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Hexagonal Packing Factor - Functional Molecules

  1. Sep 8, 2011 #1
    1. The problem statement, all variables and given/known data

    the sulphur atoms in the self-assembled monolayers are ~ 4.99Å apart, and that they form a hexagonal close-pack structure, estimate the number of functional molecules/cm2 of the substrate

    2. Relevant equations
    1 angstrom = 1.0 × 10[itex]^{-10}[/itex] metres

    Area of hexagon = 2.598t[itex]^{2}[/itex] where t=length of hexagon side

    APF of a hexagonal structure = 0.74

    3. The attempt at a solution

    I have tried searching google, but the only solution I can come up with is:

    Working out the area of the hexagon, by assuming that the 4.99Å is the length of the hexagon side. Then I believe a HCP structure has 7 atoms, therefore I divide the area calculated by 7 to get molecules/Å[itex]^{2}[/itex] which I convert to molecules/cm[itex]^{2}[/itex]

    No idea if what I am doing is correct!
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
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