Molecular wire
The conductance follows typical power law behavior as a function of temperature or electric field, whichever is the greater, arising from their strong one-dimensional character.
Numerous theoretical ideas have been used in an attempt to understand the conductivity of one-dimensional systems, where strong interactions between electrons lead to departures from normal metallic (Fermi liquid) behavior.
For example, a simple oligo (phenylene ethylnylene) type molecular wire (B) was synthesized starting from readily available 1-bromo-4-iodobenzene (A).
The synthesis of Mo6S9−xIx was performed in sealed and vacuumed quartz ampoule at 1343 K. In Mo6S9−xIx, the repeat units are Mo6S9−xIx clusters, which are joined together by flexible sulfur or iodine bridges.
Complex shapes have been demonstrated, but unfortunately metal coated DNA which is electrically conducting is too thick to connect to individual molecules.
Unfortunately manufacturing CNTs with pre-determined properties is impossible at present, and the functionalized ends are typically not conducting, limiting their usefulness as molecular connectors.
Possible routes for the construction of larger functional circuits using Mo6S9−xIx MWs have been demonstrated, either via gold nanoparticles as linkers, or by direct connection to thiolated molecules.
MoSI wires have been made in such composites, relying on their superior solubility within the polymer host compared to other nanowires or nanotubes.
It has been recently proposed that twisted nanowires could work as electromechanical nanodevices (or torsion nanobalances) to measure forces and torques at nanoscale with great precision.
