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Surprising Graphene: Honing in on graphene electronics with infrared synchrotron radiation

A flake of exfoliated graphene 50 micrometers square was placed on layers of silicon dioxide insulator and a silicon gate. The schematic, left, shows how gold contacts were attached to the graphene to apply gate voltage. A 10-micrometer beam of infrared synchrotron radiation (red spot) was focused onto the graphene to measure transmission and reflectance spectra.

Nanotechnology: Graphene takes on carbon nanotubes

Carbon nanotubes might have a cheaper, less controversial alternative in graphene, a single-layer flat sheet of carbon atoms that promotes strength and conductivity. Researchers at Northwestern University published their findings in Nature Nanotechnology, reporting that the breakthrough was made possible by isolating the proper kind of graphene sheet. According to a report from the Massachusetts Institute of Technology Review, having a few hydroxyl groups or oxygen atoms loose on the surface of graphene allows the material to link to polymers and disperse evenly. Researchers at Princeton, who coauthored the paper, were able to generate this form of graphene by expanding graphite oxide rapidly at high temperatures.

Surprising graphene: Honing in on graphene electronics with infrared synchrotron radiation

A flake of exfoliated graphene 50 micrometers square was placed on layers of silicon dioxide insulator and a silicon gate. The schematic left shows how gold contacts were attached to the graphene to apply gate voltage. A 10-micrometer beam of infrare ...

Surprising Graphene: Honing in on Graphene Electronics With Infrared Synchrotron Radiation

BERKELEY, Calif., June 9 (AScribe Newswire) -- Graphene is the two-dimensional crystalline form of carbon: a single layer of carbon atoms arranged in hexagons, like a sheet of chicken wire with an atom at each nexus. As free-standing objects, such two-dimensional crystals were believed impossible to create -- even to exist -- until physicists at the University of Manchester actually made graphene in 2004.

Graphene has record-breaking strength

Graphene is the strongest material in the world, according to new experiments done by researchers at Columbia University in the US. The secret to the material's extraordinary strength, says the team, lies in the robustness of the covalent carbon-carbon bond and the fact that the graphene monolayers tested were defect-free.

Honing in on graphene electronics with infrared synchrotron radiation

Graphene is the two-dimensional crystalline form of carbon: a single layer of carbon atoms arranged in hexagons, like a sheet of chicken wire with an atom at each nexus. As free-standing objects, such two-dimensional crystals were believed impossible to create -- even to exist -- until physicists at the University of Manchester actually made graphene in 2004.

Surprising graphene - honing in on graphene electronics with infrared synchrotron radiation

CNSE's Associate VP of Technology Dr. Ryan Accepts Position as the Founding Dean of the Joint School of Nanoscience and Nanoengineering of UNCG

One molecule thick nanotechnology membranes take shape

(Nanowerk Spotlight) Since its discovery in 2004, graphene has created quite a buzz among scientists (Nanotechnology researchers go ballistic over graphene). The reason they are so excited is that two-dimensional crystals (it's called 2D because it extends in only two dimensions - length and width; as the material is only one atom thick, the third dimension, height, is considered to be zero) open up a whole new class of materials with novel electronic, optical and mechanical properties. For instance, the ultimate size limit for a nano-electromechanical system (NEMS) would be a nanoscale resonator that is only one atom thick, but this puts severe constraints on the material; as a single layer of atoms, it should be robust, stiff, and stable. Graphene, the simplest of the 2D conjugated carbon nanomaterials, could fit that bill.

Graphene oxide for transparent electronics

Researchers in the US have developed a new and simple solution-based method to deposit graphene oxide onto a variety of substrates in a controlled way at room temperature. The large-area ultrathin films produced are transparent and their electrical properties can be tuned from semiconducting to metallic by controlling their thickness. The technique shows promise for making devices like electrodes for solar cells.

