title: Finding a single lanthanide ion through upconversion.
abstract: Beyond detection: Detection of a single lanthanide ion can be optically achieved by implementing a two-step upconversion process in YAG:Pr(3+) nanocrystals (see picture).
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Huang
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Liu
mesh_terms: D002412:Cations / Q000737:chemistry; D005459:Fluorides / Q000737:chemistry; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D008163:Luminescent Measurements; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry
chemical_list: D002412:Cations; D028581:Lanthanoid Series Elements; D015019:Yttrium; D005459:Fluorides