The effective acquisition of clean water from atmospheric water offers a potential sustainable solution for increasing global water and energy shortages. In this study, an asymmetric amphiphilic surface incorporating self-driven triboelectric adsorption was developed to obtain clean water from the atmosphere. Inspired by cactus spines and beetle elytra, the asymmetric amphiphilic surface was constructed by synthesizing amphiphilic cellulose ester coatings followed by coating on laser-engraved spines of fluorinated ethylene propylene. Notably, the spontaneous interfacial triboelectric charge between the droplet and the collector was exploited for electrostatic adsorption. Additionally, the droplet triboelectric nanogenerator converts the mechanical energy generated by droplets falling into electrical energy through the volume effect, achieving an excellent output performance, and further enhancing the electrostatic adsorption by means of external charges, which achieved a water harvesting efficiency of 93.18 kg/m2 h. This strategy provides insights for the design of water harvesting system.
Tactile sensors with visible light feedback functions, such as wearable displays and electronic skin and biomedical devices, are becoming increasingly important in various fields. However, existing methods cannot meet the application requirements for the tactile perception of intensity feedback and extended intersection due to their limited light‐mapping performance and insufficient portability. Herein, a freely constructible self‐powered visual tactile sensor is proposed, which consists of a high‐output triboelectric nanogenerator (TENG) and a visual light source. The transferred charge of the TENG is enhanced to 746 nC by the structural design of the triboelectric material and device, which can easily drive the light source to generate a light signal with a brightness of 9.8 cd m−2. Notably, the application of the TENG enables to realization visual sensing of the palm‐grasp state and strength feedback without an external power supply. This visual feedback and power‐free tactile sensors are expected to have potential application in the field of artificial intelligence as a new interactive medium for smart protective clothing and robotics.
advanced materials with natural hierarchical structures have attracted considerable attention from researchers. [18][19][20][21][22][23][24] As an inexhaustible and sustainable resource, biomass materials show advantages in the development of highperformance structural materials due to their special hierarchical and porous structure. [25][26][27][28][29] The highly ordered hierarchical structure provides strong mechanical support for plant growth and promotes the vertical transportation of nutrients. The natural pore structure provides a channel for the exchange of material between adjacent cells and improves the energy storage efficiency of plants. [30,31] Inspired by this interesting organizational structure, researchers have developed composite advanced materials based on natural cellulose scaffolds, which is attracting attention in many fields such as energy storage, smart wearable electronics, [32][33][34] especially in the field of distributed micro-nano energy harvesting due to its special structure and excellent performance. [31,35] However, most bio-based composite materials still suffer from high-temperature decomposition, low-temperature brittleness, and even material decomposition, which severely limits their expansion and application in polar exploration, aerospace, and other extreme conditions. Therefore, it is still a great challenge to develop triboelectric functional materials with high efficiency, environmental stability, and rich sensing types.Compared with other biomass materials, bamboo, as a natural composite material, has a special functional gradient, in which the main components include lignin and cellulose. [36] In bamboo, fiber cells with various orientations composed of cellulose transport sufficient nutrients for the growth of lignin, while lignin provides adhesion and physical defense for the growth of fiber cells. Inspired by the "mutual benefit and winwin" model of natural bamboo, this research reports a simple and mild "three-step" strategy to the in situ growth of polyaniline (PANI) in bulk bamboo-derived cellulose scaffolds to construct hierarchical porous Bamboo/PANI triboelectric materials (BPTM) with continuous conductive pathways. The hierarchical porous cellulose scaffold constructed in this work enables abundant nucleation sites for the growth of PANI without complicated processes. Additionally, the hierarchical porous structure derived from natural bamboo allows the triboelectric charge to be distributed not only on the contact surface but also Synthetic polymer materials such as paraformaldehyde and polyamides are widely used in the field of energy engineering. However, they pose a challenge to environmental sustainability because they are derived from petrochemicals that are non-renewable and difficult to degrade in the natural environment. The development of high-performance natural alternatives is clearly emerging as a promising mitigation option. Inspired by natural bamboo, this research reports a "three-step" strategy for the large-scale production of triboelectric ...
Triboelectric probes have rapidly developed as an efficient tool for understanding contact electrification at liquid–solid interfaces. However, the liquid–solid electrification process is susceptible to interference from chemical components in mixed solutions, severely limiting the potential applications of triboelectric probes in various liquid environments. This study for the first time reports a triboelectric probe capable of sucrose solution concentration sensing, finding that the dissolution of sucrose destroys the hydrogen bond network between water molecules and forms sucrose–water hydrogen bonds, which alters the fluid mechanics characteristics of the solution and enhances its conductivity, thereby reducing the droplet size and causing an ion charge shielding effect that significantly affects the electron transfer in liquid–solid contact electrification. Owing to the feedback of the triboelectric probe on the sucrose concentration gradient‐type sensing electrical signals, efficient sensing of sucrose solution was achieved (sensitivity of −0.0038%−1, response time of 90 ms). The triboelectric probe is also used as a wireless smart terminal to enable real‐time detection of sucrose solution. This work contributes to the understanding of the structure–function relationship between micro hydrogen bonding and macro performance, and provides a promising solution for building sustainable intelligent sensors.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.