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<p>To combat rising bacterial infections, a hollow CuS@CuInS<sub>2</sub> heterostructure is engineered via ion-exchange and self-assembly. This hollow design provides dual photothermal/catalytic functions under visible/808 nm near-infrared irradiation, achieving high photothermal efficiency and stability. Integrating CuInS<sub>2</sub> quantum dots improves charge separation and extends carrier lifetimes compared to CuS alone. The architecture offers multiple reactive sites, enhancing photothermal Cu<sup>2+</sup> release and light-triggered ROS production. Combined heat, Cu<sup>2+</sup>, and ROS disrupt bacterial membranes, cause nucleic acid leakage, and eliminate &gt;90% of <i>S. aureus</i> in 15 min (2.5 mg mL<sup>−1</sup>). The material shows favorable biocompatibility and negligible hemolysis. By synergizing multiple bactericidal pathways, this solar-responsive agent offers an effective solution for bacterial infections.</p>

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Dual-function hollow CuS@CuInS2 heterostructures for rapid and potent bacterial inactivation via photothermal and catalytic mechanisms

  • 期刊论文

  • 发表日期：

    2026年4月7日

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  • Mengchen Xu,
  • Bei Li,
  • Liping Yao,
  • Xiangxiang Zhang,
  • Jiaxin Kong,
  • Yanlin Li,
  • Zhaoke Zheng,
  • Xiaoyan Li

摘要

To combat rising bacterial infections, a hollow CuS@CuInS2 heterostructure is engineered via ion-exchange and self-assembly. This hollow design provides dual photothermal/catalytic functions under visible/808 nm near-infrared irradiation, achieving high photothermal efficiency and stability. Integrating CuInS2 quantum dots improves charge separation and extends carrier lifetimes compared to CuS alone. The architecture offers multiple reactive sites, enhancing photothermal Cu2+ release and light-triggered ROS production. Combined heat, Cu2+, and ROS disrupt bacterial membranes, cause nucleic acid leakage, and eliminate >90% of S. aureus in 15 min (2.5 mg mL−1). The material shows favorable biocompatibility and negligible hemolysis. By synergizing multiple bactericidal pathways, this solar-responsive agent offers an effective solution for bacterial infections.