Atomic And Molecular Wires
There is a growing interest in the connection of a single molecule or a wire of atomic diameter between two electrodes. This has led to the investigation of a new class of nanoscale materials: lines of metal atoms of atom-sized cross section, lines of atomic defects, and conjugated oligomers. Several ways to fabricate such materials are discussed, such as the self assembly of metal atoms on a surface under UHV, deposition from or sliding with an STM tip apex, and local surface modification...
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There is a growing interest in the connection of a single molecule or a wire of atomic diameter between two electrodes. This has led to the investigation of a new class of nanoscale materials: lines of metal atoms of atom-sized cross section, lines of atomic defects, and conjugated oligomers. Several ways to fabricate such materials are discussed, such as the self assembly of metal atoms on a surface under UHV, deposition from or sliding with an STM tip apex, and local surface modification using a voltage pulse. The synthesis of molecular wires is also presented, the objective being to produce long, low-gap, rigid conjugated oligomers. The electrical connection of a single atomic or a single molecule is more challenging: Mechanical (break junction) STM or nanolithographic coplanar junctions are currently being used to measure the resistance of a single nanometer-scale wire. The theoretical problems associated with such measurements involve both solid state physics and quantum chemistry. Booknews The May 1996 workshop was sponsored by the Ministry of Scientific Affairs Division special program on Nanoscale Science with the support of the CNRS and the Max Planck Institute. Surface physicists and synthetic chemists present their foremost advances, discussing such topics as using STM to assemble atomic lines atom for atom, to fabricate a mask for such a line or using the wide range of chemical synthesis techniques to obtain long, rigid and conjugated oligomers; planar junction; and transport phenomena like tunnel (off-resonance) transport and Coulomb blockade. Annotation c. by Book News, Inc., Portland, Or.
PrefaceSelf assembling of metal lines on metal surfaces1Self-assembled single atom wide metal lines on Si(001) surfaces11Atomic depassivation and metallization of the Si(100)-2x1:H surface23Controlled manipulation of atoms and molecules and formation of nanostructures with the Scanning Tunneling Microscope31Organic molecular wires: theoretical analysis of the electronic coupling to metal electrodes and of the influence of derivatization47Synthesis for molecular electronics: rigid rods and discs61Synthesis of molecular scale wires and alligator clips81Synthesis of conjugated ladder oligomers89Synthesis of nanowires encapsulated in carbon nanotubes by the arc discharge method99Molecular rectification109Nanopatterning of conducting polymers and conductivity measurements with nanometer-spaced eletrodes119Towards electrical transport on single molecules. First results on nanafabrication and phthalocyanine polymers129Co-planar nanojunction to connect a single molecule139Conductance quantization in metallic nanocontacts: experimental results and novel theoretical aspects149Electrical resistance of one or two atoms159Contacting molecular nanostructures. Molecular mechanics, charge Transfer, and transport properties169Computation of electrostatic fields around carbon tubules biased by an STM junction179A proposal of atom electronics based on atom/molecule switching devices193
\ BooknewsThe May 1996 workshop was sponsored by the Ministry of Scientific Affairs Division special program on Nanoscale Science with the support of the CNRS and the Max Planck Institute. Surface physicists and synthetic chemists present their foremost advances, discussing such topics as using STM to assemble atomic lines atom for atom, to fabricate a mask for such a line or using the wide range of chemical synthesis techniques to obtain long, rigid and conjugated oligomers; planar junction; and transport phenomena like tunnel (off-resonance) transport and Coulomb blockade. Annotation c. by Book News, Inc., Portland, Or.\ \
