Janus-Nanojet as an efficient asymmetric photothermal source

Area of Science:

• Nanotechnology
• Biomedical Engineering
• Materials Science

Background:

• Janus effects in nanostructures enable contrasting phenomena within a single architecture.
• Thermal Janus effects offer potential for photoinduced hyperthermia cancer therapies.
• Current plasmonic nanoheaters lack precise temperature control and directional heating, affecting healthy and cancerous cells equally.

Purpose of the Study:

• To propose and analyze a Janus-Nanojet heating unit for targeted cancer therapy.
• To investigate the photothermal conversion and directional heating capabilities of toroidal plasmonic nanoparticles.
• To address limitations in temperature stability and energy management in hyperthermia treatments.

Main Methods:

• Utilizing thermoplasmonic numerical calculations.
• Designing Janus-based nanoheaters with toroidal plasmonic nanoparticles.
• Simulating heat generation and directional energy release under unpolarized illumination.

Main Results:

• Demonstrated superior photothermal conversion features, reaching up to [Formula: see text] K.
• Achieved unique directional heating capacity, channeling over 90% of thermal energy to a target.
• Identified enhanced heating control and energy management potential.

Conclusions:

• Janus-based nanoheaters represent a significant advancement in thermoplasmonics.
• These nanoheaters offer a promising solution for targeted hyperthermia cancer therapies.
• Further development of fabrication techniques for these nanomaterials is warranted.