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首页> 外文会议>Self-Assembly Processes in Materials >In Situ Measurement of the Second Harmonic Signal of Adsorbing Nonlinear Optical Ionically Self-assembled Monolayers
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In Situ Measurement of the Second Harmonic Signal of Adsorbing Nonlinear Optical Ionically Self-assembled Monolayers

机译：吸附非线性光学离子自组装单分子膜的第二谐波信号的原位测量

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摘要

lonically self-assembled monolayers (ISAMs) have recently been shown to spontaneously exhibit a polar ordering that gives rise to substantial second order nonlinear optical response. The deposition of ISAMs has been studied in situ via second harmonic generation. This is a particularly sensitive probe of the growth of nanometer-thick films since the centrosymmetry of the immersion solutions, the substrate, and the container yields no SHG contribution from these bulk components. Upon immersion in the NLO-active polyelectrolyte solution, the SHG rises sharply over the first minute. When a film is immersed into salt water, the SHG decreases significantly only to be restored when the salt solution is replaced with deionized water.
机译：近来已证明，自组装的单分子层（ISAMs）自发地表现出极性有序性，从而引起大量的二阶非线性光学响应。 ISAMs的沉积已通过二次谐波生成进行了现场研究。这是对纳米厚膜生长的特别敏感的探针，因为浸没溶液，基材和容器的中心对称性没有从这些散装组分产生SHG贡献。浸入NLO活性聚电解质溶液后，SHG在第一分钟内急剧上升。当将膜浸入盐水中时，SHG显着降低，只有在用去离子水代替盐溶液后才能恢复。

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