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Keyword: tem

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  • Graphene puts wet chemistry under the microscope

    04/08/2012 12:54:35 PM PDT · by neverdem · 7 replies
    Chemistry World ^ | 05 April 2012 | Simon Hadlington
    The list of remarkable applications for graphene grows ever longer. This time, scientists in the US and Korea have shown that the single-atom thick carbon membrane can be used as a cover slip for an electron microscope to allow atomic-resolution observations of wet chemistry - something that is notoriously tricky to achieve. The graphene cover slip allows researchers to watch liquid chemistry taking place in much greater detail © Image courtesy of Alivisatos, Lee and Zettl research groups, Lawrence Berkeley National Laboratory and KAIST The researchers wanted to investigate how platinum nanocrystals form from solution. 'Seeing the crystals form at...
  • Single atoms spied on graphene sliver

    07/17/2008 10:06:48 PM PDT · by neverdem · 9 replies · 376+ views
    Nature News ^ | 16 July 2008 | Katharine Sanderson
    Electron microscope spots hydrogen atoms resting on invisible carbon sheet. The smallest of atoms can now be seen sitting in splendid isolation with a standard transmission electron microscope, thanks to the most fashionable form of carbon, graphene. The technique, developed by scientists at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory, California, could help to produce images of individual molecules in atomic detail using relatively conventional laboratory kit. The research is reported in this week's Nature1. A transmission electron microscope (TEM) works by firing a beam of electrons through a very thin sample supported by a scaffold....