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/PRNewswire/ Macronix International Co., Ltd. (TSE: 2337), a leading integrated-device manufacturer of non-volatile memory (NVM) solutions, today announced. ....
Flexible wearable wireless devices have found practical uses as their cost has fallen and Internet of Things applications have gained further acceptance. These devices are gaining further use and acceptance in the consumer and wearable space for applications such as logistical tracking and maintaining sensor information, including temperature, humidity, and location. In such applications, antennas are exposed to bending and crumbling. Therefore, flexible substrate antennas for use with polymer-based flexible devices are an important area of research that needs to be addressed. In this study, the bending capabilities of flexible polymer substrate antennas for general IoT applications were practically analyzed by fabricating flexible antennas on Polyethylene Terephthalate (PET), Polytetrafluoroethylene (PTFE) Teflon, and Polyvinylchloride (PVC) substrates operating at 2.45, 4.45, and 7.25 GHz frequencies. The basic premise was to investigate the flexibility and bending ability of polymer ....
Thought LeadersDr. Massood AtashbarProfessor, Department of Electrical and Computer Engineering, Director, the Center for Advanced Smart Sensors and Structures (CASSS)Western Michigan University AZoSensors speaks with a team from the Center for Advanced Smart Sensors and Structures (CASSS) at Western Michigan University, led by Dr. Massood Atashbar. The team has developed a new specially designed pressure-sensitive cap that can help protect athletes from serious head injuries.
Can you give our readers a summary of the research carried out by your team at Western Michigan University? Our team is a part of the Center for Advanced Smart Sensors and Structures (CASSS) at Western Michigan University. We are a group of researchers with an interdisciplinary background working under the guidance of Dr. Massood Atashbar, a Professor in the Electrical and Computer Engineering department. ....
Abstract The fabrication of highly durable, flexible, all-solid-state supercapacitors (ASCs) remains challenging because of the unavoidable mechanical stress that such devices are subjected to in wearable applications. Natural/artificial fiber textiles are regarded as prospective materials for flexible ASCs due to their outstanding physicochemical properties. Here, a high-performance ASC is designed by employing graphene-encapsulated polyester fiber loaded with polyaniline as the flexible electrodes and bacterial cellulose (BC) nanofiber-reinforced polyacrylamide as the hydrogel electrolyte. The ASC combines the textile electrode capable of arbitrary deformation with the BC-reinforced hydrogel with high ionic conductivity (125 mS cm ), high tensile strength (330 kPa), and superelasticity (stretchability up to ≈1300%), giving rise to a device with high stability/compatibility between the electrodes and electrolyte that is compliant with flexible electronics. As a result, this ....
Abstract Flexible substrates have become essential in order to provide increased flexibility in wearable sensors, including polymers, plastic, paper, textiles and fabrics. This study is to comprehen-sively summarize the bending capabilities of flexible polymer substrate for general Internet of Things (IoTs) applications. The basic premise is to investigate the flexibility and bending ability of polymer materials as well as their tendency to withstand deformation. We start by providing a chronological order of flexible materials which have been used during the last few decades. In the future, the IoT is expected to support a diverse set of technologies to enable new applications through wireless connectivity. For wearable IoTs, flexibility and bending capabilities of materials are required. This paper provides an overview of some abundantly used polymer substrates and compares their physical, electrical and mechanical properties. It also studies the bending effects on the radia ....