Flexible tactile sensor has been extensively investigated as a key component for emerging electronics applications such as robotics,wearable devices,computer hardware,and security systems.Tactile sensors based on vari...Flexible tactile sensor has been extensively investigated as a key component for emerging electronics applications such as robotics,wearable devices,computer hardware,and security systems.Tactile sensors based on various one-dimensional materials have been widely explored.However,precise control of the direction and distribution of these nanomaterials remains a great challenge,and it has been difficult to scale down the device.Here,we introduce highly sensitive integrated flexible tactile sensors based on uniform phase-change Ge_(2)Sb_(2)Te_(5)(GST)thin films that can scale device size down,at least,to micrometer range.Significant piezoresistive effect has been observed in GST-based sensors,showing a giant gauge factor of 338.A proof of concept 5×5 sensor array functioning as a touch panel has been demonstrated.Also,the flexible GST tactile sensor has been utilized for monitoring of radial artery pulse.In addition to the well-known tunable electrical and optical properties,the piezoresistive GST films provide a versatile platform for the integration of sensing,recording,and displaying functions.展开更多
Electrical stimulation via invasive microelectrodes is commonly used to treat a wide range of neurological and psychiatric conditions.Despite its remarkable success,the stimulation performance is not sustainable since...Electrical stimulation via invasive microelectrodes is commonly used to treat a wide range of neurological and psychiatric conditions.Despite its remarkable success,the stimulation performance is not sustainable since the electrodes become encapsulated by gliosis due to foreign body reactions.Magnetic stimulation overcomes these limitations by eliminating the need for a metal-electrode contact.Here,we demonstrate a novel microfabricated solenoid inductor(80µm×40µm)with a magnetic core that can activate neuronal tissue.The characterization and proof-of-concept of the device raise the possibility that micromagnetic stimulation solenoids that are small enough to be implanted within the brain may prove to be an effective alternative to existing electrode-based stimulation devices for chronic neural interfacing applications.展开更多
基金The work was financially supported by W.M.Keck Foundation.
文摘Flexible tactile sensor has been extensively investigated as a key component for emerging electronics applications such as robotics,wearable devices,computer hardware,and security systems.Tactile sensors based on various one-dimensional materials have been widely explored.However,precise control of the direction and distribution of these nanomaterials remains a great challenge,and it has been difficult to scale down the device.Here,we introduce highly sensitive integrated flexible tactile sensors based on uniform phase-change Ge_(2)Sb_(2)Te_(5)(GST)thin films that can scale device size down,at least,to micrometer range.Significant piezoresistive effect has been observed in GST-based sensors,showing a giant gauge factor of 338.A proof of concept 5×5 sensor array functioning as a touch panel has been demonstrated.Also,the flexible GST tactile sensor has been utilized for monitoring of radial artery pulse.In addition to the well-known tunable electrical and optical properties,the piezoresistive GST films provide a versatile platform for the integration of sensing,recording,and displaying functions.
基金This work was supported by the National Science Foundation under ECCS1533484 and NIH NINDS(UF1NS107694)Diamond sample fabrication was performed at the Center for Nanoscale Systems(CNS)at Harvard University,a member of the National Nanotechnology Coordinated Infrastructurewhich is supported by the NSF under ECCS-1541959.
文摘Electrical stimulation via invasive microelectrodes is commonly used to treat a wide range of neurological and psychiatric conditions.Despite its remarkable success,the stimulation performance is not sustainable since the electrodes become encapsulated by gliosis due to foreign body reactions.Magnetic stimulation overcomes these limitations by eliminating the need for a metal-electrode contact.Here,we demonstrate a novel microfabricated solenoid inductor(80µm×40µm)with a magnetic core that can activate neuronal tissue.The characterization and proof-of-concept of the device raise the possibility that micromagnetic stimulation solenoids that are small enough to be implanted within the brain may prove to be an effective alternative to existing electrode-based stimulation devices for chronic neural interfacing applications.
