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Title: | Electrochemical syntheses and self-assembly of nanostructure as modified electrodes for polythiophene preparation | Authors: | ZHANG CHUNYAN | Keywords: | Conducting polymer; Polythiophene; Gold nanoparticle; Self-assembled monolayer; Modified electrode; Coulomb staircase | Issue Date: | 9-Oct-2003 | Citation: | ZHANG CHUNYAN (2003-10-09). Electrochemical syntheses and self-assembly of nanostructure as modified electrodes for polythiophene preparation. ScholarBank@NUS Repository. | Abstract: | This dissertation is mainly concerned with the study of derivatized polybithiophenes preparation using self-assembled monolayer technique and novel electrochemistry. This study proposes four approaches to improve electrical, optical properties and stability of polybithiophenes: 1) BF3??OEt2 used as electrolytic solvent can significantly improve polymer properties by lowering the oxidation potential; 2) Thienylthiolate compound modified electrode can function as a chemical link to allow chemisorption of polymers in a ordered way; 3) Gold nanoparticle modified electrode shows microelectrode feature and polymers obtained display more orientated structure and extended conjugation; 4) Polythiophene / nonaqueous gold nanoparticle complex can be obtained by electropolymerization of monomer and Au nanoparticle mixture. The resulting polymer / metal nanoparticle complex displays exceptional environmental stability in its conductive state. Meanwhile, gold nanoparticles with a series of thienylthiolates monolayer protection are prepared and studied, which demonstrate a solvent-gated electrochemical ensembled Coulomb staircase feature. | URI: | http://scholarbank.nus.edu.sg/handle/10635/13451 |
Appears in Collections: | Ph.D Theses (Open) |
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