Semiconductor quantum dots are used in a number of applications, including light-emitting devices, displays and sensors, thanks to their properties of tunable fluorescence wavelength, narrow bandwidth and high brightness. Most of those applications require the dots to be very precisely patterned with targeted properties on solid substrates. Unfortunately, typical direct-write printing methods such as inkjet and gravure printing are limited in their resolution and structural complexity, as well as requiring a lot of post-processing time. A group of researchers from the University of Texas at Austin has developed a new method of quantum dot production, and it's similar to 3D printing. It even has a great name - it's called bubble printing. Read more at