Graphene could be used one day in large-area thin film electronics

Researchers at the Nanomaterials and Devices Group at Rutgers University have found a simple way to uniformly deposit between one and five layers of graphene from reduced GO in the form of thin films to create transistors and proof-of concept electrodes for organic photovoltaics.

Using graphene, researchers led by chemist Hongjie Dai develop field-effect transistor that can operate at room temperature

A schematic of graphene nanoribbon field-effect transistor with palladium contacts (S,D) on a 10 nm thick insulating silicon dioxide surface (purple). Beneath the Si02 layer is a highly conductive silicon layer (G). Courtesy of the Dai Group

Physicists reveal new secrets about graphene

(Nanowerk News) Using one of the world’s most powerful sources of man-made radiation, physicists from UC San Diego, Columbia University and Lawrence Berkeley National Laboratory have uncovered new secrets about the properties of graphene—a form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

Graphene substrate reveals hydrogen atoms

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Imaging and dynamics of light atoms and molecules on graphene

Observing the individual building blocks of matter is one of the primary goals of microscopy. The invention of the scanning tunnelling microscope1 revolutionized experimental surface science in that atomic-scale features on a solid-state surface could finally be readily imaged. However, scanning tunnelling microscopy has limited applicability due to restrictions in, for example, sample conductivity, cleanliness, and data acquisition rate. An older microscopy technique, that of transmission electron microscopy (TEM)2, 3, has benefited tremendously in recent years from subtle instrumentation advances, and individual heavy (high-atomic-number) atoms can now be detected by TEM4, 5, 6, 7 even when embedded within a semiconductor material8, 9. But detecting an individual low-atomic-number atom, for example carbon or even hydrogen, is still extr

eMediaWorld.com: Photovoltaic Solar Cells Inc Files For a Patent On Its Dye Doped Graphite/Graphene Solar Cell

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Platteville nanotech firm wins Business Plan contest

Graphene Solutions, a nanotechnology company in Platteville that features a 17-year-old student on its scientific team, has been named the grand prize winner in the 2008 Wisconsin Governor's Business Plan Contest.

Nanotechnology Company Wins 2008 Wisconsin Governor's Business Plan Contest

(Nanowerk News) Graphene Solutions, a nanotechnology company that features a 17-year-old student on its scientific team, is the grand prize winner in the 2008 Wisconsin Governor's Business Plan Contest, state officials announced.

U.S. physicists reveal secrets of newest form of carbon

A group of U.S. physicists have uncovered new secrets about the properties of graphene -- a newest form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

US physicists reveal secrets of newest form of carbon

WASHINGTON (Xinhua): A group of U.S. physicists have uncovered new secrets about the properties of graphene -- a newest form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

U.S. physicists reveal secrets of newest form of carbon

WASHINGTON, June 10 (Xinhua) -- A group of U.S. physicists have uncovered new secrets about the properties of graphene -- a newest form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

UC San Diego Physicists Reveal Secrets of Newest Form of Carbon

Using one of the world’s most powerful sources of man-made radiation, physicists from UC San Diego, Columbia University and Lawrence Berkeley National Laboratory have uncovered new secrets about the properties of graphene—a form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

Physicists reveal secrets of newest form of carbon

Using one of the world's most powerful sources of man-made radiation, physicists from UC San Diego, Columbia University and Lawrence Berkeley National Laboratory have uncovered new secrets about the properties of graphene—a form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

Physicists Reveal Secrets Of Newest Form Of Carbon

Using one of the world’s most powerful sources of man-made radiation, physicists from UC San Diego, Columbia University and Lawrence Berkeley National Laboratory have uncovered new secrets about the properties of graphene—a form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

UC San Diego Physicists Reveal Secrets of Newest Form of Carbon

12 Jun 2008 - Using one of the world's most powerful sources of man-made radiation, physicists from UC San Diego, Columbia University and Lawrence Berkeley National Laboratory have uncovered new secrets about the properties of graphene - a form of pure carbon that may one day replace the silicon in computers, televisions, mobile phones and other common electronic devices.

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