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首页> 外文期刊>Applied optics >Thermal cycling and the optical and electrical characterization of self-assembled multilayer Nile Blue A-gold thin films
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Thermal cycling and the optical and electrical characterization of self-assembled multilayer Nile Blue A-gold thin films

机译：自组装多层尼罗河蓝A-金薄膜的热循环和光电特性

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Some laser applications produce high power densities that can be dangerous to equipment and operators. We have fabricated thin-film coatings by using molecular electrostatic self-assembly to create a spectrally selective absorbing coating that is able to withstand thermal fluctuations from -20 deg C to 120 deg C. We made the thin-film coatings by alternating deposition of an organic dye and gold colloidal nanoparticles onto glass substrates. Nile Blue A perchlorate, with a maximum absorbance slightly above 632 nm, was chosen as the organic dye. Strong coupling between the dye molecules and the gold nanoparticles provides a redshift that increases as the film's thickness is increased. The incorporation of the gold colloidal nanoparticles also decreases the resistivity of the film. The resistivity of the film was measured with a four-point probe and found to be approx10 OMEGA/cm for the two samples measured. Atomic-force microscopy was used to show that film thickness increased 2.4 nm per bilayer. The optical properties of the film were measured at the end of every 5 thermal cycles from -20 deg C to 120 deg C, and negligible degradation was observed after 30 cycles.
机译：某些激光应用会产生高功率密度，这可能对设备和操作员造成危险。我们使用分子静电自组装技术制造了薄膜涂层，以创建能够承受-20℃至120℃的热波动的光谱选择性吸收涂层。有机染料和金胶体纳米粒子到玻璃基板上。选择最大吸收率略高于632 nm的尼罗河蓝高氯酸盐作为有机染料。染料分子与金纳米颗粒之间的强耦合提供了红移，该红移随着膜厚度的增加而增加。金胶态纳米颗粒的结合也降低了膜的电阻率。用四点探针测量膜的电阻率，发现对于两个测量样品，其电阻率约为10 OMEGA / cm。原子力显微镜用于显示每双层膜厚度增加2.4 nm。在从-20℃至120℃的每5个热循环结束时测量膜的光学性质，并且在30个循环之后观察到可忽略的降解。

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