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Combinatorial synthesis methods obtain a plurality of compositions having materially different characteristics using an apparatus having a plurality of collectors. A first quantity of fluid reactants are reacted to form a first quantity of product composition. Following completion of the collection

Combinatorial synthesis methods obtain a plurality of compositions having materially different characteristics using an apparatus having a plurality of collectors. A first quantity of fluid reactants are reacted to form a first quantity of product composition. Following completion of the collection of the first quantity of product composition, a second quantity of fluid reactants are reacted to form a second quantity of product composition, the second quantity of product composition being material different from the first quantity of product composition. An apparatus includes a nozzle connected to a reactant source and a plurality of collectors. The nozzle and plurality of collectors move relative to each other such that a collector can be selectively placed to receive a fluid stream emanating from the nozzle. The plurality of product compositions can be evaluated to determine their suitability for various applications.

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What is claimed is: 1. A method for obtaining a plurality of quantities of compositions with an apparatus comprising a plurality of collectors and a nozzle comprising a reactant inlet, the method comprising: reacting a first quantity of fluid reactants within a fluid stream comprising gas, vapor, a

What is claimed is: 1. A method for obtaining a plurality of quantities of compositions with an apparatus comprising a plurality of collectors and a nozzle comprising a reactant inlet, the method comprising: reacting a first quantity of fluid reactants within a fluid stream comprising gas, vapor, aerosol or a combination thereof, at least a portion of of the reactants is from the reactant inlet, to form a first quantity of product composition; collecting the first quantity of product composition from the fluid stream using a first collector; moving the nozzle relative to the first collector and second collector following completion of the collection of the first quantity of product composition; following completion of the collection of the first quantity of product composition, reacting a second quantity of fluid reactants within the fluid stream at least a portion of which is from the reactant inlet to form a second quantity of product composition, the second quantity of product composition being materially different from the first quantity of product composition; and collecting the second quantity of product composition from the fluid stream using a second collector along a flow path independent from the first collector. 2. The method of claim 1 wherein the composition of the second quantity of fluid reactants is different from the composition of the first quantity of fluid reactants. 3. The method of claim 1 wherein a reaction condition during the reaction of the second quantity of fluid reactants is different from the reaction condition during the reaction of the first quantity of fluid reactants. 4. The method of claim 3 wherein the reaction condition is selected from the group consisting of pressure, reactant flux, reactant temperature, amount of inert diluent, amount of radiation absorbing gas, and energy input. 5. The method of claim 1 wherein the nozzle comprises a plurality of reactant inlets. 6. The method of claim 1 wherein the nozzle remains fixed and the collectors are moved relative to the nozzle. 7. The method of claim 1 wherein the collectors remain fixed and the nozzle is moved relative to the collectors. 8. The method of claim 1 wherein the apparatus has a radiation path defined by a radiation source and directing optical elements and wherein the reacting of the fluid reactants involves interacting radiation from the radiation source with the reactants. 9. The method of claim 8 wherein the radiation source is an infrared laser. 10. The method of claim 1 wherein the reactions are performed in a reaction chamber sealed from the ambient environment. 11. The method of claim 10 wherein the compositions comprise particles and the apparatus further comprises a pump and valves, and wherein the valves are opened and closed such that the first collector is exposed to the forces of the pump while the first quantity of particles are being collected and the second collector is exposed to the forces of the pump while the second quantity of particles are being collected. 12. The method of claim 1 further comprising evaluating the properties of the first quantity of product composition and the second quantity of product composition. 13. The method of claim, 1 wherein the first quantity of product composition and the second quantity of product composition comprise solid particles. 14. The method of claim 1 wherein the first quantity of product composition and the second quantity of product composition comprises a metal. 15. The method of claim 1 wherein the first quantity of product composition and the second quantity of product composition comprises chemical powders selected from the group consisting of metal/metalloid oxides, metal/metalloid carbides, metal/metalloid nitrides, and metal/metalloid sulfides. 16. The method of claim 1 wherein the first quantity of fluid reactants and the second quantity of fluid reactants comprise vapor reactants. 17. The method of claim 1 wherein the first quantity of fluid reactants and the second quantity of fluid reactants comprise aerosol reactants. 18. The method of claim 1 wherein first quantity of fluid reactants and the second quantity of fluid reactants comprise a metal/metalloid compound. 19. The method of claim 1 wherein one of the quantity of reactants is introduced into a reaction zone through a plurality of inlets oriented such that the reactants combine after they pass through the inlets, the reaction of the one quantity of reactants taking place within the reaction zone. 20. The method of claim 12 wherein the first quantity of product composition and the second quantity of product composition are solids having a corresponding solid structure and the step of evaluating the properties comprises evaluating the crystal structure by x-ray diffraction. 21. The method of claim 12 wherein the first quantity of product composition and the second quantity of product composition are particulate solids and the step of evaluating the properties comprises evaluating particle size using dynamic light scattering. 22. The method of claim 12 wherein the step of evaluating the properties comprises evaluations of optical properties. 23. The method of claim 22 wherein the optical properties are selected from the group consisting of emission, absorption, Raman scattering, fluorescence and combinations thereof. 24. The method of claim 12 wherein the step of evaluating the properties comprises measurement of electroactive properties. 25. The method of claim 12 wherein the step of evaluating the properties comprises measurement of electrical properties or magnetic properties. 26. The method of claim 12 wherein the step of evaluating the properties is performed without removing the products from the collectors. 