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.