Production of nanoparticles and microparticles
First Claim
1. A method of producing microparticles comprising the steps of:
- (a) providing a system including;
(i) a vessel containing a liquid;
(ii) at least a first pair of electrodes;
(iii) a mechanism for igniting an electrical arc between said electrodes;
(b) disposing said first pair of electrodes within said liquid, and (c) effecting at least one pulsed electrical discharge between said electrodes so as to produce a plasma bubble, and to produce the microparticles, the microparticles being associated with said plasma bubble. wherein said pulsed electrical discharge has a pulse duration of less than 1000 microseconds, and wherein said pulsed electrical discharge has a current amplitude of at least 1 ampere (A).
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Abstract
A method of producing microparticles including: (a) providing a system including: (i) a vessel containing a liquid; (ii) at least a first pair of electrodes; (iii) a mechanism for igniting an electrical arc between the electrodes; (b) disposing the first pair of electrodes within the liquid, and (c) effecting at least one pulsed electrical discharge between the electrodes so as to produce a plasma bubble, and to produce the microparticles, the microparticles being associated with the plasma bubble, wherein the pulsed electrical discharge has a pulse duration of less than 1000 microseconds, and wherein the pulsed electrical discharge has a current amplitude of at least 1 ampere (A).
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Citations
50 Claims
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1. A method of producing microparticles comprising the steps of:
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(a) providing a system including;
(i) a vessel containing a liquid;
(ii) at least a first pair of electrodes;
(iii) a mechanism for igniting an electrical arc between said electrodes;
(b) disposing said first pair of electrodes within said liquid, and (c) effecting at least one pulsed electrical discharge between said electrodes so as to produce a plasma bubble, and to produce the microparticles, the microparticles being associated with said plasma bubble. wherein said pulsed electrical discharge has a pulse duration of less than 1000 microseconds, and wherein said pulsed electrical discharge has a current amplitude of at least 1 ampere (A). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. An apparatus for producing particles comprising:
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a vessel for holding a liquid, at least one pair of electrodes, a mechanism for positioning one electrode of said pair with respect to the other electrode of said pair, a mechanism for generating a pulsed electrical discharge between the two electrodes of said electrode pair, a mechanism for removing said particles. - View Dependent Claims (45, 46, 47, 48)
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49. A particle comprising:
a metal and carbon, said particle having a substantially spherical shape, said particle having a diameter between 10 nm and 25 μ
m, and wherein a composition of said particle varies as a function of a distance from a center of said particle, such that a fraction of said metal decreases and a fraction of said carbon increases.- View Dependent Claims (50)
Specification