3D Two-Photon Microprinting of Nanoporous Architectures

Area of Science:

• Materials Science
• Nanotechnology
• Additive Manufacturing

Background:

• Advanced fabrication techniques are crucial for creating materials with tailored nanoscale properties.
• Developing methods for generating 3D nanoporous structures with controlled pore sizes remains a significant challenge.

Purpose of the Study:

• To present a photoresist system for 3D two-photon microprinting capable of fabricating inherently nanoporous structures.
• To demonstrate control over pore size and porosity through self-organization and printing parameters.
• To explore the application of these 3D-printed nanoporous materials.

Main Methods:

• Utilizing a photoresist system with polymerizable and inert components for phase separation.
• Employing 3D two-photon microprinting to create co-continuous polymer structures.
• Characterizing nanoporous structures using scanning electron microscopy (SEM) on ultramicrotome sections.
• Analyzing light-scattering properties of the printed materials.

Main Results:

• Successfully fabricated inherently nanoporous polymer structures with mean pore sizes around 50 nm.
• Demonstrated that phase separation during printing leads to 3D co-continuous structures.
• Showcased the ability to control porosity by adjusting printing parameters.
• Validated the functionality of a 3D-printed miniaturized Ulbricht light-collection sphere.

Conclusions:

• The presented photoresist system effectively enables the 3D printing of nanoporous structures via nanoscale self-organization.
• The developed method allows for precise control over porosity, opening avenues for tailored material design.
• The successful application in a light-collection sphere highlights the potential of these materials in optical devices.