Smart touchless human–machine interaction based on crystalline porous cages

Jinrong Wang, Weibin Lin, Zhuo Chen, Valeriia O. Nikolaeva, Lukman O. Alimi and Niveen M. Khashab ()
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Jinrong Wang: King Abdullah University of Science and Technology (KAUST)
Weibin Lin: King Abdullah University of Science and Technology (KAUST)
Zhuo Chen: King Abdullah University of Science and Technology (KAUST)
Valeriia O. Nikolaeva: King Abdullah University of Science and Technology (KAUST)
Lukman O. Alimi: King Abdullah University of Science and Technology (KAUST)
Niveen M. Khashab: King Abdullah University of Science and Technology (KAUST)

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract The rise of touchless technology, driven by the recent pandemic, has transformed human-machine interaction (HMI). Projections indicate a substantial growth in the touchless technology market, nearly tripling from $13.6 billion in 2021 to an estimated $37.6 billion by 2026. In response to the pandemic-driven shift towards touchless technology, here we show an organic cage-based humidity sensor with remarkable humidity responsiveness, forming the basis for advanced touchless platforms in potential future HMI systems. This cage sensor boasts an ultrafast response/recovery time (1 s/3 s) and exceptional stability (over 800 cycles) across relative humidity (RH) changes from 11% to 95%. The crystal structure’s 3D pore network and luxuriant water-absorbing functional groups both inside and outside of the cage contribute synergistically to superior humidity sensing. Demonstrating versatility, we showcase this cage in smart touchless control screens and touchless password managers, presenting cost-effective and easily processable applications of molecularly porous materials in touchless HMI.

Date: 2024
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DOI: 10.1038/s41467-024-46071-8

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