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      Helium Ion Microscopy

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          Abstract

          Helium Ion Microcopy (HIM) based on Gas Field Ion Sources (GFIS) represents a new ultra high resolution microscopy and nano-fabrication technique. It is an enabling technology that not only provides imagery of conducting as well as uncoated insulating nano-structures but also allows to create these features. The latter can be achieved using resists or material removal due to sputtering. The close to free-form sculpting of structures over several length scales has been made possible by the extension of the method to other gases such as Neon. A brief introduction of the underlying physics as well as a broad review of the applicability of the method is presented in this review.

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          Quantitative electron spectroscopy of surfaces: A standard data base for electron inelastic mean free paths in solids

           M. Seah,  W. Dench (1979)
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            Impermeable Atomic Membranes from Graphene Sheets

            We demonstrate that a monolayer graphene membrane is impermeable to standard gases including helium. By applying a pressure difference across the membrane, we measure both the elastic constants and the mass of a single layer of graphene. This pressurized graphene membrane is the world's thinnest balloon and provides a unique separation barrier between 2 distinct regions that is only one atom thick.
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              The nitrogen-vacancy colour centre in diamond

              The nitrogen-vacancy (NV) colour centre in diamond is an important physical system for emergent quantum technologies, including quantum metrology, information processing and communications, as well as for various nanotechnologies, such as biological and sub-diffraction limit imaging, and for tests of entanglement in quantum mechanics. Given this array of existing and potential applications and the almost 50 years of NV research, one would expect that the physics of the centre is well understood, however, the study of the NV centre has proved challenging, with many early assertions now believed false and many remaining issues yet to be resolved. This review represents the first time that the key empirical and ab initio results have been extracted from the extensive NV literature and assembled into one consistent picture of the current understanding of the centre. As a result, the key unresolved issues concerning the NV centre are identified and the possible avenues for their resolution are examined.
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                Author and article information

                Journal
                07 November 2013
                2014-01-11
                10.1116/1.4863676
                1311.1711

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                Custom metadata
                Journal of Vacuum Science and Technology B 32(2), 020801 (2014)
                Revised version
                cond-mat.mtrl-sci cond-mat.mes-hall

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