Volume contraction of monohydric alcohols interrogated by planar Bragg grating sensor
Volume contraction of monohydric alcohols interrogated by planar Bragg grating sensor
复制标题
平面布拉格光栅传感器检测一元醇的体积收缩
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Hellmann
中科院分区：
文献类型：
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作者：
M. Girschikofsky;S. Scheurich;S. Belle;R. Hellmann
抽象的。我们报告了平面布拉格光栅传感器对体积收缩一元醇溶液混合物的物理观察。通过倏逝场相互作用，传感器检测传感器表面上与折射率变化相关的液体化合物成分的任何变化。通过研究各种一元醇的水溶液，我们发现分析物的折射率与其混合比之间存在非线性关系，表明溶液中混合相的不同性质以及体积收缩的影响。分析甲醇、乙醇和 2-丙醇的水溶液揭示了较小一元醇分子的折射率的局部最大值，随着醇链中碳原子数的增加，该折射率向较高醇含量的方向移动。反过来，该传感器可用于在线监测和观察酒精水溶液（包括体积收缩溶液）中的水含量。
Abstract. We report on the physical observation of mixtures of volume contractional monohydric alcohol solutions interrogated by a planar Bragg grating sensor. Via evanescent field interaction, the sensor detects any changes of the composition of a liquid compound on the sensor surface that are associated with a change of the refractive index. Studying various aqueous solutions of monohydric alcohols, we found a nonlinear relationship of the analytes refractive index on its mixing ratio, indicating the different nature of the mixed phases in the solution and the effect of volume contraction. Analyzing aqueous solutions of methanol, ethanol, and 2-propanol reveals a local maximum of the refractive index for the application of smaller monohydric alcohol molecules, which is displaced in the direction of a higher alcohol content with an increasing number of carbon atoms in the chain of the alcohols. In turn, this sensor can be used for the online monitoring and observation of the water content in aqueous alcohol solutions, including volume contractional solutions.