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Body area network has attracted extensive attention for its applications in athletics, medical, diagnosis, and rehabilitation training in the next generation personalized health care solutions. Here, a contact‐separation direct current triboelectric nanogenerators (CSDC‐TENGs) based self‐powered wireless body area network (SWBAN) is reported that enables multi‐joint movements monitoring for human motion. The CSDC‐TENG is designed as a flexible active sensor with an internal contact switch, and the flexible substrate makes the TENG‐sensor stick onto skin easily. Due to the internal switch, the CSDC‐TENG could generate a DC current, a large instantaneous output voltage exceeds 700 V, and an instantaneous power can reach 1.076 W, which is more than 23 000 times higher than that of the traditional contact‐separation mode TENG in same size and materials without the switch. By coupling with flexible coil, the fixed high‐frequency radio signals can be modulated and emitted clearly ranging from 6 to 16 MHz, which can be wirelessly received and demodulated through a reader. Moreover, the SWBAN is demonstrated in a real time monitoring system for joints motion. This work has realized the wearable TENG for self‐powered wireless real‐time monitoring of body movements driven by low‐frequency human daily activities, which may promote a tremendous development of intelligent healthcare, wireless sensing system and body area network. [ABSTRACT FROM AUTHOR]

Drug release devices of small molecules are widely used in cell stimulation, drug delivery, and microenvironment regulation. Herein, a flexible drug release device (FDRD) powered by a triboelectric nanogenerator (TENG) is demonstrated, that has the superiority of low power consumption, flexible structure, and controllable release. In the self‐powered FDRD, the TENG can effectively harvest and transfer biomechanical energy into electricity. With a power management module, the TENG can provide a steady voltage supply for sustainable drug release, and the unique switchable wettability of poly(3‐hexylthiophene) films in Na2SO4 aqueous solutions can be regulated. The UV–vis absorption spectra of small molecules including methylene blue, fluorescein sodium, and rhodamine 6G released from the FDRD can be observed and recorded in real time. Furthermore, the releasing rate of conventional salicylic acid with the effect of removing cutin, sterilizing, and diminishing inflammation is also recorded in Na2SO4 aqueous solution. With the advantages of flexible structure, and controllable and sustainable release, the self‐powered FDRD is expected to find great potential in wearable medical devices, drug controllable release, and self‐powered therapy. [ABSTRACT FROM AUTHOR]

Tribotronics has attracted great attention as a new research field that encompasses the control and tuning of semiconductor transport by triboelectricity. Here, tribotronics is reviewed in terms of active mechanosensation and human–machine interfacing. As a fundamental unit, contact electrification field‐effect transistors are analyzed, in which the triboelectric potential can be used to control electrical transport in semiconductors. Several tribotronic functional devices have been developed for active control and information sensing, which has demonstrated triboelectricity‐controlled electronics and established active mechanosensation for the external environment. In addition, the universal triboelectric power management strategy and the triboelectric nanogenerator‐based constant sources are also reviewed, in which triboelectricity can be managed by electronics in the reverse action. With the implantation of triboelectric power management modules, the harvested triboelectricity by various kinds of human kinetic and environmental mechanical energy can be effectively managed as a power supply for self‐powered microsystems. In terms of the research prospects for interactions between triboelectricity and semiconductors, tribotronics is expected to demonstrate significant impact and potential applications in micro‐electro‐mechanical systems/nano‐electro‐mechanical systems (MEMS/NEMS), flexible electronics, robotics, wireless sensor network, and Internet of Things. [ABSTRACT FROM AUTHOR]