Electrohydrodynamic dispersion of metals using electron-beam heating

Gorokhov, M. V.; Kozhevin, V. M.; Yavsin, D. A.; Gurevich, S. A.

doi:10.1134/s1063784208090041

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…It can be seen that these surfaces contain disk shaped nanoparticles without crystallographic face ting. This shape is characteristic of liquid metal drop lets, which are flattened in a collision with the sub strate [24].…”

Section: Resultsmentioning

confidence: 93%

Morphology, chemical composition, and electrical characteristics of hybrid (Ni-C) nanocomposite structures grown on the van der Waals GaSe(0001) surface

et al. 2014

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The morphology and chemical composition of metal (Ni), carbon, and composite (Ni-C) nano structures grown on oxidized and unoxidized (0001) surfaces of a layered GaSe crystal by electron beam vac uum evaporation of the material from a liquid ion source in an electric field have been investigated using atomic force microscopy and X ray photoelectron spectroscopy. It has been demonstrated that this technol ogy makes it possible to grow nanostructures with different morphologies depending on the growth mode and substrate surface state. Dense homogeneous arrays of nickel nanoparticles (Ni@C) (with geometrical sizes of 1-15 nm and a lateral density of higher than 10 10 cm -2 ) encapsulated into carbon shells, as well as carbon layers (with a thickness of the order of several nanometers), are grown on the unoxidized van der Waals GaSe(0001) surface, whereas Ni-C composite nanostructures are grown on the oxidized surface. The for mation of oxide nanostructures on the van der Waals surface and their chemical composition have been exam ined. Vertical hybrid Au/Ni/(Ni-C)/n Ga 2 O 3 (Ni@C)/p GaSe structures grown on the GaSe(0001) surface contain Ni@C nanoparticles embedded in the wide band gap n Ga 2 O 3 oxide. The current-voltage charac teristics of these structures at temperatures close to T = 300 K exhibit specific features of the Coulomb block ade effect.

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Section: Resultsmentioning

confidence: 93%

Morphology, chemical composition, and electrical characteristics of hybrid (Ni-C) nanocomposite structures grown on the van der Waals GaSe(0001) surface

et al. 2014

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“…To produce the initial microdrops, we designed an electrohydrodynamic source 5 based on atomization of a melt in an intense electric field. The melt is formed by bombardment of the top of a conical anode by an electron beam.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

“…The only way to disperse drops to the nanosized range lies in breaking up heavily charged drops, the essence of the method of electrohydrodynamic atomization. Present‐day methods of electrohydrodynamic atomization of metals are, however, capable of providing only fairly low rates of nanoparticle generation 2–5. In particular, the low rate of nanoparticle dispersion reached in the laser electrodispersion technique 2 is caused by the laser operating in pulsed mode.…”

Section: Introductionmentioning

confidence: 99%

New technique of amorphous metal nanoparticles production by liquid drop breakup in an electron beam

Gorokhov

Yavsin

Kozhevin

2012

Physica Status Solidi (a)

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Phone: þ7 (812) 292 73 92, Fax: þ7 (812) 297 10 17 We report a new technique of amorphous metal nanoparticles fabrication based on generation of liquid metal microdrops, their charging in electron flux with subsequent drops fission. Fission of charged metal drop occurs when its charge exceeds a critical value given by Rayleigh instability condition. Nanosize droplets, resulted from fission, cool down at extremely high rate to produce amorphous metal nanoparticles. Initial metal microdrops are generated at the end of an anode tip exposed to strong electric field and electron flux focused to the tip. The emitted drops then enter an electron beam where they are charged up to instability and are involved in fission process. To eliminate secondary electron emission (SEE) which can prevent drop charging we used electron beams of low energy. With beam energy properly chosen, SEE coefficient is less then unity for all drop sizes and drop charging up to unstable state is ensured. Granular films consisting of amorphous copper particles 2 nm in size are fabricated by the described technique. The results of atomic force microscopy (AFM) and transmission electron microscopy (TEM) studies of the fabricated films are presented. Possible applications of the fabricated structures related to their unusual properties are considered.

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