Engineers at the University of Maryland (UMD) have created a new multi-material 3-D nanoprinting technique that was featured on the inside front cover of the July 21 issue of Lab on a Chip.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/new-multi-material-3-d-nanoprinting-strategy-could-revolutionize-optics-photonics-and-biomedicine