Single Nanocrystals Studies of Upconverting Nanoparticles Krajnik, Bartosz ; Holodnik, Katarzyna ; Noculak, Agnieszka ; Golacki, Lukasz ; Kostiv, Uliana ; Horak, Daniel ; Podhorodecki, Artur Abstract Publication: ECS Transactions Pub Date: April 2020 DOI: 10.1149/09702.0029ecst Bibcode: 2020ECSTr..97b..29K