Synthesis of colour tunable lanthanide-ion doped NaYF4upconversion nanoparticles by controlling temperatureElectronic supplementary information (ESI) available: Experimental and instrumental details, TEM images, XRD, IR, RGR of NaYF4:20%Yb,2%Er UCNPs prepared at different temperature, and effect of the composition of the reaction solution. See DOI: 10.1039/c002615h

A simple and general method is reported to tune the multicolour output of lanthanide-ion doped NaYF4upconversion nanoparticles within a given composition by controlling the reaction temperature in the thermolysis procedure. [ABSTRACT FROM AUTHOR]