Blog
- Graphene Origami Reaches Quantum Precision 25/08/2019 It’s easier to fold a napkin than a notepad. The potential to manipulate graphite into precise nanostructures using a scanning probe microscope has teased researchers ever since Thomas W. Ebbesen and Hidefumi Hiura first reported accidental tears and folds in their graphite during scanning tunnelling microscope (STM) experiments in the mid-1990s.
- Synthetic Antiferromagnets Host Room-Temperature Skyrmions 24/08/2019 Researchers have succeeded in stabilizing antiferromagnetic skyrmions in an ordinary material system at room temperature for the first time.
- A Million Pulses Per Second: How Particle Accelerators Are Powering X-Ray Lasers 23/08/2019 Researchers in biology, chemistry and physics will use LCLS-II to probe fundamental pieces of matter, creating 3-D movies of complex molecules in action, making LCLS-II a powerful, versatile instrument at the forefront of discovery.
- A Chip Made With Carbon Nanotubes, Not Silicon, Marks A Computing Milestone 22/08/2019 The prototype could give rise to a new generation of faster, more energy-efficient electronics
- Nanoscale Graphene Sheets Folded Into Atomic Crêpes 21/08/2019 Atom-thick sheets stacked with precise twist angle and tubular edge could be made into quantum nanomachines
- Ferromagnetism Appears In Twisted Bilayer Graphene 19/08/2019 Researchers have found that electrons organize themselves into a new kind of ferromagnet in twisted bilayer graphene (TBG).
- Atomic Force Microscopy Goes 3D 16/08/2019 Ten years ago, researchers succeeded in significantly increasing the lateral resolution of low temperature atomic force microscopy (AFM) by functionalizing the AFM tip with a single carbon monoxide (CO) molecule.
- Granular Aluminium Superinductors Could Enhance Qubit Performance 14/08/2019 Use of superconducting circuits in quantum computing architectures is growing, yet the greatest resistance they face might come from not having enough of it.
- Terahertz Light Pulses Speed Up Spin Switching 14/08/2019 A new technique to rapidly reverse a magnet’s polarity in a way that all of its spins coherently rotate could be used to develop more energy-efficient data storage devices and superfast computers in the future.
- CuInSe2 Quantum Dots Grown By Molecular Beam Epitaxy On Amorphous SiO2 surfaces 13/08/2019 The currently most efficient polycrystalline solar cells are based on the Cu(In,Ga)Se2 compound as a light absorption layer. However, in view of new concepts of nanostructured solar cells, CuInSe2 nanostructures are of high interest. In this work, we report CuInSe2 nanodots grown through a vacuum-compatible co-evaporation growth process on an amorphous surface. The density, mean size, and peak optical emission energy of the nanodots can be controlled by changing the growth temperature. Scanning transmission electron microscopy measurements confirmed the crystallinity of the nanodots as well as chemical composition and structure compatible with tetragonal CuInSe2. Photoluminescence measurements of CdS-passivated nanodots showed that the nanodots are optoelectronically active with a broad emission extending to energies above the CuInSe2 bulk bandgap and in agreement with the distribution of sizes. A blue-shift of the luminescence is observed as the average size of the nanodots gets smaller, evidencing quantum confinement in all samples. By using simple quantum confinement calculations, we correlate the photoluminescence peak emission energy with the average size of the nanodots
- This One 'Anomaly' Is Driving Physicists To Search For Light Dark Matter 12/08/2019 We buy our own products and put them under the same testing methodology so that you can easily compare them.