Long-term epidermal monitoring with wearable electronics is often hindered on hairy skin due to hair regrowth,which disrupts the skin-device interface and can damage the device.Here,we introduce a high-precision micro...Long-term epidermal monitoring with wearable electronics is often hindered on hairy skin due to hair regrowth,which disrupts the skin-device interface and can damage the device.Here,we introduce a high-precision microfiber epidermal thermometer(MET)designed for deformation-insensitive,durable,reliable performance on hairy skin.MET utilizes a stretchable fiber(~340µm diameter),smaller than average hair follicle spacing,enabling conformal contact without interference from growing hair.Localized nanofiber reinforcement on a microfiber and temperature-sensing layer on localized region create a strain-engineered architecture,allowing MET to achieve strain-insensitive temperature detection.MET demonstrates stable operation under repeated strains(up to 55%)and delivers exceptional precision,with a temperature resolution of 0.01℃,even during body movements.It accurately tracks physiological temperature fluctuations and provides consistent measurements over 26 days of continuous wear,remaining unaffected by hair regrowth or motion.These results highlight MET as a robust platform for long-term temperature monitoring on hairy skin.展开更多
基金support by the National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIT)(Grant No.RS-2023-00208702)support from the National Research Foundation of Korea(NRF)funded by the Korean government(MIST)(RS-2024-00338686)。
文摘Long-term epidermal monitoring with wearable electronics is often hindered on hairy skin due to hair regrowth,which disrupts the skin-device interface and can damage the device.Here,we introduce a high-precision microfiber epidermal thermometer(MET)designed for deformation-insensitive,durable,reliable performance on hairy skin.MET utilizes a stretchable fiber(~340µm diameter),smaller than average hair follicle spacing,enabling conformal contact without interference from growing hair.Localized nanofiber reinforcement on a microfiber and temperature-sensing layer on localized region create a strain-engineered architecture,allowing MET to achieve strain-insensitive temperature detection.MET demonstrates stable operation under repeated strains(up to 55%)and delivers exceptional precision,with a temperature resolution of 0.01℃,even during body movements.It accurately tracks physiological temperature fluctuations and provides consistent measurements over 26 days of continuous wear,remaining unaffected by hair regrowth or motion.These results highlight MET as a robust platform for long-term temperature monitoring on hairy skin.
