METHOD FOR PATTERNING METAL USING NANOPARTICLE CONTAINING PRECURSORS

• US 20100132507A1
• Filed: 10/23/2009
• Published: 06/03/2010
• Est. Priority Date: 12/15/2000
• Status: Active Grant

• Current Assignee: Arizona Board of Regents (University of Arizona)
• Original Assignee: Arizona Board of Regents (University of Arizona)
• Inventors: Stellacci, Francesco, Marder, Seth R., Perry, Joseph W.
• Granted Patent: US 8,557,017 B2
• Time in Patent Office: Days
• US Class Current: 75/345
• CPC Class Codes: B22F 1/0545 Dispersions or suspensions of nanosized particles
• CPC Class Codes: B22F 1/056 Submicron particles having a size above 100 nm up to 300 nm
• CPC Class Codes: B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: H01B 1/02 mainly consisting of metals or alloys
• CPC Class Codes: H01B 1/22 the conductive material comprising metals or alloys
• CPC Class Codes: H01L 21/76838 characterised by the formation and the after-treatment of the conductors etching for patterning the conductors H01L21/3213
• CPC Class Codes: Y10S 977/783 Organic host/matrix, e.g. lipid
• CPC Class Codes: Y10T 428/12181 Composite powder [e.g., coated, etc.]
• CPC Class Codes: Y10T 428/2991 Coated
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31942 Of aldehyde or ketone condensation product

Abstract

Continuous, conducting metal patterns can be formed from metal nanoparticle containing films by exposure to radiation (FIG. 1). The metal patterns can be one, two, or three dimensional and have high resolution resulting in feature sizes in the order of micron down to nanometers Compositions containing the nanoparticles coated with a ligand and further including a dye, a metal salt, and either a matrix or an optional sacrificial donor are also disclosed.

Claims

1. A method for growth of a pre-nucleated metal nanoparticle, comprising:

providing said pre-nucleated metal nanoparticle in a composite;

generating a metal atom by reducing a metal ion by exposure to radiation;

reacting said metal atom with said pre-nucleated metal nanoparticle, thereby growing a metal nanoparticle.

2. The method according to claim 1, further comprising collapsing of at least two metal nanoparticles, thereby obtaining metallic continuous phase.

3. The method according to claim 1, wherein said metal atom is generated from the metal ion by using an electron-beam.

4. The method according to claim 1, wherein said metal atom is generated by laser excitation of a molecule, thereby generating heat and causing thermal reduction of the metal ion.

5. The method according to claim 1, wherein said metal atom is generated by photo-excitation of a molecule, thereby creating an excited state of said molecules and increasing a reducing potential of said molecule;

and

reducing of said metal ion by said molecule in said excited state to obtain the metal atom.

6. A method for growth of a pre-nucleated metal nanoparticle, comprising:

forming a film from said pre-nucleated metal nanoparticle, a metal salt, a dye and a polymer matrix;

generating a metal atom by reducing a metal ion of said metal salt by exposure to radiation;

reacting said metal atom with said pre-nucleated metal nanoparticle, thereby growing a metal nanoparticle.