Fig. 8From: Boltzmann- and Non-Boltzmann-Based Thermometers in the First, Second and Third Biological Windows for the SrF2:Yb3+, Ho3+ Nanocrystals Under 980, 940 and 915 nm ExcitationsThe relative sensitivity \({\text{S}}_{\text{R}}\) versus temperature of SrF2:Yb3+/Ho3+ (12/0.1 mol%) NCs under the excitation of a–c 980 nm, d–f 940 nm and g–i 915 nm, respectivelyBack to article page