Precursors for Atmospheric Plasma-Enhanced Sintering: Low-Temperature Inkjet Printing of Conductive Copper.

Bidentate diamine and amino-alcohol ligands have been used to form solid, water-soluble, and air-stable monomeric copper complexes of the type [Cu(NH2 CH2 CH(R)Y)2 (NO3 )2 ] ( 1 , R=H, Y=NH2 ; 2 , R=H, Y=OH; 3 , R=Me, Y=OH). The complexes were characterized by elemental analysis, mass spectrometry, infrared spectroscopy, thermal gravimetric analysis, and single-crystal X-ray diffraction. Irrespective of their decomposition temperature, precursors 1 - 3 yield highly conductive copper features [1.5×10-6  Ω m (±5×10-7  Ω m)] upon atmospheric-pressure plasma-enhanced sintering.