Extended Data Fig. 9: Mechano-optical response and resolution as a function of integration time for single (15% Tm3+) piezochromic ANPs.
From: Infrared nanosensors of piconewton to micronewton forces
a. Mechano-optical response (percent change of the 800 nm / 700 nm -emission ratio versus applied force), for up to 9 compression cycles per particle, for 8 different piezochromic ANPs. b-d. Mechano-optical response (b), normalized initial (F = 0) brightness (c), and initial (F = 0) 800 nm / 700 nm -emission ratio (d) versus integration time. Data are derived from 21 compression cycles on 8 piezochromic ANPs. Data points in c are normalized to a 3 s integration time baseline (see Extended Data Fig. 6). Data in b, c, and d are colour-coded as in a (each colour represents a different single particle). e. Resolution of (15% Tm3+) piezochromic ANPs as a function of integration time. Resolutions are derived from 7 compression cycles on two 15% Tm3+ piezochromic ANPs with different initial (F = 0) brightnesses. a-e. Excitation intensity: 1,131 ± 46 kW cm−2. Each compression cycle consists of 10–1000 emission versus force data points. Error bars depict the extrapolated errors derived from the 800 nm / 700 nm -emission ratio versus applied force fit values’ 95% confidence intervals, while compression cycles consisting of a lower number of emission-versus-force data points yield larger S.E.M.s.
