Method for coating ultrafine particles, system for coating ultrafine particles
The invention provides a method for dispersing particles within a reaction field, the method comprising confining the particles to the reaction field using a standing wave. The invention also provides a system for coating particles, the system comprising a reaction zone; a means for producing fluidized particles within the reaction zone; a fluid to produce a standing wave within the reaction zone; and a means for introducing coating moieties to the reaction zone. The invention also provides a method for coating particles, the method comprising fluidizing the particles, subjecting the particles to a standing wave; and contacting the subjected particles with a coating moiety.
1. A system for coating particles, the system comprising:
a. a reaction zone;
b. a means for producing fluidized particles within the reaction zone;
c. a means for producing a standing fluid wave in the reaction zone by modulating fluid flow of a fluidizing gas; and
d. a means for introducing coating moieties to the reaction zone.
2. The system as recited in claim 1 wherein the reaction zone contains an adjustable surface adapted to reflect the modulating fluid flow.
3. The system as recited in claim 1 wherein the means for producing a standing fluid wave causes the fluidizing fluid to contact the fluidized particles to produce the standing wave.
4. The system as recited in claim 3 wherein the modulating fluid flow is coherently applied to the fluidized particles.
5. The system as recited in claim 1 wherein the particles are no larger than 100 microns in diameter.
6. The system as recited in claim 1 wherein the coating moieties comprise at least a portion of the standing fluid wave.
7. The system as recited in claim 1 wherein the particles are different sizes.
8. The system as recited in claim 1 wherein the reaction zone is defined by a reaction chamber and the reaction chamber remains motionless.
9. The system as recited in claim 1 wherein the means for introducing coating moieties to the reaction zone includes a computer-controlled injections system with a fixed time interval between injections for alternatingly introducing two coating moieties into the reaction zone.