Atmospheric-pressure glow plasma synthesis of plasmonic and photoluminescent zinc oxide nanocrystals

Journal Article · Tue Jun 28 00:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4954323· OSTI ID:22596661

Greenberg, B. L.; Yang, J.; Aydil, E. S. ^[1]

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1. Department of Chemical Engineering, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

In this paper, we present a large-volume (non-micro) atmospheric pressure glow plasma capable of rapid, large-scale zinc oxide nanocrystal synthesis and deposition (up to 400 μg/min), whereas in the majority of the literature, nanoparticles are synthesized using micro-scale or filamentary plasmas. The reactor is an RF dielectric barrier discharge with a non-uniform gap spacing. This design encourages pre-ionization during the plasma breakdown, making the discharge uniform over a large volume. The produced zinc oxide nanocrystals typically have diameters ranging from 4 to 15 nm and exhibit photoluminescence at ≈550 nm and localized surface plasmon resonance at ≈1900 cm{sup −1} due to oxygen vacancies. The particle size can be tuned to a degree by varying the gas temperature and the precursor mixing ratio.

• OSTI ID: 22596661
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 24 Vol. 119; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATMOSPHERIC PRESSURE
BREAKDOWN
DEPOSITION
DIELECTRIC MATERIALS
IONIZATION
MIXING
MIXING RATIO
NANOPARTICLES
NANOSTRUCTURES
OXYGEN
PARTICLE SIZE
PHOTOLUMINESCENCE
PLASMA
PLASMONS
PRECURSOR
RESONANCE
SURFACES
SYNTHESIS
VACANCIES
ZINC OXIDES