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Solvent-Free Silsesquioxane Self-Welding for 3D Printing Multi-Refractive Index Glass Objects.

Piaoran Ye¹, Zhihan Hong¹, Douglas A Loy^2,3

¹Wyant College of Optical Sciences, The University of Arizona, 1630 E. University Blvd, Tucson, Arizona 85721, USA.

Advanced Optical Materials

|December 9, 2024

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Researchers developed a new polymeric silsesquioxane (PSQ) resin for 3D printing glass. This advanced material offers improved moisture stability and reduced shrinkage, enabling high-resolution printing of intricate glass micro-optics.

Area of Science:

Materials Science
Additive Manufacturing
Nanotechnology

Background:

Previous liquid silica resin (LSR) for 3D printing glass offered high accuracy but suffered from moisture sensitivity.
Polyhedral oligomeric silsesquioxane (POSS)-based materials provide water stability but exhibit significant shrinkage.
A need exists for advanced resins that combine high resolution, environmental stability, and minimal shrinkage for glass 3D printing.

Purpose of the Study:

To develop a novel polymeric silsesquioxane (PSQ) resin for high-resolution 3D printing of glass objects.
To overcome the limitations of existing resins, specifically moisture sensitivity and high shrinkage.
To enable the fabrication of functional glass micro-optics with tunable properties.

Main Methods:

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Utilized the two-photon polymerization (2PP) technique for high-resolution 3D printing.

Synthesized a PSQ resin incorporating zirconium moieties to tune refractive index.

Investigated the self-welding capability of the printed components.

Main Results:

Achieved nanostructures with feature sizes below 80 nm using the PSQ resin.
Demonstrated tunable refractive indices by incorporating zirconium, facilitating micro-optic fabrication.
Observed self-welding between printed components, enabling multi-component micro-optic assembly.

Conclusions:

The developed PSQ resin is a promising material for high-resolution, moisture-stable 3D printing of glass.
The ability to tune refractive indices and self-weld components opens new avenues for fabricating complex glass micro-optics.
This advancement significantly contributes to the field of advanced glass manufacturing for micro- and nano-scale applications.