A Korean research team has developed a deep-ultraviolet (DUV) LED with an entirely new material. The DUV LED refers to a semiconductor light source designed to emit ultraviolet (UV) light with a short wavelength of 200 to 280 nanometers. Irradiating this LED on viruses or bacteria destroys harmful pathogens while minimizing harm to the human body. A POSTECH research team led by Professor Jonghwan Kim and Ph.D. candidates Su-Beom Song and Sangho Yoon (Department of Materials Science and Engineering) has produced DUV LED for the first time using hexagonal boron nitride (hBN). The team’s work was published in the journal Nature Communications. Unlike visible light, UV light can destroy or alter the form of a material. Among UV lights, the near-UV light has high penetration depth and can cause diseases when the skin is exposed to it. However, DUV light has extremely low skin penetrability and is anticipated to be safely used. For this reason, research to develop DUV LEDs has been active, mainly using aluminum gallium nitride (AlxGa1-xN). However, this material has a fundamental limitation in that its electroluminescence rapidly deteriorates as the wavelength becomes shorter and fabricating LEDs that can be used in the DUV frequencies remains a challenge. Hexagonal boron nitride (hBN) used by Professor Jonghwan Kim’s research team is a van der Waals (vdW) layered material like graphite. It is often called the ‘white graphene’ because its monolayer structure is s...

Diabetes is a long-term chronic disease with many complications and requires care over a lifetime. The longer a patient suffers from diabetes, the higher the risk of developing retinopathy which can progressively lead to a decline in vision and even to blindness. A POSTECH research team led by Professor Sei Kwang Hahn and Ph.D. candidate Geon-Hui Lee (Department of Materials Science and Engineering) in collaboration with Dr. Sangbaie Shin of PHI BIOMED Co. has recently developed a smart contact lens-type wearable device to prevent diabetic retinopathy and treat it in its early stages by irradiating 120 µW far-red/LED light to the retina. This technology for smart LED contact lens has attracted great attention for various ophthalmologic diseases. Diabetic retinopathy is currently treated by highly invasive repeated therapeutic injections to the eyeball or thousands of small burns made with a laser to destroy capillaries near the edges of the retina under anesthesia. Both procedures are considered highly painful for the patient. Through the study with diabetic animal models, the researchers confirmed that the diabetic retinopathy did not appear in animals that wore the smart contact lenses for 15 minutes 3 times a week for a total of 8 weeks. In contrast, the animals that did not wear the lenses showed retinopathic conditions. The safety and effectiveness of the lenses were also confirmed by the histological analysis of the cornea and retina. "This study has demonstrated ...

Company: Networking Break - Meet Speakers | Date: 9-10 Feb 2022 | Full Presentation Join TechBlick on an annual pass to join all live online conference or online version of onsite conference access library of on-demand talks (600 talks + PDFs) portfolio of expert led masterclass year-round platform https://www.techblick.com/ Our next battery-related event will take place on 15-16 FEB 2023, covering 1) Solid-State Batteries: Innovations, Promising Start-Ups, & Future Roadmap 2) Battery Materials: Next-Generation & Beyond Lithium Ion The speakers include: General Motors, Graphenix Development, Brookhaven National Laboratory, Fraunhofer IKTS, RWTH Aachen University, Lawrence Livermore National Laboratories, Meta Materials Inc, Skeleton Technologies, Solid State Battery Inc, Argonne National Laboratories, OneD Battery Sciences, VTT, Leyden Jar Technologies B.V., b-Science, Rho Motion, Wevo-Chemie, LiNA Energy, CNM Technologies, Ionblox, Empa, Zinc8 Energy Solutions, Avicenne Energy, Echiontech, South8 Technologies, Basquevolt, NanoXplore, Chasm, Li Metal, Sila Nanotechnologies, Quantumscape (tentative), Fraunhofer ISI, etc https://www.techblick.com/...

Speaker: Eric Forsythe | Company: U.S. Army Combat Capabilities Development Command| Date: 11-12 May 2021 | Full Presentation Bio Eric W. Forsythe, Ph.D is the Team Leader for Flexible Electronics at the US Army Research Laboratory, Adelphi, MD. His responsibilities include; the Program Manager for the Flexible Hybrid Electronics Manufacturing Innovation Institute. Recently, Dr Forsythe was the Deputy Program Manager for the U.S. Army’s Flexible Display Center that demonstrated the World’s Largest flexible organic ligtht emitting diode displays and most recently the World’s Largest flexible digital x-ray imagers for DOD Explosive Ordnance Disposal. Additional responsibilities include the co-PI with the human performancde team for the ARL initiaitive “Continuous, Real-Time Assessment of Soldiers:The Foundation for Future Individualized and Adaptive Technologies” and the ARL Directors Initiative entitle “Ultrafast Electron Spectrocopy” for unique materials science exploration. Prior to joining ARL in 2001, Dr Forsythe was a Research Associate at the University of Rochester where he worked on electronic interfaces in organic light emitting diodes (OLEDs) with Eastman Kodak, the inventors of the commercial OLED display technology. In 1996, Dr Forsythe received his Ph.D in Engineering Physics at Stevens Institute of Technology. He has spent time working at small businesses on SBIR-projects in wide range of technologies and at Kearfott Guidance and Navigation on the Trident Missile...

