Plasmonic nanotechnology for photothermal applications - an evaluation

Area of Science:

• Nanotechnology
• Materials Science
• Optics

Background:

• Surface plasmon resonance enables plasmonic nanoparticles' optothermal properties.
• These nanoparticles are crucial for applications including optical sensors, steam generation, and photothermal (PT) therapy.
• Conventional nanomaterials for PT conversion rely on bandgap engineering, unlike plasmonic nanomaterials.

Purpose of the Study:

• To review plasmonic photothermal (PPT) research, focusing on nanoparticle properties and applications.
• To explore various nanomaterials for PPT conversion, including metals, bimetals, and nanocomposites.
• To investigate the critical aspects of nanoparticle stability (thermal, chemical, aggregation) for PPT applications.

Main Methods:

• Theoretical discussion of plasmonic properties using quasi-static approximation, Mie theory, and Gans theory.
• Generic simulations of plasmonic material morphologies and evaluation of PT performance.
• Elucidation of nanomaterials like plasmonic metals, bimetals, and metal-metal oxide nanocomposites for PPT conversion.

Main Results:

• Plasmonic nanomaterials provide tunable absorption bandwidth and high photon absorption efficiency.
• A range of materials, including metals, bimetals, and nanocomposites, show potential for PPT conversion.
• Nanoparticle stability is a crucial, often overlooked, factor for successful PPT applications.

Conclusions:

• Plasmonic nanoparticles present a flexible and efficient alternative for photothermal applications.
• Further research into material stability and application-specific requirements is essential.
• This review provides insights into current challenges and future directions in PPT nanomaterials.