Wireless and battery-free radio-frequency(RF)sensors can be used to create physical spaces that ambiently sense and respond to human activities.Making such sensors ultra-flexible and transparent is important to preser...Wireless and battery-free radio-frequency(RF)sensors can be used to create physical spaces that ambiently sense and respond to human activities.Making such sensors ultra-flexible and transparent is important to preserve the aesthetics of living environments,accommodate daily activities,and functionally integrate with objects.However,existing RF sensors are unable to simultaneously achieve high transparency,flexibility,and the electrical conductivity required for remote room-scale operation.Here,we report 4.5μm RF tag sensors achieving transparency exceeding 90%that provide capabilities in room-scale ambient wireless sensing.We develop a laser-assisted water-based adhesion-reversion process to digitally realize computer-aided RF design at scale.By individually tagging multiple objects and regions of the human body,we demonstrate multiplexed wireless tracking of humanenvironment interactions and physiological signals at a range of up to 8m.These radio-frequency identification sensors open opportunities for non-intrusive wireless sensing of daily living spaces for applications in health monitoring and elderly care.展开更多
基金support from the National Institutes of Health(NIH)NIBIB Trailblazer Award(R21-EB029563)NIH R01 Award(R01-EB032959)+1 种基金Office of Naval Research Young Investigator Program Award(N00014-23-1-2391)CDMRP Discovery Award(HT9425-23-1-0041).
文摘Wireless and battery-free radio-frequency(RF)sensors can be used to create physical spaces that ambiently sense and respond to human activities.Making such sensors ultra-flexible and transparent is important to preserve the aesthetics of living environments,accommodate daily activities,and functionally integrate with objects.However,existing RF sensors are unable to simultaneously achieve high transparency,flexibility,and the electrical conductivity required for remote room-scale operation.Here,we report 4.5μm RF tag sensors achieving transparency exceeding 90%that provide capabilities in room-scale ambient wireless sensing.We develop a laser-assisted water-based adhesion-reversion process to digitally realize computer-aided RF design at scale.By individually tagging multiple objects and regions of the human body,we demonstrate multiplexed wireless tracking of humanenvironment interactions and physiological signals at a range of up to 8m.These radio-frequency identification sensors open opportunities for non-intrusive wireless sensing of daily living spaces for applications in health monitoring and elderly care.
