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A new material could act as a nanofridge for microchips
Date:10/8/2008

rtically aligned with those of the lower layer. This is achieved by introducing a small sub-layer of carbon between each layer of silicon and Ge nanodots, which hides the information of the quantum dots found on the lower levels. The main result of the uncorrelation between consecutive layers is the reduction in thermal conductivity, since it becomes more difficult to transport heat perpendicularly from the multilayers. Researchers were able to prove that this reduction reached a factor in excess of 2 when compared to structures with a vertical correlation of dots. This could greatly influence the design of new materials with improved thermoelectric characteristics and pave the way for the creation of nanofridges for common semiconductor devices, given that the structure is compatible with silicon technology.

Ge-based structures also could be used in high-temperature applications, such as in recovering heat generated in combustion processes and converting it to electrical energy.

A second and important aspect of this project is the theoretic study of the thermal properties this new material contains through a simple model based on the modification of the Fourier heat equation, which can predict its behaviour according to the dimensions of its characteristics. Thus with the help of results from previous studies, researchers were able to understand the theoretical foundations of thermal behaviour of this nanostructured material.


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Contact: Javier Rodriguez
javier.rodriguez@uab.cat
34-935-811-769
Universitat Autonoma de Barcelona
Source:Eurekalert

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