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【正文】 a?lar 214。Structure Determination of Graphene by TEM XIAO Gaobo 11900474R Outline ? Brief introduction about graphene ? Review of TEM ? How scientists use TEM to study the structure of graphene ? Summary Graphene is a oneatomthick planar sheet of sp2bonded carbon atoms that are densely packed in a honeyb crystal lattice. Molecular structure of graphene High resolution transmission electron microscope images of graphene Graphene is as the strongest material ever measured, some 200 times stronger than structural steel Electrical conductivity % transmittance of white light Thermal conductivity Outline ? Brief introduction about graphene ? Review of TEM ? How scientists use TEM to study the structure of graphene ? Summary TEM Transmission electron microscope Working modes of TEM ? Diffraction mode ? Imaging mode 1 Amplitude contrast A) mass/thickness B) diffraction
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