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Knot Architecture for Biocompatible and Semiconducting 2D Electronic Fiber Transistors

Lookup NU author(s): Dr Shayan SeyedinORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© 2024 The Authors. Small Methods published by Wiley-VCH GmbH. Wearable devices have generally been rigid due to their reliance on silicon-based technologies, while future wearables will utilize flexible components for example transistors within microprocessors to manage data. Two-dimensional (2D) semiconducting flakes have yet to be investigated in fiber transistors but can offer a route toward high-mobility, biocompatible, and flexible fiber-based devices. Here, the electrochemical exfoliation of semiconducting 2D flakes of tungsten diselenide (WSe2) and molybdenum disulfide (MoS2) is shown to achieve homogeneous coatings onto the surface of polyester fibers. The high aspect ratio (>100) of the flake yields aligned and conformal flake-to-flake junctions on polyester fibers enabling transistors with mobilities μ ≈1 cm2 V−1 s−1 and a current on/off ratio, Ion/Ioff ≈102–104. Furthermore, the cytotoxic effects of the MoS2 and WSe2 flakes with human keratinocyte cells are investigated and found to be biocompatible. As an additional step, a unique transistor ‘knot’ architecture is created by leveraging the fiber diameter to establish the length of the transistor channel, facilitating a route to scale down transistor channel dimensions (≈100 µm) and utilize it to make a MoS2 fiber transistor with a human hair that achieves mobilities as high as μ ≈15 cm2 V−1 s−1.


Publication metadata

Author(s): Carey T, Maughan J, Doolan L, Caffrey E, Garcia J, Liu S, Kaur H, Ilhan C, Seyedin S, Coleman JN

Publication type: Article

Publication status: Published

Journal: Small Methods

Year: 2024

Pages: ePub ahead of Print

Online publication date: 11/04/2024

Acceptance date: 26/03/2024

Date deposited: 17/04/2024

ISSN (electronic): 2366-9608

Publisher: Wiley-VCH GmbH

URL: https://doi.org/10.1002/smtd.202301654

DOI: 10.1002/smtd.202301654

Data Access Statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.


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Funding

Funder referenceFunder name
101030735
881603
AMBER
European Research Council (FUTURE-PRINT)
European Commission
Horizon Europe project 2DPRINTABLE
GOIPG/2020/1051
Marie Skłodowska-Curie Individual Fellowship
Irish Research Council
Ministry of Education of Turkey
SFI/12/RC/2278_P2
Science Foundation Ireland (SFI)

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