Kit for preparing a conductive pattern
OwnerSimona Magdalena Rucareanuinventor
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Abstract
The invention relates to a kit for preparing a conductive element comprising a container A containing a liquid dispersion A′, comprising dispersed nanoparticles having a metallic surface and a ligand capable of binding to said surface; a container B—which may be the same or different as the container A containing the liquid dispersion A′—said container B containing a liquid B′ comprising reducible silver ions or other reducible metal ions; and a further container C containing a liquid C′ comprising a reducing agent for the metal ions of the liquid from container B.
Claims16
Kit for preparing a conductive element comprising
- a container A containing a liquid dispersion A′, comprising dispersed nanoparticles having a metallic surface and a ligand capable of binding to said surface;
- a container B—which may be the same or different as the container A containing the liquid dispersion A′—said container B containing a liquid B′ comprising reducible silver ions or other reducible metal ions;
- and
- a further container C containing a liquid C′ comprising a reducing agent for the metal ions of the liquid from container B.
Kit according to any one of the preceding claims, wherein a least one ligand is present selected from the group of aliphatic amines, aromatic amines, aliphatic quaternary ammonium compounds, carboxylic acids and amino acids,
- in particular from the group of aliphatic amines comprising one or more alkyl groups, each alkyl group having 1-18 carbon atoms;
- aliphatic amines comprising one or more alkene groups having 2-18 carbon atoms;
- C3-C18 aliphatic monocarboxylic acids;
- aliphatic polycarboxylic acids comprising up to 20 carbon atoms;
- C1-C18 aliphatic amino acids;
- amino pyridines, wherein to the amino group of the pyridine one or two C1-C6 alkyl groups may be attached;
- tetraalkyl ammonium compounds, wherein each of the alkyl groups is independently selected from C1-C18 alkyls,
- and more in particular from the group of glutamic acid, aspartic acid, 7-aminoheptanoic acid, 11-aminoundecanoic acid, citric acid, 4-(N,N-dimethylamino)pyridine, 1-amino-9-octadecene, lactic acid, malic acid, maleic acid, succinic acid and tartaric acid.
Kit according to any of the preceding claims, wherein the ligand content is in the range of 5 to 30 wt. %, preferably in the range of 5 to 15 wt. %, based on the total mass of the nanoparticles.
Kit according to any of the preceding claims, wherein the particles are selected from the group of gold nanoparticles, silver nanoparticles, gold-silver alloy nanoparticles, copper-silver alloy nanoparticles, copper-gold alloy nanoparticles, copper-palladium alloy nanoparticles, aluminum-silver alloy nanoparticles, aluminum-gold alloy nanoparticles, and aluminum-palladium alloy nanoparticles and nanoparticles with a core-shell morphology of which the shell is made of gold, silver, gold-silver alloy, or palladium.
Kit according to any of the preceding claims, wherein the reducible metal ions are of a salt selected from the group of nitrate salts, nitrite salts, carbonate salts, sulfate salts, phosphate salts, chlorate salts, perchlorate salts, fluoride salts, chloride salts, iodide salts, tetrafluoroborate salts, acetate salts, trifluoroacetate salts, pentafluoropropionate salts, lactate salts, citrate salts, oxalate salts, tosylate salts, methanesulfonate salts, and trifluoromethanesulfonate salts.
Kit according to any of the preceding claims, wherein the reducible metal ions are of a metal salt, and the concentration of said salt in the liquid is between 20-80 wt. % based on the total weight of the liquid, in particular 25-70 wt. %, more in particular 30-60 wt. %.
Kit according to any of the preceding claims, wherein the reducing agent is present in a concentration of 5-25 wt. % based on the liquid comprising the reducing agent.
Kit according to any of the preceding claims, wherein the liquid dispersion A′, the liquid B′ comprising the reducible metal salt and the liquid C′ comprising the reducing agent are fluid at 25° C.
Nanoparticles comprising a silver alloy or a gold alloy, in particular an alloy of gold and silver, of which particles the surfaces have been provided with a ligand selected from the group of quaternary ammonium compounds.
Method for preparing a conductive element, comprising applying
- a liquid dispersion A′, comprising dispersed nanoparticles having a metallic surface to which surface a ligand is bound;
- a liquid B′ comprising a reducible silver ion or another reducible metal ion;
- and
- a liquid C′ comprising a reducing agent for the metal ions;
- to a substrate and reducing the reducible salt, under formation of the conductive element.
Dependencies are inferred from the claim text.