A Strategy to Design Cu₂MoS₄@MXene Composite With High Photothermal Conversion Efficiency Based on Electron Transfer...

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Photothermal therapy (PTT) is a promising cancer treatment, but its efficacy is limited by the poor photothermal conversion efficiency (PCE) of existing agents.
• A major challenge is the radiative recombination of photogenerated electrons, which reduces heat generation.
• Strategies to enhance PTT involve suppressing radiative recombination and promoting nonradiative recombination pathways.

Purpose of the Study:

• To design and synthesize a novel nanocomposite for enhanced photothermal therapy.
• To investigate the mechanism behind the improved photothermal performance.
• To demonstrate the potential of this approach for broader applications in cancer treatment.

Main Methods:

• Fabrication of a Cu₂MoS₄@MXene nanocomposite.
• Characterization of the nanocomposite's structure and properties.
• Evaluation of its photothermal conversion efficiency under laser irradiation.
• Analysis of the underlying mechanism involving electron migration and synergistic effects.

Main Results:

• The Cu₂MoS₄@MXene nanocomposite exhibited significantly enhanced photothermal conversion efficiency (η = 87.98%).
• Electron migration within the nanocomposite was identified as the key factor for improved performance.
• A proposed mechanism highlights the synergistic roles of electron transfer regulation and localized surface plasmon resonance (LSPR) in promoting nonradiative recombination.

Conclusions:

• The Cu₂MoS₄@MXene nanocomposite offers a superior photothermal agent for cancer therapy.
• The design strategy effectively enhances the photothermal performance by controlling electron recombination.
• This approach can be extended to other photothermal agents to improve their efficacy in cancer treatment.