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International Heat Transfer Conference 13

ISBN Imprimer: 1-56700-226-9 (CD)
ISBN En ligne: 1-56700-225-0

MULTISCALE AND MULTIPHASE PHYSICS IN PHENOMENA INVOLVING NANOPARTICLES AND APPLICATIONS IN THERMAL NANOMANUFACTURING

DOI: 10.1615/IHTC13.p30.180
page 15

Dimos Poulikakos
Laboratory of Thermodynamics in Emerging Technologies, Institute of Energy Technology Mechanical and Process Engineering Department, ETH Zurich, Switzerland

Résumé

This lecture deals with the topic of thermofluidics in a class of emerging technologies involving nanoparticles. First, the utilization of nanoparticles of matter (with thermophysical properties significantly different than those of their bulk counterparts) will be addressed. Specific to this lecture are carbon nanotubes (with very high thermal conductivity and unique electrical and structural properties) and gold nanoparticles, which possess drastically lower melting temperatures compared to the melting temperature of bulk gold as well as unconventional radiative properties that can be employed in novel technologies. As application examples of the above, the controlled mass transport through carbon nanotubes as well as the novel process of printing and low temperature laser annealing of nanoparticle inks will be discussed. Combining nanoparticle ink writing or printing of microstructures and laser annealing, electrically conductive gold strips of thickness as low as O(10) nm and width O(1) micron are produced. It is possible to manufacture from nanoparticles, resistors possessing electrical resistivities approaching those of bulk gold on temperature sensitive (polymeric) substrates with obvious implications to component manufacturing in microelectronics and other emerging technologies.
On the other hand, in addition to applications involving CNTs for heat transfer and nanocircuitry, it is shown that carbon nanotubes can be also employed to guide the controlled mass transport of nanoparticles. To this end, the thermophoretic motion of nanoparticles in nanotubes will be discussed. The above phenomena involve multiphase and multicsale physics bridging the gap between molecular scales and continuum theory and exemplify the important role of transport phenomena to the development of emerging technologies.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION