Fig. 1
From: The subacute toxicity and underlying mechanisms of biomimetic mesoporous polydopamine nanoparticles
The characterization of MPDA nanoparticles. (A) TEM images for as-prepared MPDA particles. Scale bar = 200 μm. (B) The diameter of the MPDAs measured using DLS. (C) Synthetic routes of the preparation of MPDA nanoparticles. (D, E) Photothermal conversion and the improving temperature of MPDAs at different concentrations under 808 nm laser irradiation (1.5 W/cm2). (F, G) Photothermal conversion and the improving temperature of MPDAs (1 mg/mL) under 808 nm laser irradiation with different exposure intensity (0.33–1.5 W/cm2). (J) Photothermal stability study of MPDAs during four circles of heating-cooling processes. (l) Linear relationship between Fluorescence signal intensities and concentrations of DOX.