27. The method of claim 12 wherein the step of evaluating the properties is performed after removing the products from the collectors. 28. A method for obtaining a plurality of quantities of compositions with an apparatus comprising a plurality of collectors and a reactant delivery system comprising a first quantity of fluid reactants and a second quantity of fluid reactants being different from the first quantity of fluid reactants, the method comprising: reacting the first quantity of fluid reactants within a fluid stream comprising gas, vapor, aerosol or a combination thereof, to form a first quantity of product composition; collecting the first quantity of product composition from the fluid stream using a first collector; following completion of the collection of the first quantity of product composition, reacting the second quantity of fluid reactants within the fluid stream to form a second quantity of product composition, the second quantity of product composition being materially different from the first quantity of product composition, wherein the second quantity of fluid reactant is different from the first quantity of fluid reactants; and collecting the second quantity of product composition from the fluid stream using a second collector. 29. The method of claim 28 wherein the first quantity of fluid reactants comprises a different proportion of compounds relative to the second quantity of fluid reactants. 30. The method of claim 28 wherein the first quantity of fluid reactants comprises different compounds than the second quantity of fluid reactants. 31. The method of claim 28 wherein the apparatus comprises a nozzle comprising a reactant inlet that moves relative to the plurality of collectors and wherein the nozzle is moved relative to the first collector and second collector following completion of the collection of the first quantity of product composition, at least a portion of the first quantity of fluid reactants being from the reactant inlet and at least a portion of the second quantity of second fluid reactants being from the reactant inlet. 32. The method of claim 28 wherein the apparatus has a radiation path defined by a radiation source and directing optical elements and wherein the reacting of the fluid reactants involves interacting radiation from the radiation source with the reactants. 33. The method of claim 28 further comprising evaluating the properties of the first quantity of product composition and the second quantity of product composition. 34. A method for obtaining a plurality of quantities of compositions with an apparatus comprising a plurality of collectors and a reaction chamber isolated from the ambient environment, the method comprising: reacting in the reaction chamber a first quantity of fluid reactants within a fluid stream comprising gas, vapor, aerosol or a combination thereof, to form a first quantity of product composition; collecting the first quantity of product composition from the fluid stream using a first collector; following completion of the collection of the first quantity of product composition, reacting in the reaction chamber a second quantity of fluid reactants within the fluid stream to form a second quantity of product composition, the second quantity of product composition being materially different from the first quantity of product composition, wherein at least one reaction condition during the formation of the second quantity of product compositions is different from the reaction condition during the formation of the first quantity of product compositions and wherein the reaction chamber remains isolated from the ambient environment continuously from the reacting of the first quantity of reactants and through the reacting of the second quantity of reactants; and collecting the second quantity of product composition from the fluid stream using a second collector. 35. The method of claim 34 wherein the at least one reaction condition is selected from the group consisting of pressure, reactant flux, reactant temperature, amount of inert diluent, amount of radiation absorbing gas, and energy input. 36. The method of claim 34 wherein the apparatus comprises a nozzle comprising a reactant inlet that moves relative to the plurality of collectors and wherein the nozzle is moved relative to the first collector and second collector following completion of the collection of the first quantity of product composition, at least a portion of the first quantity of fluid reactants being from the reactant inlet and at least a portion of the second quantity of second fluid reactants being from the reactant inlet. 37. The method of claim 34 wherein the apparatus has a radiation path defined by a radiation source and directing optical elements and wherein the reacting of the fluid reactants involves interacting radiation from the radiation source with the reactants. 38. The method of claim 34 further comprising evaluating the properties of the first quantity of product composition and the second quantity of product. 39. A method for obtaining a plurality of quantities of compositions with an apparatus comprising a plurality of collectors and a nozzle comprising a reactant inlet wherein the apparatus has a radiation path defined by a radiation source and directing optical elements, the method comprising: reacting a first quantity of fluid reactants within a fluid stream at least a portion of which is from the reactant inlet to form a first quantity of product composition; collecting the first quantity of product composition from the fluid stream using a first collector; following completion of the collection of the first quantity of product composition, reacting a second quantity of fluid reactants within the fluid stream at least a portion of which is from the reactant inlet to form a second quantity of product composition, the second quantity of product composition being materially different from the first quantity of product composition; and collecting the second quantity of product composition from the fluid stream using a second collector along a flow path independent from the first collector, wherein the reacting of the fluid reactants involves interacting radiation from the radiation source with the reactants. 40. The method of claim 39 wherein the radiation source is an infrared laser. 41. The method of claim 39 further comprising moving the nozzle relative to the first collector and second collector following completion of the collection of the first quantity of product composition. 42. The method of claim 39 wherein the second quantity of fluid reactant is different from the first quantity of fluid reactants. 43. The method of claim 39 wherein at least one reaction condition during the formation of the second quantity of product compositions is different from the reaction condition during the formation of the first quantity of product compositions. 44. The method of claim 39 wherein the reactions are performed in a reaction chamber sealed from the ambient environment. 45. The method of claim 39 further comprising evaluating the properties of the first quantity of product composition and the second quantity of product composition. 46. The method of claim 39 wherein the first quantity of product composition and the second quantity of product composition comprises a metal. 47. The method of claim 39 wherein the first quantity of fluid reactants and the second quantity of fluid reactants comprise a metal/metalloid compound.