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IBM Scientists First to Image the 'Anatomy' of a Molecule
Date:8/27/2009

ays Fabian Mohn, who is working on his Ph.D. thesis at IBM Research - Zurich.

To corroborate the experimental findings and gain further insight into the exact nature of the imaging mechanism, IBM scientist Nikolaj Moll performed first-principles density functional theory calculations of the system investigated. He explains, "The calculations helped us understand what caused the atomic contrast. In fact, we found that its source was Pauli repulsion between the CO and the pentacene molecule." This repulsive force stems from a quantum mechanical effect called the Pauli exclusion principle. It states that two identical electrons can not approach each other too closely.

IBM and nanotechnology

Scientists have been striving to "see" and manipulate atoms and molecules to extend human knowledge and push the frontiers of manufacturing capabilities to the nanometer regime. IBM has been a pioneer in nanoscience and nanotechnology ever since the development of the scanning tunneling microscope in 1981 by IBM Fellows Gerd Binnig and Heinrich Rohrer at IBM Research - Zurich. For this invention, which made it possible to image individual atoms and later on to manipulate them, Binnig and Rohrer were awarded the Nobel Prize in Physics in 1986. The AFM, an offspring of the STM, was invented by Binnig in 1986. The STM is widely regarded as the instrument that opened the door to the nanoworld. A new facility for world-class collaborative nanoscale research, the Nanoscale Exploratory Technology Laboratory, will open in 2011 on the campus of IBM Research - Zurich. The nanotech center is part of a strategic partnership in nanotechnology with ETH Zurich, one of Europe's premier technical universities.

The scientific paper entitled "

SOURCE IBM
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