Foldable Electrochromics Enabled by Nanopaper Transfer Method

Kang, Wenbin; Yan, Chaoyi; Foo, Ce Yao; Lee, Pooi See

doi:10.1002/adfm.201500527

Cited by 100 publications

(103 citation statements)

References 58 publications

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“…[10][11][12][13][14][15][16] Therefore, nanopaper has recently received much attention as a substrate for flexible electronics. 9,[17][18][19][20][21][22][23][24][25][26][27][28][29] To date, various electronic devices including organic/inorganic thin-film transistors, 9,21-23 light-emitting diodes, 24 solar cells, 23,25,26 antennas 27,28 and triboelectric generators 29 have been demonstrated on nanopaper substrates. However, a nonvolatile memory, which is the essential component for IoE technology, has not been demonstrated on a nanopaper substrate so far.…”

Section: Introductionmentioning

confidence: 99%

All-nanocellulose nonvolatile resistive memory

et al. 2016

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Single-use disposable nonvolatile memory devices hold promise for novel applications in internet of everything (IoE) technology by storing the health status of individual humans in daily life. However, conventional memory devices are not disposable because they are mostly composed of non-renewable, non-biodegradable and sometimes toxic materials, causing serious damage to ecological systems when they are released to the environment. Here, we demonstrate an environment-friendly, disposable nonvolatile memory device composed of 99.3 vol.% nanocellulose. Our memory device consists of a nanocellulose-based resistive-switching layer and a nanopaper substrate. The device exhibited nonvolatile resistive switching with the capability of multilevel storage and potential scalability down to the single nanofiber level (ca. 15 nm). The biodegradability of our memory device was confirmed by burying it in natural soil for 26 days.

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Section: Introductionmentioning

confidence: 99%

All-nanocellulose nonvolatile resistive memory

et al. 2016

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“…However, iCVD is a versatile process enabling a solvent-induced damage free, pure, well-adhered, conformal, ultra-thin (<10 nm) coating353637. Furthermore, an all-dry polymerization process at room temperature allows thin film deposition on nearly all substrates, compared to previous reports depending on solution processing38394041. iCVD-grown polymer-based functional electronic devices have already been reported42.…”

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confidence: 99%

Foldable and Disposable Memory on Paper

Lee

Seong

et al. 2016

Sci Rep

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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.

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“…19,20 Individual singular nanofibers of cellulose exhibit low CTE, which is comparable to quartz glass, and an outstanding Young's modulus, which is higher than that of aluminum and glass fibers. 21,22 Although dense aggregates of cellulose nanofibers (CNFs) can form flexible, transparent films for electronic devices, [23][24][25][26] there currently are still substantial challenges to the practical application of CNF films, such as (i) incompatibility with high-temperature processing (o200°C), 27 (ii) optical haze (420% in visible light wavelengths) 28 derived from highly porous microstructures, (iii) poor water resistance (o28°in water contact angle), 26,29 (iv) difficulty in forming complex, fine shapes and (v) limits in mechanical stretchability. To the best of our knowledge, the potential of CNF to provide stretchable but reliable electronic devices is yet unexplored.…”

Section: Introductionmentioning

confidence: 99%

Photo-patternable and transparent films using cellulose nanofibers for stretchable origami electronics

Hyun

Kim

et al. 2016

NPG Asia Mater

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Substantial progress in flexible or stretchable electronics over the past decade has extensively impacted various technologies such as wearable devices, displays and automotive electronics for smart cars. An important challenge is the reliability of these deformable devices under thermal stress. Different coefficients of thermal expansion (CTE) between plastic substrates and the device components, which include multiple inorganic layers of metals or ceramics, induce thermal stress in the devices during fabrication processes or long-term operations with repetitions of thermal cyclic loading-unloading, leading to device failure and reliability degradation. Here, we report an unconventional approach to form photo-patternable, transparent cellulose nanofiber (CNF) hybrid films as flexible and stretchable substrates to improve device reliability using simultaneous electrospinning and spraying. The electrospun polymeric backbones and sprayed CNF fillers enable the resulting hybrid structure to be photolithographically patternable as a negative photoresist and thermally and mechanically stable, presenting outstanding optical transparency and low CTE. We also formed stretchable origami substrates using the CNF hybrid that are composed of rigid support fixtures and elastomeric joints, exploiting the photo-patternability. A demonstration of transparent organic light-emitting diodes and touchscreen panels on the hybrid film suggests its potential for use in next-generation electronics.

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Foldable Electrochromics Enabled by Nanopaper Transfer Method

Cited by 100 publications

References 58 publications

All-nanocellulose nonvolatile resistive memory

All-nanocellulose nonvolatile resistive memory

Foldable and Disposable Memory on Paper

Photo-patternable and transparent films using cellulose nanofibers for stretchable origami electronics

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