High photothermal response rate by synergistic effect of CNT-TA-Ag composite structure

High photothermal response rate of the photothermal conversion of nanomaterials has attracted extremely research interest to realize accurate temperature control in numerical investigation areas. The kilogram CNT-TAAg nanocomposite structure is prepared by a simple and green method. The tannic acid-silver nanoparticles (TAAg NPs) can be effectively attached to CNTs to form a coating structure owing to non-covalent interaction. The photothermal conversion performance of the CNT-TA-Ag nanocomposite structure is systematically evaluated from the following four aspects: stability, temperature control, response rate, and synergistic effect. The CNT-TAAg nanocomposite exhibits excellent stability and high photothermal response rate (about 14 degrees C/s under 0.5 W laser irradiation), which can be ascribed to the synergistic effect of Ag nanoparticles and CNTs by carrier's microtransport process. The forming process and photothermal mechanism of CNT-TA-Ag nanocomposite are analyzed in detail.