Washington Pentagonal tiles pave the way towards organic electronics
May 9, 2011
Measurements for a new class of organic thin film used for nanoscale self-assembly of organic building blocks for ultra-small electronics have been reported by an interdisciplinary team at the University of Cambridge and Rutgers University.
In this new class of organic thin film, cyclopentadienyl molecules (C5H5) receive significant electronic charge from the surface, yet diffuse easily across the surface and show interactions with each other that are much weaker than would typically be expected for the amount of charge transferred.
The key to the unique behavior of cyclopentadienyl lies in its pentagonal (five-fold) symmetry, which prevents it latching onto any one site within the triangular (three-fold) symmetry of the copper surface through directional covalent bonds, the researchers said.
This leaves it free to move easily from site to site. At the same time, its internal electronic structure is just one electron short of an extremely stable “aromatic” configuration, encouraging a high degree of charge transfer from the surface and creating a strong non-directional ionic bond.
Source: http://goo.gl/hoiTK
May 9, 2011
Measurements for a new class of organic thin film used for nanoscale self-assembly of organic building blocks for ultra-small electronics have been reported by an interdisciplinary team at the University of Cambridge and Rutgers University.
In this new class of organic thin film, cyclopentadienyl molecules (C5H5) receive significant electronic charge from the surface, yet diffuse easily across the surface and show interactions with each other that are much weaker than would typically be expected for the amount of charge transferred.
The key to the unique behavior of cyclopentadienyl lies in its pentagonal (five-fold) symmetry, which prevents it latching onto any one site within the triangular (three-fold) symmetry of the copper surface through directional covalent bonds, the researchers said.
This leaves it free to move easily from site to site. At the same time, its internal electronic structure is just one electron short of an extremely stable “aromatic” configuration, encouraging a high degree of charge transfer from the surface and creating a strong non-directional ionic bond.
Source: http://goo.gl/hoiTK
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