Showing Spotlights 1 - 8 of 28 in category All (newest first):
In order to realize practical device applications of stretchable strain sensors, stability without sacrificing sensitivity, stretchability, and scalability is crucial. To that end, researchers report a kirigami-structured graphene-polymer hybrid nanocomposite for strain sensors by a laser direct writing technique on a polyimide sheet. The approach of laser direct writing not only contributes to the conversion of polyimide material into conductively porous carbonized film, but also gives rise to the formation of kirigami-shaped structures with highly stretchable capability in a fast and efficient manner.
Mar 23rd, 2021
Skin-interfaced, wearable electronics have attracted significant attention due to their unique roles in preventative monitoring, diagnostic confirmation, and convenient therapeutic options. The ultimate application of these bio-integrated devices for practical and convenient applications hinges on the seamless integration of on-body sensors with wireless transmission modules. As a promising direction toward this class of integrated systems, soft body area sensor networks include on-body sensors for physiological signal monitoring and flexible printed circuit boards for signal conditioning/readout and wireless transmission.
Sep 15th, 2020
Researchers report the direct writing of laser-induced graphene on a Kevlar textile. The transformation of Kevlar into graphene can be attributed to the photothermal effect induced by CO2 laser irradiation. Specifically, this resulted in high localized temperature, leading to the ablation and depolymerization of the Kevlar fiber. The remaining carbon atoms are recombined and 'recrystallized' into graphene. Based on this technique, it becomes feasible to prepare various types of flexible electronics on different commercial textiles such as silk and cotton. This will enable the efficient and customized preparation of multi-functional textile electronics.
Mar 11th, 2020
MXenes' inherently good conductivity and excellent volumetric capacitance makes them a very attractive material for fabricating textile-based, wearable electronics (e-textiles) that can be worn like everyday garments. This requires the fabrication of conductive yarns that are robust enough to be suitable for the wear and tear experienced by everyday textiles. A new study demonstrates highly conductive MXene-based yarns that can be washed and knitted just like conventional yarns - offering a potential platform technology for e-textile-based devices with tunable performance.
Sep 11th, 2019
Researchers demonstrate the feasibility of an environmental moisture-induced, self-powered wearable multifunctional sensing system with the ability to detect both humidity and pressure. The self-powered wearable sensing system is fabricated by integrating a flexible micropatterned pressure-sensitive film on PET as the pressure sensor and attached it onto the back of a PDA power generator. Test results prove that this moisture-powered sensor can stably and sensitively realize real-time human physiological signal detection.
Aug 12th, 2019
Researchers have fabricated textiles that can protect you from rain, stains, and bacteria, while they harvest the biomechanical energy of the user to power textile-based electronics. These omniphobic triboelectric nanogenerators can be incorporated into any fiber-based textile and be used to power wearable devices using energy harvested from human motion. The team also designed their nanogenerators with large-scale fabrication runs in mind, using embroidery as a technique compatible with conventional textile manufacturing techniques.
Jul 31st, 2019
To realize the commercial potential of graphene, for instance for wearable electronics, it is necessary to develop reliable, cost-effective and facile processes for the industry-scale fabrication of graphene-based devices. A novel solution involves the synthesis of high-performance stretchable graphene ink using a facile, scalable, and low-cost laser induction method for the synthesis of the graphene component. This also is the first example of using laser-induced graphene in the form for a powder preparation of graphene-based inks and subsequently for use in screen-printing of stretchable micro-supercapacitors.
Jun 14th, 2019
Researchers have developed a comprehensive approach involving simple and facile steps to fabricate a wearable energy storage device based on carbon nanotube coated cotton yarn. All device components are flexible. According to the team, this is the first device that has been proven to be stable under rigorous washing conditions in the presence of hot water, detergents and high torque (spinning action of washing machine). This provides the device with comprehensive mechanical stability.
May 15th, 2019