Method of fabrication of fibers, textiles and composite materials
AssigneeLos Alamos National Security, LLC
InventorJames L. Maxwell
Life of this patent
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Abstract
A method of growing a plurality of free-standing structures comprises providing a plurality of free-standing structures, each free-standing structure having a first end coupled to a substrate, and a terminal end; providing at least one laser beam, the laser beam having a beam waste at a point proximate to the terminal end of the free-standing structure; and moving one of the plurality of freestanding structures or the beam waste to provide a growth zone proximate to the terminal end of each of the free-standing structures such that the free-standing structures grow into the growth zones by addition of decomposing precursor components. The growth rates of each of the free-standing structures are substantially the same.
Claims23
A method of growing a plurality of free-standing structures comprising:
- providing a plurality of free-standing structures, each free-standing structure having a first end coupled to a substrate, and a terminal end;
- providing at least one laser beam, the laser beam having a beam waist at a point proximate to the terminal end of the free-standing structure;
- moving one of the plurality of free-standing structures or the beam waist to provide a growth zone proximate to the terminal end of each of the free-standing structures such that the free-standing structures grow into the growth zones by addition of decomposing precursor gas components;
- maintaining growth rates of each of the free-standing structures substantially the same in-parallel in a state of mass-transport limitation by limiting the amount of precursor gas components supplied to the growth zone to rate-limit growth of the free-standing structures.
A method of growing a plurality of free-standing structures comprising:
- providing a plurality of free-standing structures, each free-standing structure having a first end coupled to a substrate, and a terminal end;
- providing at least one precursor gas at a total pressure greater than 1 bar;
- providing a laser beam split into a plurality of beamlets, each of the plurality of beamlets having a beam waist at a point proximate to the terminal end of one of the plurality of free-standing structures;
- positioning at least one of the plurality of freestanding structures or at least one of the beam waists to provide a growth zone proximate to the terminal end of the at least one of the plurality of free-standing structures such that the free-standing structures grow into the growth zones by addition of decomposing precursor gas components;
- adjusting the intensity of at least one of the beamlets based upon measurements of the relative location, temperature, and/or growth rate of each free-standing structure so as to maintain the growth rates of each of the free-standing structures substantially the same.
Dependencies are inferred from the claim text.