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Localized Surface Plasmon Resonance in Au Nanoparticles Embedded dc Sputtered ZnO Thin Films
Journal of Nanoscience and Nanotechnology
|September 11, 2015
Summary
The optical properties of gold nanoparticles (AuNPs) embedded in zinc oxide (ZnO) films are tunable by controlling nanoparticle morphology. These ZnO/AuNPs structures show potential for UV and infrared reflective window coatings.
Area of Science:
- Materials Science
- Nanotechnology
- Optics
Background:
- Plasmonic behavior of metallic nanoparticles depends on shape, size, and surrounding dielectric medium.
- Zinc oxide (ZnO) and gold nanoparticles (AuNPs) are key components in optical materials.
Purpose of the Study:
- Investigate the influence of ZnO matrix, AuNP morphology, and organization on optical behavior.
- Analyze ZnO/AuNPs-ZnO/ZnO/Glass Plate (GP) structures.
- Evaluate potential applications as window coatings.
Main Methods:
- Fabrication using multi-step physical processes: dc sputtering, thermal evaporation, and annealing.
- Characterization via scanning electron microscopy, glancing angle X-ray diffraction, Rutherford backscattering spectrometry, and optical absorption.
- In-situ rapid thermal treatment during ZnO film sputtering.
Main Results:
- In-situ thermal treatment altered AuNP morphology, modifying the plasmon band profile in absorption spectra.
- Results were compared with previous studies on sputtered ZnO films with AuNPs.
- Simulations suggest AuNPs-ZnO/Au/GP structures reflect/absorb UV and infrared radiation.
Conclusions:
- Nanoparticle morphology significantly impacts optical properties.
- The developed structures demonstrate potential for selective UV and IR radiation management.
- These findings support the use of AuNPs-embedded ZnO as advanced window coatings.
