Self-powered sensing technologies are increasingly sought for intelligent and autonomous marine environmental monitoring.A Faraday cage-enabled triboelectric nanogenerator(FC-TENG)is developed by incorporating a FeCoC...Self-powered sensing technologies are increasingly sought for intelligent and autonomous marine environmental monitoring.A Faraday cage-enabled triboelectric nanogenerator(FC-TENG)is developed by incorporating a FeCoCrNiAl alloy powder layer,enabling efficient harvesting of low-frequency mechanical energy.The quasi-enclosed conductive architecture mimics a Faraday cage,effectively confining electrostatic charges and suppressing edge-induced dissipation,thereby enhancing charge retention.Compared to single-metal triboelectric layers,the FC-TENG exhibits 4.86-,3.57-,and 2.76-fold increases in open-circuit voltage(VOC,1276.27 V),short-circuit current(ISC,63.69μA),and transferred charge(QSC,29.55 nC),respectively.Its hydrophobic surface further ensures environmental robustness and stable output under humid conditions.With an optimized load resistance of 60 MΩ,the FC-TENG device achieves a peak power of~4.08 mW and reliably powers LED arrays and environmental sensors,while enabling efficient energy storage across a wide frequency range.Furthermore,a wave-driven FC-TENG system integrated with wireless communication and visual feedback modules enables real-time marine motion monitoring without external power.This work introduces the Faraday cage-inspired triboelectric device based on microspherical alloy powder,offering enhanced charge retention,humidity tolerance,and dual-mode functionality in power generation and marine wave sensing.The proposed strategy provides a robust and scalable architecture for future self-powered systems operating in harsh environments.展开更多
A new technique of designing a dual-band frequency selective surface with large band separation is presented.This technique is based on a delicately designed topology of L-and Ku-band microwave filters.The two band-pa...A new technique of designing a dual-band frequency selective surface with large band separation is presented.This technique is based on a delicately designed topology of L-and Ku-band microwave filters.The two band-pass responses are generated by a capacitively-loaded square-loop frequency selective surface and an aperture-coupled frequency selective surface,respectively.A Faraday cage is located between the two frequency selective surface structures to eliminate undesired couplings.Based on this technique,a dual-band frequency selective surface with large band separation is designed,which possesses large band separation,high selectivity,and stable performance under various incident angles and different polarizations.展开更多
基金supported by the Opening Fund of State Key Laboratory of Fire Science(SKLFS)under Grant No.HZ2024-KF04the Open Project Program of Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems(No.2024SZKF01)the New Chongqing Youth Innovation Talent Project(CSTB2024NSCQ-QCXMX0072).
文摘Self-powered sensing technologies are increasingly sought for intelligent and autonomous marine environmental monitoring.A Faraday cage-enabled triboelectric nanogenerator(FC-TENG)is developed by incorporating a FeCoCrNiAl alloy powder layer,enabling efficient harvesting of low-frequency mechanical energy.The quasi-enclosed conductive architecture mimics a Faraday cage,effectively confining electrostatic charges and suppressing edge-induced dissipation,thereby enhancing charge retention.Compared to single-metal triboelectric layers,the FC-TENG exhibits 4.86-,3.57-,and 2.76-fold increases in open-circuit voltage(VOC,1276.27 V),short-circuit current(ISC,63.69μA),and transferred charge(QSC,29.55 nC),respectively.Its hydrophobic surface further ensures environmental robustness and stable output under humid conditions.With an optimized load resistance of 60 MΩ,the FC-TENG device achieves a peak power of~4.08 mW and reliably powers LED arrays and environmental sensors,while enabling efficient energy storage across a wide frequency range.Furthermore,a wave-driven FC-TENG system integrated with wireless communication and visual feedback modules enables real-time marine motion monitoring without external power.This work introduces the Faraday cage-inspired triboelectric device based on microspherical alloy powder,offering enhanced charge retention,humidity tolerance,and dual-mode functionality in power generation and marine wave sensing.The proposed strategy provides a robust and scalable architecture for future self-powered systems operating in harsh environments.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.60871027,60901029 and 61071058)the National Basic Research Program of China(Grant No.2009CB623306)+2 种基金the Research Fund of Shaanxi Key Laboratory of Electronic Information System Integration,China(Grant No.201114Y11)the Postdoctoral Science Foundation of China(Grant No.20100481327)the Natural Science Foundation of Shaanxi Province,China(Grant No.2011JQ8031)
文摘A new technique of designing a dual-band frequency selective surface with large band separation is presented.This technique is based on a delicately designed topology of L-and Ku-band microwave filters.The two band-pass responses are generated by a capacitively-loaded square-loop frequency selective surface and an aperture-coupled frequency selective surface,respectively.A Faraday cage is located between the two frequency selective surface structures to eliminate undesired couplings.Based on this technique,a dual-band frequency selective surface with large band separation is designed,which possesses large band separation,high selectivity,and stable performance under various incident angles and different polarizations.