POSTECH-UNIST joint research team proposes a dynamic sensory system using artificial receptors that generate spike signals. The newly developed system enables real-time response that mimics real skin and achieves structural simplicity. We can pick up objects and take steady steps thanks to the tactility in our hands and feet. As such, skin acts as a channel that connects the external world or stimuli with the human body. When these sensory functions do not work properly, it becomes difficult to grasp or use objects, or in worse cases, fail to protect ourselves from dangerous external stimuli such as heat that can cause burns. Therefore, it is paramount for electric skin – being developed for artificial skin or humanoid robots – to be capable of reacting to the external environment in real time. A POSTECH research team led by Professor Unyong Jeong and Ph.D. candidate Taeyeong Kim (Department of Materials Science and Engineering) in collaboration with Professor Sung-Phil Kim and Ph.D. candidate Jaehun Kim (Department of Biomedical Engineering) at UNIST has developed an electronic skin that can sense tactility just as humans do. Conventional electronic skins could only process tactile information by sequential measurement of electric signals coming from the vast number of pixels configured in the sensor. Thus, densely packed pixels took much time to measure, rendering it difficult to create an electronic skin with a high spatial resolution that responds immediately to stimul...

For printed electronics with digital additive printing Advanced Metallization with Highly Conductive Ag, Au, and Pt Metal Complex Inks Problem: As the world of electronics continues to change shape - literally - and products become wearable, flexible, foldable and capable of processing data at the same time, the demand for the tiny circuitry making it all possible has hit a tipping point creating a need for new solutions. In addition, the drive for innovation and a secure supply chain in semiconductor packaging and biomedical devices is of core importance today. One of the most fundamental components and an emerging lever for innovation in additive manufacturing is conductive inks. Currently metal inks, such as silver (Ag), copper (Cu), nickel (Ni), platinum (Pt) and gold (Au), are widely used for circuits, gas, thermal and biological sensors due to their high electrical conductivity, catalytic activity and high corrosion resistance. However, traditional metallic inks are based on metal nanoparticles (NPs): these inks contain colloidal NPs suspension captured by ligands to prevent agglomeration. Performance of these inks is degraded by their high electrical resistivity and short shelf life. Additionally, making NPs based Ag, Pt and Au inks is expensive and not environmentally friendly. Solution: Particle-free Cu, Ni, Ag, Au and Pt conductive inks from Electronink...

Wearable devices could soon be entirely made of recycled waste materials – and powered by human movement, thanks to a new energy-harvesting device developed at the University of Surrey. The research was published in ACS Applied Materials & Interfaces. Scientists have unveiled a wrist device made from discarded paper wipes and plastic cups that runs on energy harvested by the wearer's movements. The prototype device can transmit Morse code, and the team is now focusing on plans to use this technology in smartwatches. Dr. Bhaskar Dudem, project lead and Research Fellow at the University of Surrey's Advanced Technology Institute (ATI), said: "It won't be long until we have to ask ourselves which of the items we own are not connected to the internet. However, the current internet-of-things (IoT) revolution highlights the simple fact that our planet doesn't have the raw resources to continue to make these devices which are in such high demand. "Our research demonstrates that there is a path to creating sustainable technology that runs on electricity powered by us, the users of that technology." Surrey's device is 'self-powered' thanks to materials that become electrically charged after they come into contact with one another. These materials (also known as Triboelectric Nanogenerators (TENGs)) use static charge to harvest energy from movement through a ...

Company: Break | Date: 9-10 Feb 2022 | Full Presentation Join TechBlick on an annual pass to join all live online conference or online version of onsite conference access library of on-demand talks (600 talks + PDFs) portfolio of expert led masterclass year-round platform https://www.techblick.com/ Our next battery-related event will take place on 15-16 FEB 2023, covering 1) Solid-State Batteries: Innovations, Promising Start-Ups, & Future Roadmap 2) Battery Materials: Next-Generation & Beyond Lithium Ion The speakers include: General Motors, Graphenix Development, Brookhaven National Laboratory, Fraunhofer IKTS, RWTH Aachen University, Lawrence Livermore National Laboratories, Meta Materials Inc, Skeleton Technologies, Solid State Battery Inc, Argonne National Laboratories, OneD Battery Sciences, VTT, Leyden Jar Technologies B.V., b-Science, Rho Motion, Wevo-Chemie, LiNA Energy, CNM Technologies, Ionblox, Empa, Zinc8 Energy Solutions, Avicenne Energy, Echiontech, South8 Technologies, Basquevolt, NanoXplore, Chasm, Li Metal, Sila Nanotechnologies, Quantumscape (tentative), Fraunhofer ISI, etc https://www.techblick.com/...