Projects per year
Abstract
Skin-compatible printed stretchable conductors that combine a low gauge factor with a high durability over many strain cycles are still a great challenge. Here, a graphene nanoplatelet-based colloidal ink utilizing a skin-compatible thermoplastic polyurethane (TPU) binder with adjustable rheology is developed. Stretchable conductors that remain conductive even under 100% strain and demonstrate high fatigue resistance to cyclic strains of 20-50% are realized via printing on TPU. The sheet resistances of these conductors after drying at 120 °C are as low as 34 Ω □-1 mil-1. Furthermore, photonic annealing at several energy levels is used to decrease the sheet resistance to <10 Ω □-1 mil-1, with stretchability and fatigue resistance being preserved and tunable. The high conductivity, stretchability, and cyclic stability of printed tracks having excellent feature definition in combination with scalable ink production and adjustable rheology bring the high-volume manufacturing of stretchable wearables into scope.
Original language | English |
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Pages (from-to) | 8031-8042 |
Journal | Chemistry of Materials |
Volume | 34 |
Issue number | 17 |
DOIs | |
Publication status | Published - 13 Sept 2022 |
MoE publication type | A1 Journal article-refereed |
Funding
The authors acknowledge funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement 881603 (Graphene Flagship Core3), 785219 (Graphene Flagship Core2) and 696656 (Graphene Flagship Core1).
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Dive into the research topics of 'Printed Stretchable Graphene Conductors for Wearable Technology'. Together they form a unique fingerprint.Projects
- 4 Finished
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GrapheneCore3: Graphene Flagship Core Project 3
Sandberg, H. (Manager), Arpiainen, S. (PI), Smolander, M. (Participant), Soikkeli, M. (Participant) & Ruotsalainen, T. (Participant)
1/04/20 → 30/09/23
Project: EU project
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GrapheneCore2: Graphene Flagship Core Project 2
Sandberg, H. (PI), Arpiainen, S. (Manager), Smolander, M. (Participant), Soikkeli, M. (Participant) & Ruotsalainen, T. (Participant)
1/04/18 → 31/03/20
Project: EU project
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GrapheneCore1: Graphene-based disruptive technologies
Sandberg, H. (PI) & Arpiainen, S. (Manager)
1/04/16 → 31/03/18
Project: EU project