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首页> 外文期刊>Applied Spectroscopy: Society for Applied Spectroscopy >Development of a Planar Array Infrared Reflection Spectrograph for Reflection-Absorption Spectroscopy of Thin Films at Metal and Water Surfaces
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Development of a Planar Array Infrared Reflection Spectrograph for Reflection-Absorption Spectroscopy of Thin Films at Metal and Water Surfaces

机译：用于金属和水表面薄膜反射吸收光谱的平面阵列红外反射光谱仪的研制

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Planar array infrared (PA-IR) spectroscopy offers several advantages overFourier transform infrared (FT-IR) methods, including ultrafast speed (<100 (mu)s temporal resolution) and excellent sensitivity. However, obtaining spectra in the range of 1800 to 1000 cm~(-1) of films at the air-water interface remains difficult due to the poor IR reflectivity of water, the extremely low concentration of the thin film on the water subphase, and the interference of water bands. In this study, we report a new planar array infrared reflection spectrograph (PA-IRRS), which has several advantages over concentional approaches. This instrument can record sample and reference spectra simultaneously with an instrumental setup that is the same as that of a single-beam instrument by splitting the incident infrared beam into two sections on a plane mirror (H) or a water trough. With this design, the instrument can accommodate large infrared accessories, such as a water trough, without a loss of infrared beam intensity. Water bands can be subtracted to obtain a high-quality spectrum for poly(L-lactic acid) Langmuir film on the water subphase with a resolution of about 6 cm~(-1) in 10.8 s. Hence, this PA-IRRS system has great potential for investigating the time-resolved dynamics of a broad range of Langmuir films, such as cellular membranes or biopolymers, on the water subphase.
机译：与傅立叶变换红外（FT-IR）方法相比，平面阵列红外（PA-IR）光谱具有多个优势，包括超快速度（<100μs的时间分辨率）和出色的灵敏度。然而，由于水的红外反射率差，水在亚相上的薄膜浓度极低，以及在水-水界面处获得在1800-1000 cm〜（-1）范围内的薄膜的光谱仍然很困难。水带的干扰。在这项研究中，我们报告了一种新的平面阵列红外反射光谱仪（PA-IRRS），它比集中式方法具有多个优势。通过将入射的红外光束分成平面镜（H）或水槽上的两个部分，该仪器可以使用与单光束仪器相同的仪器设置同时记录样品和参考光谱。通过这种设计，该仪器可以容纳大型红外附件，例如水槽，而不会损失红外束强度。可以减去水带，以在水子相上获得高质量的聚（L-乳酸）Langmuir膜光谱，其分辨率为10.8 s约6 cm〜（-1）。因此，该PA-IRRS系统具有很大的潜力，可用于研究水亚相上各种Langmuir膜（例如细胞膜或生物聚合物）的时间分辨动力学。

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