A team of researchers in Singapore have come up with a full color printing method capable of producing the world's highest quality photos with a resolution of up to 100,000 dots per inch (DPI). The astounding achievement, as outlined in Nature Nanotechnology, could be used for making microimages for security purposes, stenography, nanoscale optical filters, and high-density spectrally encoded optical data storage.
To put this into perspective, a run-of-the-mill inkjet printer tops out at 10,000 DPI. The level of detail capable at 100,000 DPI is staggering and considered the most advanced photo technique to date.
"The resolution of printed colour images very much depends on the size and spacing between individual ‘nanodots’ of color," explained Dr Karthik Kumar, one of the key researchers involved, according to PetriDishNews.com. "The closer the dots are together and because of their small size, the higher the resolution of the image. With the ability to accurately position these extremely small color dots, we were able to demonstrate the highest theoretical print colour resolution of 100,000 DPI."
Researchers say they were inspired by stained glass made from mixing metal fragments. The nanoparticles from the metal fragments scatter light that passes through to give the stained glass its color palette.