Quantum Dots Enable 3-D Printing of Contacts Lens With LEDs

While the research may have only aimed to demonstrate what is possible for 3D printing of electronic devices, researchers at Princeton University have used 3D printing to create an entire contact lens with light-emitting diodes (LEDs) embedded into it.

For the contact lens to actually work, it would require an external energy source, making it impractical as a real-world device. However, the real point for the Princeton team was to show that it’s possible to produce electronic devices into complex shapes using equally complex materials.

“This shows that we can use 3D printing to create complex electronics including semiconductors,” said Michael McAlpine, an assistant professor of mechanical and aerospace engineering, in a press release. “We were able to 3D print an entire device, in this case an LED.”

The LED was made out of the somewhat exotic nanoparticles known as quantum dots. Quantum dots are a nanocrystal that have been fashioned out of semiconductor materials and possess distinct optoelectronic properties, most notably fluorescence, which makes them applicable in this case for the LEDs of the contact lens. … (Read more)

Source: Spectrum.org