Abstract
Metal-vapor deposition on polymer surfaces has been used in a variety of fields such electronics, food packing, and decorations. Polydimethylsiloxane (PDMS) is one of the widely used polymers. We studied a metal-deposition modulation phenomenon on a thermocurable PDMS. The metal atoms were easy to desorb from the uncured PDMS surface than from the cured surface. Furthermore, some metal atoms on the uncured surface were absorbed into the film and generated intrinsic color, which origins was suggested due to the size of metal nanoparticles. It was revealed that the differences in metal-deposition properties depended on the chain mobility of PDMS; uncured PDMS chains were in a high mobility state, while the cured PDMS surface had low mobility because of cross-linked chains. On the surface with high mobility molecules, metal atoms were easy to desorb and hard to nucleate due to the low density of metal atoms. Potential applications of metal-deposition modulation on thermocurable PDMS surfaces were proposed: three-dimensional metal-vapor integration, a mirror with no electronic conductance, and various colored Au patterns prepared with maskless vacuum deposition. These processes are simple one and any substrates including solid, flexible, flat, or curved can be used, and therefore, would be applied to a variety of fields.
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This work was partially supported by JSPS KAKENHI under Grant No. 21K05214.
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MD: Methodology, Investigation, Validation, Writing the original draft. TT: Conceptualization, Methodology, Validation, Verification.
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Dohi, M., Tsujioka, T. Metal-vapor atom behavior on thermocurable polydimethylsiloxane films. Appl. Phys. A 128, 606 (2022). https://doi.org/10.1007/s00339-022-05745-0
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DOI: https://doi.org/10.1007/s00339-022-05745-0