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Vapor Phase Polymerized PEDOT Thin Film on EDOT Seeded Substrate & Microcontact Printed PEDOT
Keywords: PEDOT, Self Assembly Monolayer, Film
Poly (3,4-ethylenedioxythiophene) (PEDOT) is a flexible, transparent, highly conductive and low-cost organic material. Therefore, PEDOT thin film electrode and patterned PEDOT electrode are of great interest for both industrial and academic applications. We have been developing new strategies to grow PEDOT thin films and pattern PEDOT by microcontact printing on trimethoxysilane functionalized 3,4-ethylenedioxythiophene (EDOT)[1] grafted glass substrates. The grafted molecule, trimethoxysilane functionalized EDOT, was synthesized and characterized by 1H-NMR spectrum. The glass substrate was grafted with this functionalized EDOT to form a self-assembled monolayer and was characterized by the change in water contact angle. Vapor phase polymerization method[2] was used to grow PEDOT on the EDOT grafted substrate. Recent results demonstrated that the EDOT grafted substrate resulted in improved adhesion and conductivity of PEDOT (Cl-) thin films on substrate. The conductivity was calculated by sheet resistance and film thickness, which were characterized by standard 4-probe method and atomic force spectroscopy (AFM) respectively. The adhesion between PEDOT and substrate was characterized by scotch tape tests. In addition to microcontact printing of PEDOT, micro ribbon arrays with the width of 1 μm have been successfully fabricated.
Boxiao Li,
Binghamton University
Vestal, NEW YORK

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