The implementation of an intelligent road network system requires many sensors for acquiring data from roads,bridges,and vehicles,thereby enabling comprehensive monitoring and regulation of road networks.Given this la...The implementation of an intelligent road network system requires many sensors for acquiring data from roads,bridges,and vehicles,thereby enabling comprehensive monitoring and regulation of road networks.Given this large number of required sensors,the sensors must be cost-effective,dependable,and environmentally friendly.Here,we show a laser upgrading strategy for coal tar,a low-value byproduct of coal distillation,to manufacture flexible strain-gauge sensors with maximum gauge factors of 15.20 and 254.17 for tension and compression respectively.Furthermore,we completely designed the supporting processes of sensor placement,data acquisition,processing,wireless communication,and information decoding to demonstrate the application of our sensors in traffic and bridge vibration monitoring.Our novel strategy of using lasers to upgrade coal tar for use as a sensor not only achieves the goal of turning waste into a resource but also provides an approach to satisfy large-scale application requirements for enabling intelligent road networks.展开更多
The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems.However,many of these systems are limited in either overall stretcha...The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems.However,many of these systems are limited in either overall stretchability or areal coverage of functional components.Here,we design a construct inspired by Kirigami for highly deformable microsupercapacitor patches with high areal coverages of electrode and electrolyte materials.These patches can be fabricated in simple and efficient steps by laser-assisted graphitic conversion and cutting.Because the Kirigami cuts significantly increase structural compliance,segments in the patches can buckle,rotate,bend and twist to accommodate large overall deformations with only a small strain(<3%)in active electrode areas.Electrochemical testing results have proved that electrical and electrochemical performances are preserved under large deformation,with less than 2%change in capacitance when the patch is elongated to 382.5%of its initial length.The high design flexibility can enable various types of electrical connections among an array of supercapacitors residing in one patch,by using different Kirigami designs.展开更多
基金supported by the National Key Research and Development Program of China(number 2022YFB4100900)the National Natural Science Foundation of China(number 52105459)+1 种基金the Tsinghua University Initiative Scientific Research Programthe Tsinghua University Start-up Funding.
文摘The implementation of an intelligent road network system requires many sensors for acquiring data from roads,bridges,and vehicles,thereby enabling comprehensive monitoring and regulation of road networks.Given this large number of required sensors,the sensors must be cost-effective,dependable,and environmentally friendly.Here,we show a laser upgrading strategy for coal tar,a low-value byproduct of coal distillation,to manufacture flexible strain-gauge sensors with maximum gauge factors of 15.20 and 254.17 for tension and compression respectively.Furthermore,we completely designed the supporting processes of sensor placement,data acquisition,processing,wireless communication,and information decoding to demonstrate the application of our sensors in traffic and bridge vibration monitoring.Our novel strategy of using lasers to upgrade coal tar for use as a sensor not only achieves the goal of turning waste into a resource but also provides an approach to satisfy large-scale application requirements for enabling intelligent road networks.
基金This work is supported in part by Berkeley Sensor and Actuator Center.
文摘The recent developments in material sciences and rational structural designs have advanced the field of compliant and deformable electronics systems.However,many of these systems are limited in either overall stretchability or areal coverage of functional components.Here,we design a construct inspired by Kirigami for highly deformable microsupercapacitor patches with high areal coverages of electrode and electrolyte materials.These patches can be fabricated in simple and efficient steps by laser-assisted graphitic conversion and cutting.Because the Kirigami cuts significantly increase structural compliance,segments in the patches can buckle,rotate,bend and twist to accommodate large overall deformations with only a small strain(<3%)in active electrode areas.Electrochemical testing results have proved that electrical and electrochemical performances are preserved under large deformation,with less than 2%change in capacitance when the patch is elongated to 382.5%of its initial length.The high design flexibility can enable various types of electrical connections among an array of supercapacitors residing in one patch,by using different Kirigami designs.
