Researchers have crafted the globe’s tiniest wine glass, fine-tuned to a size narrower than a strand of human hair. This feat of nano-engineering was achieved using a new cutting-edge 3D-printing technique that allows for the creation of nanoscale glass components essential for the development of electronic and optical devices.
The KTH Royal Institute of Technology team produced this fascinating piece, barely visible without a scanning electron microscope, standing at a colossal few dozen micrometers tall. But in an extraordinary spectacle of miniaturization, they did not stop there. The team also churned out a variety of other minuscule creations, such as spirals, needles, a cantilever, an optical resonator, and an incredible display of the university logo, all carved out of authentic glass.
Previous 3D printing endeavors have seen equally innovative creations like boats and intricately detailed nano-sculptures with dimensions that could perch on human hair. However, this latest achievement stands apart due to the utilization of silica glass, highlighting an unprecedented advancement in 3D printing technology for microscale glass structures.
The technique begins with a tiny pool of hydrogen silsesquioxane (HSQ), a precursor containing the necessary elements to form silica glass. This substance is brought to life by ultrafast laser pulses, in turn crosslinking HSQ into silica glass. The method was capable of generating 3D pixels, or ‘voxels,’ as small as 65 x 260 nanometers, culminating in the final awe-inspiring piece.
This process, according to the team, vastly outperforms traditional 3D-printing methods for glass, which usually necessitate prolonged high temperatures. Impressively, despite their delicate composition, these nano fine art pieces can still withstand high heat during use.
Yet, this isn’t merely a birth of a new art style. The researchers believe the innovative technique holds the potential to truly revolutionize the future of optical systems through significantly smaller and more accurate glass components. Indeed, such components could be directly 3D printed onto a fiber optic cable tip.
“In those systems, all kinds of filters and couplers are needed that can now be 3D printed by our technique. This opens many new possibilities,” said Kristinn Gylfason, co-author of the study, emphasizing the importance of glass in the optical fibers that form the core of the internet.
The findings of the study were published in the notable scientific journal Nature Communications.
