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Carbon Nanotube Thermal Interface Materials

posted Jun 14, 2013, 8:45 AM by Timothy Fisher   [ updated Jun 16, 2013, 5:56 AM by Tim Fisher ]

Student: Stephen Hodson

Faculty: Tim Fisher

Sponsor: Raytheon Integrated Systems / DARPA

Challenges

  • Strengthen thermal connection between two surfaces
  • Mitigate weak bonding at heterogenous interfaces
  • Address differences in phonon dispersion & density of states
  • Combat wave constriction affects at nanoscale contacts
  • Maintain performance under thermal cycling and stability conditions
  • Accurately characterize the CNT array (density, diameter distribution, and height)

Approach

  • Growth of vertically aligned multi-walled CNT arrays on various substrates
  • Development of bonding techniques that include post-growth functionalization and coating
  • Assess thermal performance by photoacoustic and ns-thermoreflectance techniques
  • Model statistical nature of CNT array characteristics (density and height)

Selected publications

Palladium Thiolate Bonding of Carbon Nanotube Thermal Interfaces

Characterization of Metallically Bonded CNT-Based TIMs Using a High Accuracy 1D Steady-State Technique
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