Harmonic spraying of conducting liquids employing AC-DC electric fields

Huneiti, Zayed; Balachandran, W.; Machowski, W.

doi:10.1109/28.663469

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…Increasing the applied frequency narrowed the range of droplet size. The phenomenon could be explained in aspect of the surface charges of the droplet that drives the first instability and lateral instability [18]. For high frequency electric field, the surface charge can be dramatically reduced, so that the size uniformity could be obtained and also the size of electrosprayed droplet might be increased [16,17].…”

Section: Resultsmentioning

confidence: 99%

Production of microsized PMMA droplets using electrospraying with various auxiliary fields

Kim

Park²,

Han³

2006

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Production of microsized PMMA droplets using electrospraying with various auxiliary fields

Kim

Park²,

Han³

2006

Journal of Colloid and Interface Science

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“…44−47 Application of frequencies somewhat higher than the natural rate of droplet emission may reduce droplet sizes for a chosen liquid flow rate. 47 Assuming a stream of individual droplets released at the tip of the jet, the rate of droplet emission follows as…”

Section: ■ Theoretical Backgroundmentioning

confidence: 99%

“…Improvements of spray stability and range of sustainable flow rates may be achieved by superimposing an ac-voltage to the constant high voltage between the electrodes. − Application of frequencies somewhat higher than the natural rate of droplet emission may reduce droplet sizes for a chosen liquid flow rate . Assuming a stream of individual droplets released at the tip of the jet, the rate of droplet emission follows as f E = 6 Q D 3 π = 6 π ( K ε 0 ) δ − 1 g false( δ , β false) − 3 …”

Section: Theoretical Backgroundmentioning

confidence: 99%

Electrospray Flame Synthesis of Yttria-Stabilized Zirconia Nanoparticles

Geier

Parker

2013

Ind. Eng. Chem. Res.

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In this study, the technological feasibility of an electrospray-based flame synthesis process for the production of thin films of nanosized metal oxide particulates was investigated. On the basis of published results on electro-hydrodynamic atomization, a spray system was designed, implemented, and tested. Initial tests focused on synthesis of yttria-stabilized zirconia (YSZ) particulates, and the results showed that aggregates with quasi-monodisperse primary particle sizes below 100 nm with cubic-fluorite crystal phase composition can be manufactured through this production route. These tests utilized organometallic solutions of Zr-n-propoxide and Y-2-methoxyethoxide in a mixture of n-propanol and 2-methoxyethanol, which were electrosprayed into the postflame flow of a multielement diffusion burner. Both theoretical analysis and experimental evidence indicate that controlled synthesis of particulate with narrow particle size distribution is feasible. The radial arrangement of electrospray emitters chosen for the initial experiments appears to be a promising spray configuration for further development.

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“…The use of DC and AC external electric fields has been investigated for many years in nanotechnology. External electric-field-directed nanoparticle synthesis processes, − motion and precipitation of suspensions and bubbles in water, − suspension filtration characteristics, spray-coating characteristics, , drying rates of wet-coated layers, , nanoparticle deposition processes, − and sintering of ceramic nanoparticles , have been previously studied. These findings provide comprehensive tools for tailoring specific processing routes of functional and structural nanoceramic materials in applications ranging from lightweight and high-temperature-resistant engineering ceramics, bioceramics, electroceramics, and optoceramics to ceramic microstructures for electronics and sensor applications.…”

Section: Introductionmentioning

confidence: 99%

Directed Self-Assembly of Colloidal Model Systems on Charge-Selective Surfaces in External Electric Fields: Theory and Numerical Analysis

Falk

2012

J. Phys. Chem. B

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Membrane electrophoretic deposition has a long-established reputation in delivering high quality nanoparticle compact and coating solutions in the field of high performance nanoparticle architectures made from aqueous nanoparticle suspensions. Although for a long time, it has been common practice in nanoparticle science and particle-based nanotechnology to use membrane electrophoretic shaping of nanoparticles, little is known about long-range electrohydrodynamic manipulation of the engineered assembly of colloidal particles at the nanoscale. Here, we analyze the interfacial field-induced flow of a strong electrolyte and its implications for the directed self-assembly of colloidal nanoparticles on nonuniform charge-selective ion-exchange membrane surfaces as well as on conducting microelectrodes imposed to electrophoretic deposition boundary conditions. Numerical calculations of the vortex streamlines are derived for the case of extreme diffusion limitation, concentration polarization near the limiting current, and induced electric forces acting upon the residual space charge. The system is modeled by coupled mass balances, Ohmic law, Navier-Stokes, and Nernst-Planck equations. Particularly, numerical calculations under bulk electroconvection conditions show that the latter provides an efficient intrinsic interfacial mechanism capable of accounting for the experimentally observed local electrophoretic deposition behavior of nanoparticles at ideal permselective membranes with nonplanar periodic charge discontinuity and metal microelectrodes.

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Harmonic spraying of conducting liquids employing AC-DC electric fields

Cited by 7 publications

References 10 publications

Production of microsized PMMA droplets using electrospraying with various auxiliary fields

Production of microsized PMMA droplets using electrospraying with various auxiliary fields

Electrospray Flame Synthesis of Yttria-Stabilized Zirconia Nanoparticles

Directed Self-Assembly of Colloidal Model Systems on Charge-Selective Surfaces in External Electric Fields: Theory and Numerical Analysis

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