光热治疗
材料科学
激子
光电子学
纳米颗粒
半导体
猝灭(荧光)
吸收(声学)
量子点
表面电荷
发色团
纳米技术
光学
光化学
化学
荧光
物理
物理化学
复合材料
量子力学
作者
Zehan Liu,Juan Wen,Guanqing Zhou,Jinqiu Xu,Lei Zhu,Ming Zhang,Feng Liu,Yongming Zhang
标识
DOI:10.1002/adtp.202200168
摘要
Abstract An organic semiconductor nanoparticle (OSN) with surface charge strategy is proposed, which displays excellent photothermal conversion performance. The donor–acceptor hybrid organic semiconductor Y6 is selected as a photothermal chromophore into nanoparticle by self‐assembly, which affords long wavelength absorption, sub‐bandgap emission, and high photon‐to‐thermal conversion. Y6 in OSN adopts closed packing comparing to that in single crystal. The surface charge in OSN causes super‐quenching of the photon excitons, which enhances the nonradiative transition to improve photothermal effect. Lower energy level electronic states are created, which breaks up the bandgap limit and leads to long wavelength emission over 1100 nm. Photothermal therapy and photoacoustic imaging are applied successfully, indicating the success of the new methodology in designing photothermal conversion materials.
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