Reactive Sintering of Cu Nanoparticles at Ambient Conditions for Printed Electronics.

ABSTRACT: A new approach is presented to overcome the disadvantages of oxidation and harsh sintering conditions of Cu nanoparticle (Cu NP) conductive inks simultaneously. In this process, oleylamine (OAM) adsorbed on particles was effectively eliminated via the reactive desorption by formic acid in alcohols; meanwhile, Cu ion was generated on the surface. The desorption of OAM resulted in more severe surface oxidation of Cu NPs. The oxide (Cu₂O) and Cu²⁺ distributed on the Cu NP surface could be reduced to Cu(0) by NaBH₄ solution and take on the role of soldering flux to weld particles into a blocky structure. With the compact coalescence of particles without oxides, the resistivity of metal patterns could fall below 20 μΩ·cm and exhibit proper adhesion. Thanks to th

SUBMITTER: Dai X 

PROVIDER: S-EPMC7288703 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature