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. 2019 Aug 27;4(11):14655–14662. doi: 10.1021/acsomega.9b02204

Figure 5.

Figure 5

(a) Infrared thermal image of distilled water and Cu9S8 dots in line. (b) Temperature elevation of distilled water and PEI-capped Cu2–xS NCs aqueous dispersion under the irradiation of a 1064 nm laser with 1.33 W/cm2 for 10 min followed by natural cooling. (c) Time constant for heat transfer from the system determined by applying the linear time data from cooling period (after 10 min) vs negative natural logarithm of driving force temperature. (d) Plot of temperature change (ΔT) over 10 min vs the aqueous dispersions of Cu2–xS NCs with different optical densities.