Raman Analysis of Hard Carbon Films

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Presentation transcript:

Raman Analysis of Hard Carbon Films Christopher Torres November 16, 2007

Motivation Carbon Exhibits Several Structural Forms Diamond Graphite Lonsdaleite C60 (Buckyball) C540 C70 Amorphous Carbon Carbon Nanotube Diamond – Thin Film High Hardness ~90 GPa Low Coefficient of Friction ~0.01 Chemically Inert Diamond Structure http://en.wikipedia.org Carbon Allotropes http://en.wikipedia.org

Characterization Carbon Film Mechanical Properties Bonding Structure Sp2 Sp3 Chemical Impurities Defects Carbon Structures are Strong Raman Scatters Phonon Crystal Vibrations Sensitive Graphite Structure Raman Signal Changes using Different Light Energies