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“#Scientists propose nano-confinement strategy to form sub-nanometer reactors” TEM image of a triple-atom active center and the schematic illustration of a sub-nanometer reactor hosting it for catalyzing NRR. Credit: LIANG Ji Single-atom catalysts (SACs) are promising in electrocatalysis processes due to their maximum utilization of active species. However, manipulation of these atomic-scale active sites to…
“#Autonomous robot plays with NanoLEGO” Scanning tunneling microscope of the research group around Dr. Christian Wagner (PGI-3) at Forschungszentrum Jülich. Credit: Forschungszentrum Jülich/Christian Wagner Molecules are the building blocks of everyday life. Many materials are composed of them, a little like a LEGO model consists of a multitude of different bricks. But while individual LEGO…
“#Ambient light alters refraction in 2-D material” Atoms in the crystal lattice of tantalum disulfide arrange themselves into six-pointed stars that can be manipulated by light, according to Rice University researchers. The phenomenon can be used to control the material’s refractive index. It could become useful for 3D displays, virtual reality and in lidar systems…
“#Memory in a metal, enabled by quantum geometry” Information is stored by changing the relative position of the metal layer (the gold ball in the figure) with the thickness of three atomic layers. The vortex and its color reveal the dynamic change of Berry curvature in band structure while layers’ gliding; the numbers 1 and…
“#Round nanoparticles improve quality factors of surface lattice resonances” An energy flux propagates along a surface and bypasses the nanoparticle at SLR. The hemisphere shape introduces weaker perturbations than the rod shape, resulting in much lower loss and a much higher quality factor. Credit: SIAT Plasmonic surface lattice resonances (SLRs) supported by metal nanoparticle arrays…
“#A four-state magnetic tunnel junction for novel spintronics applications” This visualisation shows layers of graphene used for membranes. Credit: University of Manchester A tunnel junction is a device consisting of two conducting layers separated by an insulating layer. Classically, the resistance for driving current across an insulating layer is infinite; however, when the insulating layer…
“#Scientists demonstrate tunable, atomically thin semiconductors” Electron microscopy experiments revealed meandering stripes formed by metal atoms of rhenium and niobium in the lattice structure of a 2D transition metal dichalcogenide alloy. Credit: Amin Azizi To tune the band gap, a key parameter in controlling the electrical conductivity and optical properties of semiconductors, researchers typically engineer…
“#Graphene sensors find subtleties in magnetic fields” Credit: CC0 Public Domain As with actors and opera singers, when measuring magnetic fields it helps to have range. Cornell researchers used an ultrathin graphene “sandwich” to create a tiny magnetic field sensor that can operate over a greater temperature range than previous sensors, while also detecting miniscule…
“#Research touts lower-cost, longer-life battery” Credit: CC0 Public Domain New materials engineering research led by Western could translate into significant real-world benefits like greater range for electric vehicles and longer battery life for cell phones. Researchers from Western Engineering, Western’s department of chemistry and Soochow University-Western University Center for Synchrotron Radiation Research collaborated with the…
“#A light bright and tiny: Scientists build a better nanoscale LED” The fin LED pixel design includes the glowing zinc oxide fin (purple), isolating dielectric material (green), and metal contact (yellow atop green). Credit: B. Nikoobakht / N. Hanacek, NIST A new design for light-emitting diodes (LEDs) developed by a team including scientists at the…