Lightweight and Strong Cellulosic Triboelectric Materials Enabled by Cell Wall Nanoengineering

Abstract

As intelligent technology surges forward, wearable electronics have emerged as versatile tools for monitoring health and sensing our surroundings. Among these advancements, porous triboelectric materials have garnered significant attention for their lightness. However, these materials face the challenge of improving structural stability to further enhance the sensing accuracy of triboelectric sensors. In this study, a lightweight and strong porous cellulosic triboelectric material is designed by cell wall nanoengineering. By tailoring of the cell wall structure, the material shows a high mechanical strength of 51.8 MPa. The self-powered sensor constructed by this material has a high sensitivity of 33.61 kPa −1 , a fast response time of 36 ms, and excellent pressure detection durability. Notably, the sensor still enables a high sensing performance after the porous cellulosic triboelectric material exposure to 200 °C and achieves real-time feedback of human motion, thereby demonstrating great potential in the field of wearable electronic devices.

Reduced Graphene Oxide Interlocked Carbonized Loofah for Energy Harvesting and Physiological Signal Monitoring

“…Using the facile preparation method, rGO nanosheets can easily bind to the surfaces of CL through π–π interaction . The 2D rGO nanosheets can interconnect the distinct fibers of the loofah and serve as bridges to decrease the gap in electron transfer, ultimately resulting in accelerated electron transport. , The carbonization process is critical in order to achieve the necessary electrical conductivity and flexibility characteristics in wearable electronic devices. Figure b illustrates that CL@rGO maintains well-preserved network structures with no apparent disruptions.…”

Smart Lanceolate Surface with Fast Fog-Digesting Performance for Triboelectric Energy Harvesting

“…Water harbors significant energy reserves in diverse forms, serving as a sustainable energy reservoir. − Hydropower, for instance, generates approximately 16% of the world’s total annual electricity, playing an indispensable role in communication, industrial production, transportation, and other sectors. − However, traditional hydropower relies on rivers and waves to provide potential energy, is heavily dependent on topography and water resources, and is expensive to build, − making it unsuitable for arid and remote areas without surface water. Fog, an alternate manifestation of water, pervades the atmosphere extensively yet remains an underutilized natural asset. , Harnessing energy from fogwater presents substantial advantages.…”

An Ionic Assisted Enhancement Strategy Enabled High Performance Flexible Pressure–Temperature Dual Sensor

“…High-performance flexible and wearable pressure sensors show vast applicable prospects in ionic skin, human–computer interactions, biophysical monitoring, etc., − and the demand for them is increasing. To date, many studies have focused on flexible pressure sensors by utilizing piezoresistive, piezoelectric, triboelectric, piezo-transmittance, and capactive mechanisms. − Among these types, the capacitive-based pressure sensor has been widely studied due to the diverse advantages, for instance, a facile fabrication process, fast response speed, and high sensitivity. − …”