Figure 5.

Laser-induced heating on different concentrations of PD NP solution and composite fiber.

Notes: (A–D) Thermographic images of PD NP solution droplet (300 µL of 50, 100, 500, and 1,000 µg/mL, respectively) after NIR irradiation. (E) Digital image of fabricated nanofiber device (white – neat PDO fiber mat and brown – with PD NPs [3.8 mg/mL]) (F) Thermographic image was captured from respective Movie S1 showing PDO composite nanofiber device (0.005 mg) in 300 µL PBS. Power and wavelength of the NIR light used in this study were the same for all samples, that is, 2 W/cm² and 808 nm, respectively, for 60 seconds irradiation time. All images are screenshots captured from respective movies.

Abbreviations: NIR, near-infrared; PD NPs, polydopamine nanospheres; PDO, polydioxanone.