Tungsten disulfide-based nanocomposites for photothermal therapy

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Transition-metal dichalcogenide (TMDC) nanostructures, like tungsten disulfide (WS2), are explored for various applications due to their unique properties.
• WS2 nanotubes and nanoparticles exhibit biocompatibility and low toxicity, suggesting potential in medical and biological fields.
• Photothermal therapy (PTT) offers targeted cancer treatment using light-responsive materials and near-infrared lasers.

Purpose of the Study:

• To develop and evaluate WS2 nanotubes functionalized with ceric ammonium nitrate-maghemite (CAN-mag) nanoparticles for enhanced photothermal therapy (PTT).
• To investigate the magnetic properties and in vitro efficacy of the resulting nanocomposite for cancer treatment.
• To demonstrate the potential for secondary functionalization of the nanocomposite for combined therapies.

Main Methods:

• Synthesis of WS2 nanotubes functionalized with CAN-mag nanoparticles to create a magnetic nanocomposite.
• In vitro evaluation of the nanocomposite's photothermal therapy activity against two types of cancer cells.
• Assessment of nanocomposite aggregation and demonstration of secondary functionalization via polymer grafting.

Main Results:

• The functionalized WS2 nanotubes formed a magnetic nanocomposite with improved PTT activity compared to non-functionalized nanotubes.
• The nanocomposite exhibited reduced aggregation in vitro.
• Successful grafting of two polymers onto the nanocomposite surface demonstrated its capacity for multi-functionalization.

Conclusions:

• WS2 nanotubes functionalized with CAN-mag nanoparticles represent a promising magnetic nanocomposite for enhanced PTT of cancer.
• The developed nanocomposite offers improved therapeutic efficacy, reduced aggregation, and versatile functionalization capabilities for advanced cancer treatment strategies.