Significantly improved adhesion of poly(3,4-ethylenedioxythiophene) nanofilms to amino-silane monolayer pre-patterned SiO2 surfaces.
This study reports a novel patterning method for highly pure poly(3,4-ethylenedioxythiophene) (PEDOT) nanofilms having a particularly strong adhesion to a SiO2 surface. An oxidized silicon wafer substrate was micro-contact printed with n-octadecyltrichlorosilane (OTS) monolayer, and subsequently its negative pattern was self-assembled with three different amino-functionalized alkylsilanes, (3-aminopropyl)trimethoxysilane (APS), N-(2-aminoethyl)-3-aminopropyltrimethoxy silane (EDAS), and (3-trimethoxysilylpropyl) diethylenetriamine (DETS). Then, PEDOT nanofilms were selectively grown on the aminosilane pre-patterned areas via the vapor phase polymerization method. To evaluate the adhesion and patterning, the PEDOT nanofilms and SAMs were investigated with a Scotch tape test, contact angle analyzer, optical and atomic force microscopes. The evaluation revealed that the newly developed bottom-up process can successfully offer a strongly adhered and selectively patterned PEDOT nanofilm on an oxidized Si wafer surface.
Center for Materials and Processes of Self-Assembly, School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea.
Ilsun
I
Pang
Sungsoo
S
Kim
Jaegab
J
Lee
D000268:Adhesiveness; D000327:Adsorption; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties
D019086:Bridged Bicyclo Compounds, Heterocyclic; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D011108:Polymers; D012821:Silanes; C121383:poly(3,4-ethylene dioxythiophene)