Monocrystalline gold microplates methods of fabrication thereof and devices comprising same
AssigneeB. G. Negev Technologies and Applications Ltd., At Ben-Gurion University
InventorMuhammad Y. BASHOUTI
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Abstract
A sensor is disclosed. The sensor comprises a substrate; and a gold pattern attached to the substrate, wherein the gold pattern is made from a plurality of repeating units, each unit is made from at least one line having a width of between 100 to 500 nm and a length of between 1 to 50 microns, and wherein a first distance between two neighboring units is between 50 to 1000 nm, and wherein all lines in the pattern, are originated from a monocrystalline gold, therefore, have the same crystallographic orientation with respect to the substrate.
Claims27
A sensor comprising:
- a substrate;
- and
- a gold pattern attached to the substrate,
- wherein the gold pattern is made from a plurality of repeating units, each unit is made from at least one line having a width of between 100 to 500 nm and a length of between 1 to 50 microns, and wherein a first distance between two neighboring units is between 50 to 1000 nm,
- and wherein all lines in the pattern, are originated from a monocrystalline gold microparticle, therefore, have the same crystallographic orientation with respect to the substrate.
A microparticle, wherein:
- at least 99.999% by weight of said microparticle consist of a monocrystalline gold;
- a surface area of said microparticle particle is between 0.006 mm2 and 1 mm;
- a thickness of said microparticle is between 10 and 100 nm.
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A method of manufacturing a microparticle for a sensor, comprising
- a. providing a reaction mixture comprising a gold salt, a reducing agent, and a solvent;
- b. providing said reaction mixture to a temperature of between 25 and 150° C. for a time period of between 60 min and 5 h;
- c. aging said reaction mixture for a time period of between 60 min and 7 days, thereby obtaining said microparticle;
- wherein:
- said gold salt comprises Au(III) cation;
- said reducing agent is capable of reducing said Au(III) cation to an elemental state;
- and wherein a concentration of said gold salt within said reaction mixture is between 0.03 and 0.3 mM,
- wherein said microparticle comprises:
- at least 99.999% by weight of said microparticle consist of a monocrystalline gold;
- a surface area of said microparticle particle is between 0.006 mm2 and 1 mm;
- a thickness of said microparticle is between 10 and 100 nm.
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Dependencies are inferred from the claim text.