FIGURE 4.

Examples of 2D material synthesis and optical properties. (A) Synthesis process of NIR-Ⅱ-CD/BP. (B) Absorption spectra of BP NSs, NIR-Ⅱ-CD and NIR-Ⅱ-CD/BP from UV to NIR-Ⅱ regions. (C) Intuitive temperature image of NIR-Ⅱ-CD/BP solution under 1,064 nm (0.6 W cm⁻²) irradiation (reproduced from (Geng et al., 2019) with permission from American Chemical Society). (D) Synthesis process of ultra-thin single layer 1T-MoS₂ and 2H-MoS₂ nanodots. (E) UV-vis-NIR spectra of 1T-MoS₂ and 2H-MoS₂ nanodots. (F) The temperature change of 1T-MoS₂ and 2H-MoS₂ nanodots solution after six times of laser on/off (heating/cooling) (reproduced from (Zhou et al., 2020) with permission from Wiley-VCH Verlag). (G) Preparation process of Nb₂C NSs. (H) UV-vis-NIR absorption spectra of Nb₂C NSs with different concentrations. (I) Temperature change of Nb₂C NSs irradiated with different power density 1,064 nm laser (reproduced from (Lin et al., 2017) with permission from American Chemical Society).