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Regardless if strained or compressed, the new material always expands. CREDIT Thomas Heine et al. Abstract: If you stretch an elastic band, it becomes thinner - a physical behavior that applies to most "common" materials. Since the 20th century, an opposite behavior has been known in materials research: The so-called auxetic (from ancient Greek auxetos, meaning 'stretchable') materials expand in the direction orthogonal to the strain. Likewise, they shrink when they are compressed. Scientifically, they are characterized by a negative Poisson's ratio. Probably the best known and oldest applica...

Our NanoNews Digest Sponsors Home > Press > CEA-Leti Envisions Widespread Use of LiDAR Systems Based on Integrated Optical Phased Arrays (OPAs): OPAs with Solid-State Beam Steering Can Reduce the Cost and Size of LiDAR Systems & Improve Performance; Results Reported at Photonics West 2021 Abstract: Taking a critical step toward developing LiDAR systems for widespread commercial applications, CEA-Leti has developed genetic algorithms to calibrate high-channel-count optical phased arrays (OPAs), as well as an advanced measurement setup enabling wafer-scale OPA characterization. CEA-Leti Envisi...

Dubai inmates learn basics of volunteer work Team KT/Dubai Supplied photo Through programme, the police seek to give inmates a chance to start afresh and channel their energy into productivity. Twenty-seven inmates in Dubai have learnt the basics of volunteer work and community service in two virtual workshops recently organised by the emirate’s General Department of Punitive and Correctional Institutions. The programme was part of the Dubai Police’s Fina Khaer (The Goodness Within) initiatives, and the force’s goal of encouraging more inmates to serve the community as volunteers. Vario...

Nanotechnology Now Home > Press > Instrument at BESSY II shows how light activates MoS2 layers to become catalysts A new instrument at BESSY II can be used to study molybdenum-sulfide thin films that are of interest as catalysts for solar hydrogen production. A light pulse triggers a phase transition from the semiconducting to the metallic phase and thus enhances the catalytic activity. CREDIT Martin Künsting /HZB Abstract: MoS2 thin films of superposed alternating layers of molybdenum and sulfur atoms form a two-dimensional semiconducting surface. However, even a surprisingly low-intensity ...

Our NanoNews Digest Sponsors Home > Press > Light-emitting tattoo engineered for the first time: Scientists at UCL and the IIT -Istituto Italiano di Tecnologia (Italian Institute of Technology) have created a temporary tattoo with light-emitting technology used in TV and smartphone screens, paving the way for a new type of OLED tattoo. CREDIT Barsotti - Italian Institute of Technology. Abstract: Scientists at UCL and the IIT -Istituto Italiano di Tecnologia (Italian Institute of Technology) have created a temporary tattoo with light-emitting technology used in TV and smartphone screens, pavin...