Nano peel-off fabrication pattern with polymer overcoat layer on glassy carbon electrodes for Pt electrodeposition |
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Authors: | Akira Kishi Minoru Umeda |
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Institution: | aDepartment of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan |
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Abstract: | This article describes a new technique for fabricating an electrocatalyst model in which the particle size and interparticle distance are controlled independently. We designed a uniform insulating polymer layer as a mask on an electroconductive glassy carbon substrate and then peeled off a part of the layer in nano-sized dots by scratching the overcoat layer using an atomic force microscope (AFM) cantilever. Pt particles electrodeposited only on the peeled off area of the glassy carbon. To peel-off a small area on the glassy carbon, a 29 ± 2 nm thick insulating polymer overcoat layer and a cantilever operating area of 10 nm × 10 nm were used, and the smallest peel-off area obtained was 30 nm × 30 nm. Thereafter, we performed the peel-off procedure on the polymer overcoat layer of the glassy carbon substrate having a cantilever operating area of 80 nm × 80 nm. Pt deposition of 100–150 nm in diameter was successfully achieved by adjusting the interparticle distance. |
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Keywords: | Nano peel-off pattern fabrication Pt electrodeposition Glassy carbon electrode Polymer overcoat layer and atomic force microscopy |
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