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首页> 外文期刊>Vibrational Spectroscopy: An International Journal devoted to Applications of Infrared and Raman Spectroscopy >Ultralow concentration ^-carotene molecule detection by liquid-core optical fiber resonance Raman spectroscopy
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Ultralow concentration ^-carotene molecule detection by liquid-core optical fiber resonance Raman spectroscopy

机译：Ultralow浓度^ -Carotene分子检测液体光纤共振拉曼光谱

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Liquid-core optical fiber-based resonance Raman scattering (LCOF-RRS) that can enhance Raman intensity 10~9 times has been used to measure P-carotene in CS2 with the concentration ranging from 10~(-7) to 10~(-16) M. The 514.5 nm excited resonance Raman spectra (v1 band) of P-carotene superimposed on a fluorescence background are clearly distinct. The corresponding Raman scattering cross sections (RSCS) were evaluated by comparing the intensity of LCOF-RRS with the intensity of solution fluorescence of P-carotene. Due to the resonance Raman effect and dilution effect, the RSCS enhances remarkably and is comparable with the fluorescence cross section of P-carotene. This work shows that ultralow concentration molecules can be detected by the LCOF-RRS technique. The extreme sensitivity attainable and related structure information of molecule detected by the LCOF-RRS make it a potential analytical tool at ultralow concentration.
机译：基于液体光纤的共振拉曼散射（LCOF-RRS）可以增强拉曼强度10〜9次，用于测量CS2中的p-carotene，浓度为10〜（-7）至10〜（ - 16）M.叠加在荧光背景上的p-carotene的514.5 nm激发共振拉曼（V1带）显然是不同的。 通过将LCOF-RRS的强度与P-胡萝卜素的溶液荧光强度进行比较来评估相应的拉曼散射截面（RSC）。 由于共振拉曼效应和稀释效果，RSCs显着增强，与P-胡萝卜素的荧光横截面相当。 该工作表明，可以通过LCOF-RRS技术检测超级浓度分子。 LCOF-RRS检测到的分子的极端敏感性和相关结构信息使其成为超级浓度的潜在分析工具。

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