1 / 22

Molecular Electronics

Molecular Electronics. Jason Chiesa May 3, 2006. Overview. What is Molecular Electronics? Advantages of Molecular Electronics Molecular Switch Issues. What is Molecular Electronics?. Sometimes called moletronics

Patman
Download Presentation

Molecular Electronics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Molecular Electronics Jason Chiesa May 3, 2006

  2. Overview • What is Molecular Electronics? • Advantages of Molecular Electronics • Molecular Switch • Issues

  3. What is Molecular Electronics? • Sometimes called moletronics • Molecular electronics is a branch of applied physics which aims at using molecules as passive or active electronic components. • These molecules will perform the functions currently performed by semiconductors.

  4. Why use Molecular Electronics? • Size • Power • Speed • Low Manufacturing Cost • Easier to Manufacture

  5. Size • Molecular Electronics is a way to extend Moore’s Law past the limits of standard semiconductor Circuits. • 100X smaller than their counterparts

  6. Power / Speed • Currently Transistors cannot be stacked, which makes them quite ineffecient! • Molecular technology will be able to add a 3rd dimension. • Femtoseconds switching times.

  7. Manufacturing • Most designs use either spin coating or Self-Assembly process. • Individual Molecules can be made exactly the same by the Billions. • Molecular assembly tends to occur at Room Temperature.

  8. Molecular Switch • Semiconductor switches can be made on a very small scale. • Perform computational functions when placed in the right combination. • Molecular switch is orders of magnitude smaller.

  9. Molecular Chiropticene Switch • One molecule in size. • Switch has two distinct states • Spatial Mirror images of one another. • Electronically and Optically distinct • Distinct but Equal • Chiral property

  10. Symmetric Amine Molecule Rapid thermal oscillation between two forms of an Amine Molecule.

  11. “Assymetrical Narcisstic Reactions”

  12. Operation • In practice, the switch is triggered by light and controlled with an electric field. • Both of these actions can change the direction of the molecule’s dipole by 180 degrees.

  13. Operation cont’d

  14. Constructing the Switch • In order to have control of the crossed arrow dipole vector we must: • Long axis for reaction to occur • Dipole vector points along this axis • Transformation cannot occur at room temp.

  15. Orientation of Dipole Vectors

  16. Potential Energy Profile

  17. Prochiral Form

  18. Photo Reaction

  19. Finally…….

  20. Switch Properties • Stability- Two equal but opposite energy states in these molecules affords stablility as well as reversibility. • Speed- Femtosecond switching speeds

  21. Problems facing Moletronics • Molecular electronics must still be integrated with Silicon. • Among the important issues is the determination of the resistance of a single molecule (both theoritical and experimental). • It is difficult to perform direct characterization since imaging at the molecular scale is often impossible in many experimental devices.

  22. Questions?

More Related