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Wearable solid-state capacitors based on two-dimensional material all-textile heterostructures

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Abstract

Two-dimensional (2D) materials are a rapidly growing area of interest for wearable electronics, due to their flexible and unique electrical properties. All-textile-based wearable electronic components are key to enable future wearable electronics. Single component electrical elements have been demonstrated; however heterostructure-based assemblies, combining electrically conductive and dielectric textiles such as all-textile capacitors are currently missing. Here we demonstrate a superhydrophobic conducting fabric with a sheet resistance Rs ∼ 2.16 kΩ □−1, and a pinhole-free dielectric fabric with a relative permittivity εr ∼ 2.35 enabled by graphene and hexagonal boron nitride inks, respectively. The different fabrics are then integrated to engineer the first example of an all-textile-based capacitive heterostructure with an effective capacitance C ∼ 26 pF cm−2 and a flexibility of ∼1 cm bending radius. The capacitor sustains 20 cycles of repeated washing and more than 100 cycles of repeated bending. Finally, an AC low-pass filter with a cut-off frequency of ∼15 kHz is integrated by combining the conductive polyester and the capacitor. These results pave the way toward all-textile vertically integrated electronic devices.

Graphical abstract: Wearable solid-state capacitors based on two-dimensional material all-textile heterostructures

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Publication details

The article was received on 15 Jan 2019, accepted on 16 Apr 2019 and first published on 18 Apr 2019


Article type: Paper
DOI: 10.1039/C9NR00463G
Nanoscale, 2019, Advance Article

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    Wearable solid-state capacitors based on two-dimensional material all-textile heterostructures

    S. Qiang, T. Carey, A. Arbab, W. Song, C. Wang and F. Torrisi, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR00463G

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