Design and Self Assembly of Conjugated Oligomers for Electronic Device Applications
Yale University New Haven United States
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The primary motivation for exploring the electronic properties of polymers is the possibility of combining the processability and mechanical properties of polymers plastics with interesting and possibly novel electrical properties. When a carrier is transported through a conducting polymer film, it travels along the polymer chains, and between chains the interchain component of the transport limits the bulk mobility. If one can isolate a single chain of the polymer, this component may be eliminated thus much higher mobilities may be achieved. Ideally, one would like to place a well defined polymer chain designed for optimum electrical performance between two electrodes in complete isolation.to allow for full characterization of its electrical properties. This thesis describes work toward the implementation of a single molecule device. The synthesis and characterization of highly specialized molecules oligomers is presented data on our experimental system are discussed within the theoretical construct. The experimental system relies on a thermodynamically driven self ordering process to self-assemble the long conjugated oligomers to a gold surface. The assembly has been studied to achieve the oriented arrangement of single functional molecules. Coupling and attachment of a molecule to the macroscopic world was pursued through the microfabrication of sub- I0 nm gap electrodes. The process developed to deposit the difunctionalized oligomers and electrically address a single molecule is described.
- Polymer Chemistry
- Electricity and Magnetism