Abstract
Foldable organic memory on cellulose nanofibril paper with bendable and rollable characteristics is demonstrated by employing initiated chemical vapor deposition (iCVD) for polymerization of the resistive switching layer and inkjet printing of the electrode, where iCVD based on all-dry and room temperature process is very suitable for paper electronics. This memory exhibits a low operation voltage of 1.5 V enabling battery operation compared to previous reports and wide memory window. The memory performance is maintained after folding tests, showing high endurance. Furthermore, the quick and complete disposable nature demonstrated here is attractive for security applications. This work provides an effective platform for green, foldable and disposable electronics based on low cost and versatile materials.
Highlights
A simple structure, a wide choice of materials is important with regard to flexibility
Organic materials with superior elasticity and mechanical bendability and attributes of low-cost and low-temperature fabrication have already contributed to the growth of flexible electronics[26,27,28]
We demonstrate foldable organic memory built on a nano-fibrillated cellulose paper
Summary
Unlike the photo paper and the sticker paper, the LED bulb connected to a power supply via the Ag line formed on the nanopaper was successfully turned on after iterative folding exceeding hundred times This result confirms that nano-particle-based inkjet printing can be successfully performed on nanopaper without a polymer coating to improve the surface roughness. The unfolded memory after making the origami shows nonvolatile and reliable characteristics up to 102 switching cycles, indicating an acceptable memory window (ratio of high to low resistance states) of 102 and a uniform operation voltage distribution near 1 V (refer to Supplementary Information S3). The inkjet-printed pattern formed on nanopaper shows stable conductivity under a folded state, and the nanopaper-based memory exhibits reliable nonvolatile memory performance even after the extent of folding the device into origami. This study provides a platform for foldable electronics and ensuing applications embracing green, disposable, and wearable electronics
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