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Tag Archives: semiconductor
Graphene transistor: Two layers may be better than one
One of the characteristics of clever science is to look at a new material from every which way. So it is with graphene. Graphene is a sheet of carbon atoms, in a layer one atom thick, arranged in the pattern of a honeycomb. It sounds simple, and is anything but. Its super-thinness in this precise [...]
Posted in News: Nanotechnology Also tagged band gap, bandgap, bilayer, electronics, graphene, graphene transistor, NIST, silicon Leave a comment
Graphene spintronics: Studies show promise
If you’ve had any contact with the concept of ‘digital devices’ (as in theory of, not the use of) you’ve heard it explained like ‘switches’ (i.e. gates) that are either ON or OFF, zeroes or ones – the binary code – that sort of thing. Information is stored or processed based on a sequence of [...]
Posted in News: Nanotechnology Also tagged digital computing, graphene, graphite, nanotechnology, nanotube, quantum mechanics, spintronics Leave a comment
Potential windows: Transparent solar panel material
“Roll up the windows, honey. The battery needs charging.” Transparent solar cells could have many uses, which puts them on the alternative energy research agenda. One approach, described in the journal Chemistry of Materials [Structural dynamics and charge transfer via complexation with fullerene in large area conjugated polymer honeycomb thin films] developed by a research [...]
Posted in News: Alternative Energy Also tagged alternative energy, buckyball, fullerene, polymer, solar energy, solar panel, water deposition Leave a comment
Graphene oxide memristors combine cheap and flexible
In electronics graphene is quickly becoming the great hope for replacing and improving upon silicon semiconductors. Since silicon semiconductors are the basis of much commercial electronics (especially computing), we’re talking the Big Time here. This attracts a lot of research money, which in turn attracts researchers to probe opportunities in a number of directions. One [...]
Posted in News: Nanotechnology Also tagged electronics, graphene, graphene oxide, graphite, HP, memristor, transistor Leave a comment
Graphene: Diverse advances
Scientists thought they understood carbon, until nanotechnology came along. Working with carbon at the atomic level (the nanoscale) has revealed many surprising properties. In particular, graphene, a sheet of carbon one atom thick with the atoms arranged in a lattice of hexagons like a honeycomb, has proven to be astonishingly versatile. For example, two recent [...]
Posted in News: Nanotechnology Also tagged DNA, electronics, electrons, graphene, nanopore, nucleobases, sequencing, transistor Leave a comment
Quantum dots do it: The dark pulse laser
Lasers come in many variations of light: Red, blue, infrared, ultraviolet and so on. Now there is a laser that produces non-light – the dark pulse laser. Developed by a joint project of the National Institute of Standards (NIST, USA) and Joint Institute for Laboratory Astrophysics (JILA, University of Colorado, USA), the dark pulse laser [...]
Posted in News: Quantum Physics Also tagged crystals, dark pulse, JILA, laser, NIST, qdots, quantum dots, quantum physics Leave a comment
Fixing the band gap with graphene nanomesh
A band gap in semiconductor terminology is not the difference between two rock groups. Semiconductors – like the silicon of computer chips – are structured in bands of energy where electrons flow along the bands but may or may not be able to move between bands. Two such bands are the valence band (the highest [...]
Posted in News: Nanotechnology Also tagged bandwidth gap, biosensors, graphene, nanomesh, on-off ratio, silicon, spintronics Leave a comment
High volume production for graphene
Graphene is – potentially – the new wonder-nanotech-material for the semiconductor industry (that’s the ‘chip’ business for computers and everything else digital). In the form of a pure carbon sheet with many interesting electrical properties, graphene is an upgrade for the old reliable silicon. [SciTechStory: Big news for nanoscale graphene] However, despite the many research [...]
Posted in News: Nanotechnology Also tagged graphene, manufacturing, nanotechnology, silicon Leave a comment
A lasing germanium
Germanium, a semiconducting element, is not supposed to lase. That is, when it gets its electrons excited, they go flying off as heat – not light. So the conventional wisdom in microelectronic circles (and textbooks) is that germanium does not lase – and can’t be made to work in a laser. This was unfortunate, because [...]
Posted in News: Communications Also tagged communications, gallium arsenide, germanium, laser, MIT, optical computing, photons Leave a comment
Promising new material: Electronic and optically active photonic crystals