Recent Advances in Multi-Photon 3D Laser Printing: Active Materials and Applications

Area of Science:

• Materials Science
• Engineering
• Optics

Background:

• Multi-photon 3D laser printing, also known as direct laser writing, has seen significant progress since 1997.
• The commercialization of photocurable inks has accelerated its development.
• A key trend is the shift towards active printable materials for enhanced control, termed 4D microprinting.

Purpose of the Study:

• To review recent advancements in 4D microprinting using active materials.
• To highlight applications in microrobotics, optics and photonics, microfluidics, and life sciences.
• To discuss challenges and future prospects in these fields.

Main Methods:

• Review of recent literature on 4D microprinting and active materials.
• Focus on applications in four key areas: microrobotics, optics/photonics, microfluidics, and life sciences.
• Analysis of active material types including liquid crystalline elastomers, hydrogels, and shape memory polymers.

Main Results:

• Active materials are crucial for advanced 4D microprinting capabilities.
• Significant progress has been made in applying these techniques across diverse scientific and engineering domains.
• The review identifies key active materials driving innovation.

Conclusions:

• 4D microprinting with active materials offers unprecedented control in printed systems.
• Future prospects are bright across microrobotics, optics, microfluidics, and life sciences.
• Ongoing challenges need to be addressed for further development.