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Morphological and SERS Properties of Silver Nanorod Array Films Fabricated by Oblique Thermal Evaporation at Various Substrate Temperatures

机译:斜向热蒸发在不同衬底温度下制备的银纳米棒阵列膜的形貌和SERS特性

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摘要

Aligned silver nanorod (AgNR) array films were fabricated by oblique thermal evaporation. The substrate temperature during evaporation was varied from 10 to 100 °C using a home-built water cooling system. Deposition angle and substrate temperature were found to be the most important parameters for the morphology of fabricated films. Especially, it was found that there exists a critical temperature at ~90 °C for the formation of the AgNR array. The highest enhancement factor of the surface-enhanced Raman scattering (SERS), observed in the Ag films coated with benzenethiol monolayer, was ~6 × 107. Hot spots, excited in narrow gaps between nanorods, were attributed to the huge enhancement factor by our finite-difference time-domain (FDTD) simulation reflecting the real morphology.
机译:通过倾斜热蒸发制备取向的银纳米棒(AgNR)阵列膜。使用自制的水冷系统,蒸发过程中的基板温度在10至100°C之间变化。发现沉积角和衬底温度是制造的膜的形态最重要的参数。特别是,发现存在〜90°C的临界温度以形成AgNR阵列。在涂有苯硫醇单层的Ag膜中观察到的最大表面增强拉曼散射增强因子(SERS)为〜6×10 7 。在纳米棒之间的狭窄缝隙中激发的热点归因于我们反映真实形态的有限差分时域(FDTD)模拟的巨大增强因子。

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