My research at NC State University

Go to NC State's website

   
    Growth and characterization of GaN
     
    I have started my research at NC State with the growth and characterization of GaN.
    Growth was performed utilizing molecular beam epitaxy (MBE).
  Characterization  was done by photoluminescence (PEL) and capacitance/voltage measurements.
   
    My research at Arizona State University
     
    Growth and characterization of intrinsic and doped single crystal diamond. ASU site
     
    Since 1998 I have been working on carbon based materials, mainly doped and  
nanocrystalline diamond and carbon nanotube films.
     
  Diamond films are synthesized utilizing plasma assisted chemical vapor deposition in an Diamond growth.
AsTex IPX 3750 reactor. The plasma, mainly hydrogen, creates atomic species from
    a carbon source (methane, CH4) that can form a diamond crystal structure on a hot
    substrate, here, a single crystal diamond plate.
     
    Characterization includes field- and thermionic emission to explore the potential in thermionic energy conversion.
     
    Thermionic energy conversion is a process where heat is transformed into electricity. This process operates entirely in
  the solid state, i.e. without any moving parts, and with efficiencies exceeding 50% possible.
     
    Thermionic energy converters were first used in space missions as a reliably, low maintenance power source. However,
    metal based flat emitters required high temperatures up to 1900K and were limited by space charge effects, where
    electrons would form a charge cloud adjacent to the emitter surface and prevent electrons from being efficiently removed from
    the cathode. As a countermeasure, ionizing vapors were introduced that reduced space charge effects and also resulted
    in a reduction of the work function of emitter and collector.
     
   

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