Metal-vapor atom behavior on thermocurable polydimethylsiloxane films
Metal-vapor atom behavior on thermocurable polydimethylsiloxane films
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DOI：
10.1007/s00339-022-05745-0
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发表时间：
2022-06
期刊：
影响因子：
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通讯作者：
Megumi Dohi;T. Tsujioka
中科院分区：
文献类型：
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作者：
Megumi Dohi;T. Tsujioka
聚合物表面金属气相沉积技术已广泛应用于电子、食品包装、装饰等领域。聚二甲基硅氧烷（PDMS）是应用广泛的聚合物之一。我们研究了一种热固化PDMS上的金属沉积调制现象。金属原子从未固化的PDMS表面比从固化表面更容易脱附。此外，未固化表面上的一些金属原子被吸收到膜中并产生本征颜色，这可能是由于金属纳米颗粒的尺寸引起的。结果表明，PDMS分子链的迁移率决定了金属沉积性能的差异，未固化的PDMS分子链处于高迁移率状态，而固化后的PDMS表面由于分子链的交联而迁移率较低;在高迁移率分子表面，由于金属原子密度较低，金属原子容易脱附，难以成核。提出了金属沉积调制在热固化PDMS表面上的潜在应用：三维金属-蒸气集成，无电子电导的反射镜，以及用无掩模真空沉积制备的各种彩色Au图案。这些方法是简单的，并且可以使用包括固体、柔性、平坦或弯曲的任何基底，因此，将应用于各种领域。
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.