Figure 2.

A) SEM image of TBH gel. B) Absorption spectra of pure agarose hydrogel, BTS, TDCAc and the TBH gel. C) Temperature elevation of TBH gel at different loading concentrations of TDCAc under 660 nm laser irradiation (0.5 W cm⁻²). D) Temperature elevation of TBH gel at 100 µg mL⁻¹ of TDCAc under 660 nm laser irradiation with different power densities. E) Infrared thermal images of PBS solution and TBH gel upon exposure to 660 nm laser irradiation (0.5 W cm⁻²) at different times. F) The decomposition rate of methylene blue in the presence of PBS or TDCAc (10 µg mL⁻¹) with or without laser irradiation (0.1 W cm⁻²). G) Rheological measurements of the viscosity of TBH gel at different temperatures. H) Fluorescence intensities of the DEACA probe after incubation with TBH gel with or without laser irradiation (0.5 W cm⁻²) for different periods of time. The concentration of TDCAc and BTS in the final prepared TBH gel is 100 µg mL⁻¹ and 10 µg mL⁻¹, respectively.