Atmospheric-pressure glow plasma synthesis of plasmonic and photoluminescent zinc oxide nanocrystals
Abstract
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−1 due to oxygen vacancies. The particle size can be tuned to a degree by varying the gas temperature and the precursor mixing ratio.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 27, 2016
- Source ID
- 10.1063/1.4954323
Entities
People
- Benjamin L Greenberg
- E. S. Aydil
- Jeremy Yang
- Narula Bilik
- U. R. Kortshagen
Organizations
- Army Research Office
- National Science Foundation
- United States Department of Energy
- University of Minnesota