Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Microplasmas"”.
-
Particle modeling of non-equilibrium field emission driven RF microplasmas
<p>Non-equilibrium microplasmas at atmospheric pressures have been investigated for active flow control, micropropulsion and electronic display applications to name a few. The operational voltages for these microplasmas are on the order of kilovolts. When the electric field at the electrodes …
-
Reconfigurable, two-dimensional plasma photonic crystals
Photonic crystals, composed of arrays of microplasmas, affect the propagation of electromagnetic waves and can act as reconfigurable filters in the GHz-THz spectral regions. Plasma photonic crystals are reconfigurable at electronic speeds. In addition, they rapidly alter the transmission …
-
Addressable plasma photonic crystals
Photonic crystals that comprise arrays of microplasmas can act as recon g- urable lters in the microwave and THz spectral regions. When compared to conventional photonic crystals fabricated in a solid, plasma photonic crystals are recon gurable at electronic speeds which, in turn, allows for the …
-
Electromagnetically active artificial material comprising multidimensional microplasma photonic crystals
… photonic crystals comprising of columnar microplasmas as the active component have been realized in the Laboratory for Optical Physics and Engineering (LOPE) at the University of Illinois. Real-time tuning of the propagation properties of the crystals in the 110-170 GHz spectral interval …
-
Analytical evaluation of microplasma technologies for production of hydrogen fuel from water
… H2O2. The current work advances the potential of microplasmas for H2 production. Proof-of-concept experiments demonstrate the reliable and repeatable production of H2 from water vapor in microplasma channels. Hydrogen is produced in both the presence and absence of a carrier gas. Relevant physical …
-
Reconfigurable antennas based on microplasma as a time-varying dielectric or conductor
… Photonic crystals comprising Bragg layers of microplasmas interspaced with air were made with arrays of microplasma jets. Room temperature vulcanization silicone was solidified from the liquid form within specific shaped mold to guide an array of microplasma jets. The pitch and diameter of …
-
Al/Al2O3 microchannel plasma chemical reactor for ozone synthesis
Ozone is produced efficiently in arrays of linear microplasmas at low temperatures and generated within alumina (Al2O3) microchannels. The array of microchannels device is fabricated from aluminum foil by chemical processing and mechanical ablation with photolithographic steps. Channels with 3 cm …
-
Microplasma chemical reaction enhancement by laser modification of dielectric surface topography
… increase of ~75% has been achieved by combining microplasmas with the new ablation technique and the H2 mixing. Optical emission spectroscopy observation shows that the CO2+ Fox-Duffendack-Barker system is dominant at low H2 flow rates, but the CO Angstrom bands start to dominate as H2 in the …
-
Diatomic excimer dynamics in microplasma lamps and alkali lasers
… in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas and He2 molecules that are of considerable interest as efficient near-infrared lasers, or as the energy source for …
-
Coupled phenomena in arrays of microplasma devices and microchannel plasma devices as antennas
… blasting was proposed and demonstrated. The microplasmas were optically and electrically probed in this work. The investigation showed that each plasma is physically separated and yet, under the proper conditions, is optically and/or electrically coupled to its neighbors. In arrays as large …
-
Microwave-assisted pyrolysis of HDPE using an activated carbon bed
… enhanced by the formation of microwave-induced microplasmas. Overall, the microwave-assisted pyrolysis of HDPE using activated carbon produces a much narrower range of more valuable products compared with non-catalytic processing. While the process is not likely to be economic in its current …
-
Design of multidimensional microplasma array for biofilm removal and dynamic photonic crystals
… into dielectric/metal structures. Because the microplasmas are generated within a 3D network of microchannels fabricated in the polymer, the result is a transient double crystal in which the microplasma network and polymer scaffold are coupled. The enhanced spatial and temporal coupling offer …