Posted in | News | Nanoelectronics | Nanoenergy

Multifaceted Material Shows Potential in the Development of Nanoelectronics

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Mar 23 2009

A new PhD thesis from Perovskite is a structure type that consists of three different components: alkaline earth metals such as calcium, transition metals such as iron and negative ions, which are often oxygen. Perovskites are usually described as inorganic chameleons as they are very flexible and can exhibit different properties depending on their environment. They are easy to manufacture, and by varying the structure, new interesting functions can be created in the material.

Present-day fuel cells have a working temperature of 800-1,000°C. They therefore have limited areas of use and require a great deal of energy to heat up.

A supercell structure of an oxygen-deficient perovskite. The supercell structure contains voids, or holes, which make it possible for oxygen ions and/or electrons to move. In doing so, the perovskite can function as a conductor for both ions and electrons.
The fact that perovskites conduct oxygen effectively also means that they can be used in membranes for the separation of oxygen from other gases. An interesting application could be carbon dioxide storage in bedrock, a potentially very important form of technology to slow down climate changes. Before the carbon dioxide is pumped into the bedrock, other gases, including oxygen, must be removed from the gas mixture.

Posted March 23rd, 2009

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