Here, we present an approach to encode medical history on a patient using the spatial distribution of biocompatible, near-infrared quantum dots (NIR QDs) in the dermis. QDs are invisible to the naked eye yet detectable when exposed to NIR light.
See abstract here: https://stm.sciencemag.org/content/11/523/eaay7162
Source: Science Translational Medicine 18 Dec 2019:
Vol. 11, Issue 523, eaay7162