By Thomas Willum Hansen, Jakob Birkedal Wagner
This booklet illustrates the sensible workings of environmental transmission electron microscopy (ETEM) from historical past and tool layout via to fixing useful difficulties. points of software layout, functionality, and working techniques are lined, including universal difficulties and pitfalls of the procedure. not just will a effectively operated software and a gently arrange test offer new perception into your specimen, however the skill to watch the specimen in its usual habitat should be necessary to assembly particular layout standards for the improvement of the subsequent new release of fabrics. over the last 5 many years, transmission electron microscopy (TEM) below environmental stipulations appropriate to a specific pattern has been of accelerating curiosity. Symposia facing the subject are actually probably the greatest attended at overseas microscopy meetings. considering common working modes for the ETEM require the pattern be subjected to a harsh setting together with corrosive gases and excessive temperatures, the demanding situations of adapting and working the device for remark below dynamic working stipulations are a number of. in spite of the fact that, cautious attention of the interplay of the electrons with the gases and pattern, in addition to the gases with the microscope elements, may end up in hugely lucrative effects. In Controlled surroundings Transmission Electron Microscopy, best specialists assist you to accomplish profitable experiments utilizing the ETEM, and to interpret and comprehend the results.
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Albrecht, A. Knop-Gericke, R. Schl€ogl, J. Robertson, State of transition metal catalysts during carbon nanotube growth. J. Phys. Chem. C 113, 1648–1656 (2009) S. Iijima, Helical microtubules of graphitic carbon. Nature 354, 56–58 (1991) T. Ito, K. Hiziya, A specimen reaction device for the electron microscope and its applications. J. R. Jinschek, S. Helveg, Image resolution and sensitivity in an environmental transmission electron microscope. R. Jinschek, Advances in the environmental transmission electron microscope (ETEM) for nanoscale in situ studies of gas–solid interactions.
In situ growth studies of nanowires have led to new insights into the VLS growth mechanism. Ross and coworkers (2005) found that Si nanowires growing from a Si-Au eutectic show periodic sawtooth facets, which are at an angle to the growth direction. The wire surface is not smooth. Rather, growth occurs at a (111) facet at the end of the wire, and the size and shape of this facet oscillates periodically during growth. At higher temperatures and lower pressures, the presence of small amounts of oxygen was found to change the morphology of Si nanowires grown using the VLS process with Au (Kodambaka et al.
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