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Composites based on carbon nanotubes (CNTs) are promising patternable materials that can be engineered to incorporate the outstanding properties of CNTs into various applications via printing technologies. However, conventional printing methods for CNTs require further improvement to overcome the major drawbacks that limit the patterning resolution and target substrate. Herein, an intaglio contact...
Device Miniaturization
Intaglio contact printing enables the realization of highly precise carbon nanotube (CNT) network patterns exhibiting multi‐functionalities without restrictions on the substrate. In article number 2106174, Soonmin Seo, Yoon‐Kyu Song, Ju‐Hyung Kim, and co‐workers present this method for the fabrication and miniaturization of high‐performance devices, including flexible fringe‐effect...
Fish‐Wearable Data Snooping Platform
In article number 2107232, Xiangyu Chen and co‐workers report a fish‐wearable data snooping platform (FDSP) based on an air sac triboelectric nanogenerator, which is integrated with multiple functions of disinfection, mechanical energy harvesting, real‐time monitoring and wireless data transmission. The FDSP offers an alternative for studying fish kinematics and...
Conventional approaches to studying fish kinematics pose a great challenge for the real‐time monitoring of fish motion kinematics. Here, a multifunctional fish‐wearable data snooping platform (FDSP) for studying fish kinematics is demonstrated based on an air sac triboelectric nanogenerator (AS‐TENG) with antibacterial coating. The AS‐TENG not only can harvest energy from fish swimming but also serves...
With the rapid development of human–machine interfaces, artificial acoustic sensors play an important role in the hearing impaired. Here, an ultrathin eardrum‐like triboelectric acoustic sensor (ETAS) is presented consisting of silver‐coated nanofibers, whose thickness is only 40 µm. The sensitivity and frequency response range of the ETAS are closely related to the geometric parameters. The ETAS...
Mechano‐Nociceptor Systems
In article number 2200185, Ye Zhou and co‐workers develop a diffusive memristor with better behaviors of conductive filaments and higher device uniformity based on 2D h‐BN, which could be used as an artificial nociceptor to mimic biological nociceptor properties. Moreover, a self‐powered mechano‐nociceptor is demonstrated by connecting a self‐made triboelectric nanogenerator...
The switching variability caused by intrinsic stochasticity of the ionic/atomic motions during the conductive filaments (CFs) formation process largely limits the applications of diffusive memristors (DMs), including artificial neurons, neuromorphic computing and artificial sensory systems. In this study, a DM device with improved device uniformity based on well‐crystallized two‐dimensional (2D) h...
Triboelectric nanogenerators (TENGs) are one of the most trending energy harvesting devices because of their efficient and simple mechanism in harvesting mechanical energy from the environment into electricity. Herein, ferroelectric and dielectric bismuth tungstate (Bi2WO6 (BWO)) with a marigold flower‐like structure is prepared via a hydrothermal method, which is embedded in poly(vinylidene fluoride‐co‐hexafluoropropylene)...
Although biomaterial‐based triboelectric nanogenerators (Bio‐TENGs) for use in wearable electronics and implantable sensors have been developed, power generation is not suitable for satisfying the basic requirements for practical applications. Here, to greatly enhance output performances of Bio‐TENG devices, an antagonistic approach of diatom frustules (DFs) with amine and fluorine chemical functionalizations...
As an emerging energy‐harvesting technology, the triboelectric nanogenerator (TENG) is considered a powerful driving force toward the new‐era of Internet of Things and artificial intelligence, but its output performance is dramatically influenced by environmental humidity. Herein, a direct current TENG (DC‐TENG) based on the triboelectrification effect and electrostatic breakdown is reported to address...
Non‐contact mode triboelectric nanogenerators effectively avoid physical contact between two triboelectric materials and achieve long‐term reliable operation, providing broad application prospects in the field of self‐powered sensing. However, the low surface charge density of triboelectric materials restricts application of contactless sensing. Herein, by controlling Rayleigh Instability deformation...
Magnetic energy is an abundant and persistent form of energy radiating from various sources. Here, a hybrid triboelectric‐electromagnetic magnetic energy harvester (HMEH) system consisting of a modified pendulum unit is proposed, interacting mechanically with two multilayered TENGs and remotely with Cu coils. Systematic studies are conducted on magneto‐mechano‐energy conversion from power transmission...
An encouraging micro‐energy harvesting technology, the triboelectric nanogenerator (TENG), has been proven to transfer ambient environmental micro‐energy into electricity, but a low surface charge density results in low performance and limits the practical application of TENG. Here, a ferromagnetic‐based charge‐accumulation TENG (FC–TENG) is proposed with ultrahigh surface charge density and performances...
Multiscale polymer engineering, involving chemical modification to control their triboelectric polarities as well as physicomechanical modification to maximize charge transfer and structural durability, is paramount to developing a high‐performance triboelectric nanogenerator (TENG). This report introduces a highly efficient and comprehensive strategy to engineer high‐performance TENG based on multifunctional...
An all‐fibrous large‐area (20 × 50 cm2) tailorable triboelectric nanogenerator (LT‐TENG) is prepared using a one‐step solution blow spinning technology, which has the advantages of easy operation, scale‐up in the area, and high production efficiency. The prepared LT‐TENG is composed of polyvinylidene fluoride (PVDF)/MXene (Ti3C2Tx) nanofibers (NFs) and conductive textile. Benefiting from the fibrous...
The portable power bank as an energy storage device has received tremendous attention while the limited capacity and periodical charging are critical issues. Here, a self‐charging power system (SCPS) consisting of a 0.94(Bi0.5Na0.5)TiO3–0.06Ba(Zr0.25Ti0.75)O3/polyvinylidenefluoride (BNT–BZT/PVDF) composite film‐based triboelectric nanogenerator (TENG) is designed as a wind energy harvester and an...
Triboelectric nanogenerators (TENGs) have intrigued scientists for their potential to alleviate the energy shortage crisis and facilitate self‐powered sensors. Triboelectric interfaces containing triboelectric functionalized molecular groups and tunable surface charge densities are important for improving the electrical output capability of TENGs and the versatility of future electronics. In this...
Widely distributed across the environment, irregular micro‐nano mechanical high entropy energy (HEE) is a new promising recoverable energy, in which the development of matched harvesting technology is imperative to fit in with the requirements of booming sustainable energy in the new era. The triboelectric nanogenerator (TENG) is a very efficient technology for harvesting micro‐nano HEE, especially...
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