Figure 3 | Scientific Reports

Figure 3

From: Enrichment of ODMR-active nitrogen-vacancy centres in five-nanometre-sized detonation-synthesized nanodiamonds: Nanoprobes for temperature, angle and position

Figure 3

Typical temperature dependence of DND-OH. (a) Temperature-dependent change in ODMR spectra recorded at 25 and 45 °C with acquisition times of 10 min. The raw data obtained, best-fit curve, and zero-field splitting frequency D are represented by dots, solid line and broken line, respectively. The best-fit model was based on equation (1). D25 °C and D45 °C are the D values estimated from the best-fit curves at 25 and 45 °C, respectively. Inset shows the measured fluorescent bright spot of DND-OH (scale bar 500 nm). (b) Temperature dependence of D, ΔD. Spectra were recorded at 25, 30, 35, 40 and 45 °C by using the same bright spot as in (a). Red dots represent estimated D values. Error bars were calculated on the basis of fitting errors between the model curves and the observed data. Broken gray line represents the linear approximation with a slope of ΔD.

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