Method for supporting metal nanoparticles and metal nanoparticles-carrying substrate
View Patent ↗A metal nano particle can be supported and immobilized on a substrate uniformly. Thus, disclosed is a method for supporting a nano metal particle, which comprises applying a silane coupling agent having at least one functional group capable of capturing a metal (e.g., an imidazole group, an amino group, a diamino group, a mercapto group, and a vinyl group) in its molecule on a substrate, and then contacting the silane coupling agent with a nano particle of a metal (e.g., gold, platinum, silver, copper, palladium, nickel, cobalt), wherein the silane coupling agent may be produced by the reaction between an azole compound with an epoxysilane compound, and wherein the metal nano particle to be contacted with the silane coupling agent is preferably coated with an ionic fluid. Also disclosed is a substrate having a metal nano particle supported thereon, which is produced by the method.
1. A method for supporting metal nanoparticles, comprising applying, to a substrate, a silane coupling agent having at least one functional group with metal-trapping ability per molecule and then bringing metal nanoparticles into contact with the substrate, the functional group with metal-trapping ability being selected from the group consisting of an imidazole group and a vinyl group.
2. The method according to claim 1 , wherein the functional group with metal-trapping ability is an imidazole group.
3. The method according to claim 1 wherein each metal nanoparticle comprises a metal nitride or a metal silicid.
4. The method according to claim 1 , wherein the metal nanoparticles brought into contact with the silane coupling agent are covered with an ionic liquid.
5. The method according to claim 4 , wherein the ionic liquid is selected from the group consisting of N,N,N-trimethyl-N-propylammonium bis(trifluoromethanesulfonyl)imide, N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide, N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)imide, and N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium tetrafluoroborate.
6. The method according to claim 1 , wherein the metal nanoparticles form wiring.
7. The method according to claim 1 , wherein the metal of the metal nanoparticles is an alloy of two or more metals selected from the group consisting of gold, platinum, silver, copper, palladium, nickel, cobalt, ruthenium, rhodium, rhenium, manganese, chromium, molybdenum, tungsten, niobium, tantalum, titanium, zirconium, hafnium, zinc, cadmium, aluminum, gallium, indium, tin, and silicon.
8. The method according to claim 1 , wherein the metal of the metal nanoparticles is a metal containing at least one of gold, platinum, silver, copper, palladium, nickel, cobalt, ruthenium, rhodium, rhenium, manganese, chromium, molybdenum, tungsten, niobium, tantalum, titanium, zirconium, hafnium, zinc, cadmium, aluminum, gallium, indium, tin or silicon.
9. The method according to claim 4 , wherein the ionic liquid is selected from the group consisting of 1,3-dialkylimidazolium salts and 1,2,3-trialkylimidazolium salts.
10. The method according to claim 4 , wherein the ionic liquid is selected from the group consisting of ethylpyridinium salts, butylpyridinium salts and hexylpyridinium salts.
11. The method according to claim 1 , wherein each metal nanoparticle comprises at least one of TaN, TiN, NiSi, and CoSi.
12. A metal nanoparticles-carrying substrate obtained by the method according to claim 1 .