A flexible topo-optical sensing technology with ultra-high contrast

Cong Wang, Ding Wang, Valery Kozhevnikov, Xingyi Dai, Graeme Turnbull, Xue Chen, Jie Kong (), Ben Zhong Tang (), Yifan Li () and Ben Bin Xu ()
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Cong Wang: Northumbria University
Ding Wang: Northumbria University
Valery Kozhevnikov: Northumbria University
Xingyi Dai: Northwestern Polytechnical University
Graeme Turnbull: Northumbria University
Xue Chen: Northumbria University
Jie Kong: Northwestern Polytechnical University
Ben Zhong Tang: The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon
Yifan Li: Northumbria University
Ben Bin Xu: Northumbria University

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract Elastic folding, a phenomenon widely existing in nature, has attracted great interests to understand the math and physical science behind the topological transition on surface, thus can be used to create frontier engineering solutions. Here, we propose a topo-optical sensing strategy with ultra-high contrast by programming surface folds on targeted area with a thin optical indicator layer. A robust and precise signal generation can be achieved under mechanical compressive strains (>0.4). This approach bridges the gap in current mechano-responsive luminescence mechanism, by utilizing the unwanted oxygen quenching effect of Iridium-III (Ir-III) fluorophores to enable an ultra-high contrast signal. Moreover, this technology hosts a rich set of attractive features such as high strain sensing, encoded logic function, direct visualisation and good adaptivity to the local curvature, from which we hope it will enable new opportunities for designing next generation flexible/wearable devices.

Date: 2020
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DOI: 10.1038/s41467-020-15288-8

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