Air stable copper nanoparticle ink and applications therefor
First Claim
Patent Images
1. A copper nanoparticle ink composition, comprising:
- copper nanoparticles;
a substituted dithiocarbonate stabilizer comprising an ether alcohol based xanthate compound of formula;
R1—
X—
R2—
C(═
S)S−
M+where;
M is counter cation;
each of R1 and R2 is independently a substituted or unsubstituted organic group having from 1 to about 20 carbon atoms, optionally having one or more heteroatoms; and
X is a heteroatom; and
a carrier solvent;
wherein the stabilizer stabilizes the copper nanoparticles.
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Abstract
Low-cost copper nanoparticle inks that can be annealed onto paper substrate for RFID antenna applications, using substituted dithiocarbonates as stabilizers during copper nanoparticle ink production.
26 Citations
14 Claims
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1. A copper nanoparticle ink composition, comprising:
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copper nanoparticles; a substituted dithiocarbonate stabilizer comprising an ether alcohol based xanthate compound of formula;
R1—
X—
R2—
C(═
S)S−
M+where; M is counter cation; each of R1 and R2 is independently a substituted or unsubstituted organic group having from 1 to about 20 carbon atoms, optionally having one or more heteroatoms; and X is a heteroatom; and a carrier solvent; wherein the stabilizer stabilizes the copper nanoparticles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13)
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8. A process for forming a copper nanoparticle ink composition, comprising:
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providing a substituted dithiocarbonate stabilizer comprising an ether alcohol based xanthate compound of formula;
R1—
X—
R2—
C(═
S)S−
M+where; M is counter cation; each of R1 and R2 is independently a substituted or unsubstituted organic group having from 1 to about 20 carbon atoms, optionally having one or more heteroatoms; and X is a heteroatom; and stabilizing a copper nanoparticle dispersion with the substituted dithiocarbonate stablizer in a solvent medium. - View Dependent Claims (9, 10, 14)
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Specification