Tag Archives: semiconductor

A new twist for graphene: Trying to solve the bandgap problem

Although it’s like a sheet of paper (if paper could be only one atom thick), but “Do not bend, fold, mutilate or spindle” does not apply to sheets of graphene. Scientists all over the world are doing all of the above and a lot more to graphene in search of its many surprising properties. From […]
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Promising new material: Electronic and optically active photonic crystals

Although it’s not as tricky as producing new drugs for medicine, developing new materials for commercial electronics is usually no sure thing. There is a long path of testing and development between the first prototype material and something that can be manufactured in large quantities and used in a variety of products. On top of […]
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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 […]
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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 […]
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The MIM diode: Another challenger for the electronics crown

Sometimes good ideas in technology languish because of serious implementation hurdles. The MIM diode (Metal-Insulator-Metal) was one of those technologies. Note the past tense. Essentially, a diode conducts an electrical current in only one direction. Like a check valve with water, it won’t allow back flow. However, more sophisticated diodes do more than act like […]
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Fluorographene: The Teflon alternative and more

So you won a Nobel Prize for graphene; what do you do for an encore? Make something really useful out of it. Andre Geim at the University of Manchester, along with his colleague Kostya Novoselov put graphene on the (scientific) map around 2004. Their 2010 Nobel Prize put graphene into the public eye and made […]
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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 […]
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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 […]
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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 […]
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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 […]
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