analysis confirmed the polycrystalline nature of the AlN nanofilaments.
• The method provides a new route for controlled synthesis of AlN nanostructures.

Conclusions:

• The presented electrospinning-based method is an effective and original approach for producing high-quality AlN nanofilaments.
• The resulting AlN NFs possess desirable characteristics for potential applications in electronics, thermal management, and catalysis.
• This work contributes a scalable and reproducible technique to the field of ceramic nanomaterial fabrication.