2007 Fiscal Year Final Research Report Summary
Molecular-Wires Heterojunction Created by Precise Electrochemical Polymerization
| Project/Area Number |
18310068
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanostructural science
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| Research Institution | Shizuoka University |
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Principal Investigator |
SAKAGUCHI Hiroshi Shizuoka University, RESEARCH INSTITUTE OF ELFCTRONICS, ASSOCIATE PROFESSOR (30211931)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Molecular Wires / Surface Science / Electrechemistry |
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| Research Abstract |
We report a first visualization of conjugated copolymers which are produced on surfaces with a single-molecular scale. Electrochemical polymerization of two different kinds of thiophene monomers on an iodine-covered gold surface could create the highly assembled conjugated copolymers with different electronic structures in which one part is a flattened polythiophene with low energy gap while other part is a twisted one with high energy gap. Scanning tunneling microscope (STM) clearly captured the snapshots of several linkage types: diblock, triblock and multiblock. Single strand of conjugated copolymers exhibited an anomalous swinging motion on surface. This technique presents the possibility of understanding the copolymerization process from the different monomers with a single-molecular scale, and also building a single-molecular superlattice on a surface using controlled electropolymerization.
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