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Graphenee

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Transcript

  • 1. Black in colour Bright in Nature
    By
    B.Gopal
    05-08-4124L
    GRAPHENE
  • 2.
    • Introduction
    • 3. History and experimental Discovery
    • 4. Preparative methods
    • 5. Applications
    • 6. Advantages and Limitations
    • 7. Reference
    • 8. Queries
    Out line
  • 9.
    • “It is the thinnest known material in the universe, and the strongest ever measured,” wrote University of Manchester physicist Andre Geim.
    • 10. Graphene is a one-atom-thick planar sheet.
    • 11. The carbon-carbon bond length in graphene is about 0.142 nm.
    • 12. 3million Graphene sheets would be only one millimeter thick of Graphite.
    Introduction
  • 13.
    • The term graphene first appeared in 1987 to describe single sheets of graphite.
    • 14. Theory of graphene was first explored by Philip R Wallace in 1947 as a starting point for understanding the electronic properties of more complex, 3D graphite.
    • 15. Andre Geim and Kostya Novoselov  at Manchester University managed to extract single-atom-thick crystallites (graphene) from bulk graphite in 2004.
    History
  • 16.
    • In 2004, the Russian researchers obtained graphene by mechanical exfoliation of graphite.
    • 17. The researchers simplified the technique and started using dry deposition.
    • 18. There were a number of previous attempts to make atomically thin graphitic films vary by using exfoliation techniques.
    Preparative methods
  • 19.
    • Yet another method of obtaining graphene is to heat silicon carbide to high temperatures (>1100 °C) to reduce it to graphene.
    • 20. Epitaxial graphene on silicon carbide can be patterned using standard microelectronics methods.
    • 21. Many important graphene properties have been identified in graphene produced by this method. For example, the electronic band-structure (so-called Dirac cone structure) has been first visualized in this material. 
    Epitaxial growth on silicon carbide
  • 22. Applications
  • 29.
    • Very small in size
    • 30. Highly flexible
    • 31. Can be used as 1D,2Dand 3D
    • 32. Very high conductivity
    • 33. Super conductor at room temperature .,etc
    • 34. Comparatively very few disadvantages
    Advantages & Disadvantages
  • 35.
    •  H. P. Boehm, R. Setton, E. Stumpp (1994). "Nomenclature and terminology of graphite intercalation compounds". Pure and Applied Chemistry 
    • 36.  H. C. Schniepp, J.-L. Li, M. J. McAllister, H. Sai, M. Herrera-Alonso, D. H. Adamson, R. K. Prud’homme, R. Car, D. A. Saville, I. A. Aksay (2006). "Functionalized Single Graphene Sheets Derived from Splitting Graphite Oxide". The Journal of Physical Chemistry
    • 37. P. Boehm, A. Clauss, G. O. Fischer, U. Hofmann (1962). "Das Adsorptionsverhalten sehr dünner Kohlenstoffolien". Zeitschrift für anorganische und allgemeine Chemie
    • 38. www.wikipedia.org/graphene
    Reference
  • 39. Quaries?
  • 40. Thank you...