Nanostructured Metal Particles and Their Optical Applications
Summary
Nanostructured metal particles exploit the collective oscillation of conduction electrons—surface plasmons—to produce highly tunable optical responses. By tailoring size, shape and composition, metallic nanoparticles can be engineered to exhibit resonances across the visible and near-infrared spectrum. Core–shell constructs, alloyed clusters and anisotropic shapes enable precise control of plasmon wavelength, intensity and localisation of near-field enhancement zones known as hotspots. These properties underpin a wide array of applications, including surface-enhanced Raman scattering (SERS) substrates for ultrasensitive chemical detection, photothermal therapy agents for minimally invasive medicine, deep-tissue photoacoustic imaging contrast media and energy-harvesting coatings for solar control. Recent advances in continuous-flow synthesis and programmable self-assembly have improved reproducibility and scale, opening pathways to industrial deployment. Moreover, integration with responsive polymers and mesoporous matrices has led to multifunctional composites capable of light-triggered drug release or dynamic optical switching. The global significance of these developments lies in their contribution to precision diagnostics, environmental monitoring, sustainable energy management and advanced manufacturing of photonic devices.
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Nanostructured Metal Particles and Their Optical Applications publication trend
The graph below shows the total number of articles in nanostructured metal particles and their optical applications across all publications each year (not limited to Nature Index journals).
Technical terms
Localised surface plasmon resonance (LSPR): Collective oscillation of conduction electrons in a metal nanoparticle, resulting in a sharp optical absorption or scattering peak.
Core–shell nanoparticle: A composite particle comprising a central core material enclosed by a distinct metallic shell to tune optical and chemical properties.
Surface-enhanced Raman scattering (SERS): Amplification of Raman signals by plasmonic structures, enabling detection of molecules at extremely low concentrations.
Hotspot: A nanoscale region of intense electromagnetic field enhancement, typically located at junctions or sharp features of plasmonic particles.
Photothermal effect: Conversion of absorbed light into heat by plasmonic nanoparticles, exploited in medical therapy and thermal management.
Plasmonic nanoparticle: A metal nanoparticle designed to support surface plasmon resonances for manipulating light at the nanoscale.
References
- Monodisperse Sub-100 nm Au Nanoshells for Low-Fluence Deep-Tissue Photoacoustic Imaging. Nano Letters (2023).
- Raspberry-Like Plasmonic Nanoaggregates with Programmable Hierarchical Structures for Reproducible SERS Detection of Wastewater Pollutants and Biomarkers. Analytical Chemistry (2024).
- Silver Nanoshells with Optimized Infrared Optical Response: Synthesis for Thin-Shell Formation, and Optical/Thermal Properties after Embedding in Polymeric Films. Nanomaterials (2023).
- Continuous flow synthesis and simulation-supported investigation of tunable plasmonic gold patchy nanoparticles. Nanoscale (2024).
- Hydrogel-Encapsulated Mesoporous Silica-Coated Gold Nanoshells for Smart Drug Delivery. International Journal of Molecular Sciences (2019).
- Temperature-Responsive Hydrogel-Coated Gold Nanoshells. Gels (2018).
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