Faculty of Engineering and Natural Sciences
Science and Art, Involving Physics, Chemistry and Engineering, in Building and Understanding the Nano-World of the Future
Marius Enachescu, Ph. D.
Lawrence Berkeley National Laboratory, University of California - Berkeley
Materials Science Division
It is clear now that the matter is composed by atoms, even this was predicted by the ancient scholars. And the atoms were indeed visualized and measured, in 3D, but only at the end of the 20th century, by the laboratory implementation of the quantum effect of tunneling. The technique of Scanning Tunneling Microscopy (STM) will be briefly introduced as well as the technique of Atomic Force Microscopy (AFM), both capable of atomic resolution on various surfaces. It will be presented different modes of operations of STM and AFM, in different environments and their crucial role in advancing the modern science. Also, will be presented the use of STM and AFM as “nano-tools”in handling the atoms or nanometer-seize objects. Some of the slides will show atomic manipulation, or building structures atom-by-atom, or molecule dissociation, or quantum confinement in light emitting porous silicon, or “writing” nano-strutures, or nano-fabrication of electronic nano-devices, or single electron tunneling at room temperature, or nano-tribology and atomic friction, etc. Also, a unique system will be introduced, combining STM-AFM-FIM (Field Ion Microscopy), capable of visualization of the atoms not only of the surface but also of the tip apex, opening the way of controlled atomic contacts.
Dec. 29, 2008, 13:40, FENS L056