Copper nanocrystals and methods of producing same
First Claim
1. A method of making monodisperse nanocrystals comprising the steps:
- (a) reducing a copper salt with a reducing agent to obtain reduced copper;
(b) providing a passivating agent to contact said reduced copper, wherein said passivating agent comprises at least one moiety selected from the group consisting of a nitrogen donor and an oxygen donor;
(c) isolating said nanocrystals comprising said reduced copper.
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Abstract
The invention relates to methods of making monodisperse nanocrystals comprising the steps of reducing a copper salt with a reducing agent, providing a passivating agent comprising a nitrogen and/or an oxygen donating moitey and isolating the copper nanocrystals. Moreover, the invention relates to methods for making a copper film comprising the steps of applying a solvent comprising copper nanocrystals onto a substrate and heating the substrate to form a film of continuous bulk copper from said nanocrystals. Finally, the invention also relates to methods for filling a feature on a substrate with copper comprising the steps of applying a solvent comprising copper nanocrystals onto the featured substrate and heating the substrate to fill the feature by forming continuous bulk copper in the feature.
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Citations
16 Claims
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1. A method of making monodisperse nanocrystals comprising the steps:
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(a) reducing a copper salt with a reducing agent to obtain reduced copper;
(b) providing a passivating agent to contact said reduced copper, wherein said passivating agent comprises at least one moiety selected from the group consisting of a nitrogen donor and an oxygen donor;
(c) isolating said nanocrystals comprising said reduced copper. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification