journal article·2021-07-07Open access

Low temperature chemical sintering of inkjet-printed Zn nanoparticles for highly conductive flexible electronic components

Subimal Majee, Mikael C. F. Karlsson, Pawel Jerzy Wojcik, Anurak Sawatdee, Mohammad Yusuf Mulla, Naveed ul Hassan Alvi, Peter Dyreklev, Valerio Beni, David Nilsson

npj Flexible Electronics· Volume 5· Issue 1

Abstract

Abstract This study illustrates an innovative way to fabricate inkjet-printed tracks by sequential printing of Zn nanoparticle ink and curing ink for low temperature in situ chemical sintering. Employing chemical curing in place of standard sintering methods leads to the advantages of using flexible substrates that may not withstand the high thermal budgets of the standard methods. A general formulation engineering method is adopted to produce highly concentrated Zn ink which is cured by inkjet printing an over-layer of aqueous acetic acid which is the curing agent. The experimental results reveal that a narrow window of acid concentration of curing ink plays a crucial role in determining the electrical properties of the printed Zn nanoparticles. Highly conductive (~105 S m−1) and mechanically flexible printed Zn features are achieved. In addition, from systematic material characterization, we obtain an understanding of the curing mechanism. Finally, a touch sensor circuit is demonstrated involving all-Zn printed conductive tracks.
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Research context

OpenAlex topics: Nanomaterials and Printing Technologies · Advanced Sensor and Energy Harvesting Materials · Additive Manufacturing and 3D Printing Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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