title: Printing Stretchable Spiral Interconnects Using Reactive Ink Chemistries.
abstract: Stretchable electronics have important applications in health monitoring and integrated lab-on-a-chip devices. This paper discusses the performance of serpentine stretchable interconnects printed using self-reducing, silver reactive inks. It details process optimization, device fabrication, and device characterization, while demonstrating the potential applications for reactive inks and new design strategies in stretchable electronics. Devices were printed with an ethanol stabilized silver diamine reactive ink and cycled to stretch ratios of 140 and 160% over 1000 cycles with less than 2.5% variation in electrical resistance. Maximum deformation before failure was measured at 180% elongation. Additionally, interconnect deformation was compared to finite element analysis (FEA) simulations to show that FEA can be used to accurately model the deformation of low-strain printed interconnects. Overall, this paper demonstrates a simple and affordable route toward stretchable electrical interconnects.
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Avinash
authors.initials: A
authors.lastname: Mamidanna
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Zeming
authors.initials: Z
authors.lastname: Song
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Cheng
authors.initials: C
authors.lastname: Lv
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Christopher S
authors.initials: CS
authors.lastname: Lefky
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Hanqing
authors.initials: H
authors.lastname: Jiang
authors.affiliation: School for the Engineering of Matter, Transport, and Energy, Arizona State University , Tempe, Arizona 85271, United States.
authors.forename: Owen J
authors.initials: OJ
authors.lastname: Hildreth
keywords: conductive inks; drop-on-demand; flexible electronics; printing; reactive inks; serpentine; stretchable electronics