Electrical Sintering of Silver Nanoparticle Ink Studied by In-Situ TEM ProbingReport as inadecuate




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Metallic nanoparticle inks are used for printed electronics, but to reach acceptable conductivity the structures need to be sintered, usually using a furnace. Recently, sintering by direct resistive heating has been demonstrated. For a microscopic understanding of this Joule heating sintering method, we studied the entire process in real time inside a transmission electron microscope equipped with a movable electrical probe. We found an onset of Joule heating induced sintering and coalescence of nanoparticles at power levels of 0.1–10 mW-m3. In addition, a carbonization of the organic shells that stabilize the nanoparticles were found, with a conductivity of 4 105 Sm−1.



Author: Magnus Hummelgård , Renyun Zhang, Hans-Erik Nilsson, Håkan Olin

Source: http://plos.srce.hr/



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