Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies
نویسندگان
چکیده
This work presents a comprehensive review on gas sensors based localized surface plasmon resonance (LSPR) phenomenon, including the theory of LSPR, synthesis nanoparticle-embedded oxide thin films, and strategies to enhance sensitivity these optical sensors, supported by simulations electromagnetic properties. The LSPR phenomenon is known be responsible for unique colour effects observed in ancient Roman Lycurgus Cup at windows medieval cathedrals. In both cases, result from interaction visible light (scattering absorption) with conduction band electrons noble metal nanoparticles (gold, silver, gold–silver alloys). These are dispersed dielectric matrix relatively high refractive index order push spectral range. At same time, they have located make sensitive changes local environment, property that very attractive sensing applications. Hence, an overview presented, electronic-nose systems, followed description plasmons arise films nanoparticles. Afterwards, oxides explored as robust materials host nanoparticles, preparation methods nanocomposite plasmonic sustainable techniques. Finally, several properties simulation described, gold different shapes, volumes, surroundings calculated using discrete dipole approximation method.
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2021
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app11125388