Effects of capping on GaN quantum dots deposited on Al0.5Ga0.5N by molecular beam epitaxy
The impact of the capping process on the structural and morphological properties of GaN quantum dots (QDs) grown on fully relaxed Al0.5Ga0.5N templates was studied by transmission electron microscopy....
The impact of the capping process on the structural and morphological properties of GaN quantum dots (QDs) grown on fully relaxed Al0.5Ga0.5N templates was studied by transmission electron microscopy....
The effect of layer absorbance for complex surface enhanced Raman scattering substrates
The “hot spots” mechanism is a common wisdom for surface enhanced Raman scattering (SERS). We argue that this is true when the hot spots are directly exposed to the detector. For complex S...
The “hot spots” mechanism is a common wisdom for surface enhanced Raman scattering (SERS). We argue that this is true when the hot spots are directly exposed to the detector. For complex S...
Effect of gas rarefaction on the performance of submicron fins
Appl. Phys. Lett. 94, 143106 (2009); doi:10.1063/1.3115786
Published 10 April 2009
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High thermal conductivity and high surface to volume ratios of nanostructures such as carbon nanotubes and metallic nanowires make them great candidates as micro/nano-fins and thus a potential solution to the ever-increasing thermal management challenges in electronics and photonics. With sizes ranging in the order of a few hundred nanometers or less, the fluid flow through these structures fall in the transition, slip, and even molecular transport regimes. The effects of the velocity and temperature slips (gas rarefaction) could not be neglected. In this study, a simple analytical model has been developed to predict the effect of gas rarefaction on the heat transfer performance of submicron fins. It is shown that the effects of gas rarefaction should be taken into account when designing micro/nano-fins since such effects can significantly reduce the heat transfer enhancement postulated for micro/nano-fins.
©2009 American Institute of Physics
| History: | Received 25 November 2008; accepted 16 March 2009; published 10 April 2009 |
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http://link.aip.org/link/?APPLAB/94/143106/1 |
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