We fabricated wearable perspiration analyzing sites for actively monitoring physiological status during exercises without any batteries or other power supply.The device mainly consists of ZnO nanowire(NW)arrays and fl...We fabricated wearable perspiration analyzing sites for actively monitoring physiological status during exercises without any batteries or other power supply.The device mainly consists of ZnO nanowire(NW)arrays and flexible polydimethylsiloxane substrate.Sweat on the skin can flow into the flow channels of the device through capillary action and flow along the channels to ZnO NWs.The sweat flowing on the NWs(with lactate oxidase modification)can output a DC electrical signal,and the outputting voltage is dependent on the lactate concentration in the sweat as the biosensing signal.ZnO NWs generate electric double layer(EDL)in sweat,which causes a potential difference between the upper and lower ends(hydrovoltaic effect).The product of the enzymatic reaction can adjust the EDL and influence the output.This device can be integrated with wireless transmitter and may have potential application in constructing sports big data.This work promotes the development of next generation of biosensors and expands the scope of self-powered physiological monitoring system.展开更多
A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy...A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy and mechanical energy through the water evaporation process, and the supercapacitor can be charged simultaneously. The former offers stable electrical power as output, whereas the Ppy- based supercapacitor shows a capacitance of 12.497 m F/cm^2 with 96.42% retention after 4,000 cycles. After filling the power unit with water as the fuel, it can be fully charged in about 20 min. The power unit can be flexibly integrated with electronic devices such as sensor nodes and wireless transmitters employ- ing the Internet of Things. This new approach can offer new possibilities in continuous future operation of randomly distributed electronic devices incorporated in the Internet of Things.展开更多
A new self-powered temperature-sensitive electronic-skin(e-skin) for real-time monitoring body temperature without external electricity power was fabricated from patterned polydimethylsiloxane/polyaniline(PDMS/PANI) n...A new self-powered temperature-sensitive electronic-skin(e-skin) for real-time monitoring body temperature without external electricity power was fabricated from patterned polydimethylsiloxane/polyaniline(PDMS/PANI) nanostructures. The e-skin can be feasibly attached on the human body and driven by the mechanical motion energy through triboelectric effect. The outputting triboelectric impulse of the PDMS/PANI units is significantly dependent on the local surface temperature of the eskin, serving as both the power source and temperature sensing signal. The outputting current of the e-skin increases with increasing surface temperature of the device. Under applied bending deformation,the response of the e-skin is up to 63.6 for 38.6℃. The e-skin can detect minimum temperature change of 0.4℃. The working mechanism can be ascribed to the coupling effect of triboelectric and semiconductor properties(tribotronic effect). A practical application of the e-skin attaching on the human body for detecting the body temperature range of 36.5–42.0℃ has been simply demonstrated. This work provides a viable method for real-time monitoring body temperature, and can promote the development of wearable temperature sensors and self-powered multifunctional nanosystems.展开更多
A new self-powered/self-cleaned atmosphere monitoring system has been fabricated from TiO_(2)nanoparticles through combining hydrovoltaic,gas sensing and photocatalytic effects.The TiO_(2)nanoparticle film can convert...A new self-powered/self-cleaned atmosphere monitoring system has been fabricated from TiO_(2)nanoparticles through combining hydrovoltaic,gas sensing and photocatalytic effects.The TiO_(2)nanoparticle film can convert natural thermal energy into electricity(hydrovoltaic effect)by the spontaneous water evaporation.The hydrovoltaic/gas-sensing coupling effect of TiO_(2)nanoparticle offers the waterevaporation-powered gas detection performance,and the outputting voltage/current has a good response to the surrounding gas atmosphere,directly acting as the gas sensing signal.The zeta potential of TiO_(2)is changed by the surface adsorption of gas molecules,and thus affects the electricity output of the system.The outputting electricity can directly power a wireless transmitter for transmitting the sensing information to external platform,and the whole system can work independently without electricity power supply.The rainwater can be used as the fuel of the system,and thus the system can be used outdoors without scheduled maintenance.Moreover,the photocatalytic activity of TiO_(2)can effectively degrade the organic pollutants on the film under photo illumination,leading to a self-clean behavior of the system.The system can probably promote the development of green sensing techniques with evaporation-induced ability.展开更多
基金supported by the National Natural Science Foundation of China(11674048)Sichuan Science and Technology Program(20JCQN0201).
文摘We fabricated wearable perspiration analyzing sites for actively monitoring physiological status during exercises without any batteries or other power supply.The device mainly consists of ZnO nanowire(NW)arrays and flexible polydimethylsiloxane substrate.Sweat on the skin can flow into the flow channels of the device through capillary action and flow along the channels to ZnO NWs.The sweat flowing on the NWs(with lactate oxidase modification)can output a DC electrical signal,and the outputting voltage is dependent on the lactate concentration in the sweat as the biosensing signal.ZnO NWs generate electric double layer(EDL)in sweat,which causes a potential difference between the upper and lower ends(hydrovoltaic effect).The product of the enzymatic reaction can adjust the EDL and influence the output.This device can be integrated with wireless transmitter and may have potential application in constructing sports big data.This work promotes the development of next generation of biosensors and expands the scope of self-powered physiological monitoring system.
基金supported by the National Natural Science Foundation of China(11674048)the Fundamental Research Funds for the Central Universities(N170505001,and N160502002)Program for Shenyang Youth Science and Technology Innovation Talents(RC170269)
文摘A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy and mechanical energy through the water evaporation process, and the supercapacitor can be charged simultaneously. The former offers stable electrical power as output, whereas the Ppy- based supercapacitor shows a capacitance of 12.497 m F/cm^2 with 96.42% retention after 4,000 cycles. After filling the power unit with water as the fuel, it can be fully charged in about 20 min. The power unit can be flexibly integrated with electronic devices such as sensor nodes and wireless transmitters employ- ing the Internet of Things. This new approach can offer new possibilities in continuous future operation of randomly distributed electronic devices incorporated in the Internet of Things.
基金supported by the National Natural Science Foundation of China (No. 11674048)
文摘A new self-powered temperature-sensitive electronic-skin(e-skin) for real-time monitoring body temperature without external electricity power was fabricated from patterned polydimethylsiloxane/polyaniline(PDMS/PANI) nanostructures. The e-skin can be feasibly attached on the human body and driven by the mechanical motion energy through triboelectric effect. The outputting triboelectric impulse of the PDMS/PANI units is significantly dependent on the local surface temperature of the eskin, serving as both the power source and temperature sensing signal. The outputting current of the e-skin increases with increasing surface temperature of the device. Under applied bending deformation,the response of the e-skin is up to 63.6 for 38.6℃. The e-skin can detect minimum temperature change of 0.4℃. The working mechanism can be ascribed to the coupling effect of triboelectric and semiconductor properties(tribotronic effect). A practical application of the e-skin attaching on the human body for detecting the body temperature range of 36.5–42.0℃ has been simply demonstrated. This work provides a viable method for real-time monitoring body temperature, and can promote the development of wearable temperature sensors and self-powered multifunctional nanosystems.
基金the National Natural Science Foundation of China(No.11674048)Sichuan Science and Technology Program(2020JDJQ0026)。
文摘A new self-powered/self-cleaned atmosphere monitoring system has been fabricated from TiO_(2)nanoparticles through combining hydrovoltaic,gas sensing and photocatalytic effects.The TiO_(2)nanoparticle film can convert natural thermal energy into electricity(hydrovoltaic effect)by the spontaneous water evaporation.The hydrovoltaic/gas-sensing coupling effect of TiO_(2)nanoparticle offers the waterevaporation-powered gas detection performance,and the outputting voltage/current has a good response to the surrounding gas atmosphere,directly acting as the gas sensing signal.The zeta potential of TiO_(2)is changed by the surface adsorption of gas molecules,and thus affects the electricity output of the system.The outputting electricity can directly power a wireless transmitter for transmitting the sensing information to external platform,and the whole system can work independently without electricity power supply.The rainwater can be used as the fuel of the system,and thus the system can be used outdoors without scheduled maintenance.Moreover,the photocatalytic activity of TiO_(2)can effectively degrade the organic pollutants on the film under photo illumination,leading to a self-clean behavior of the system.The system can probably promote the development of green sensing techniques with evaporation-induced ability.
