Broadband Multipath Spectrometry using High Diffuse Reflectivity Cavities

使用高漫反射腔的宽带多路光谱测量

• 批准号: 1246368
• 负责人: Purnendu Dasgupta
• 金额: $ 19.7万
• 依托单位: University of Texas at Arlington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1246368&HistoricalAwards=false
• 关键词: Broadband; Multipath; Spectrometry; using; Diffuse

In this award, funded by the Chemical Measurement and Imaging Program of the Division of Chemistry, Professor Purnendu Dasgupta of the University of Texas at Arlington and his graduate student researchers will be supported to develop broadband multipath spectrometry using cavities with diffuse but high reflectivity. The key feature of the devices that will be developed is an increase in the effective path-length for absorption achieved by having the light pass through the sample multiple times. In comparison to other multi-path optical methods, the method being developed by Prof. Dasgupta and his students is not reliant upon optically flat surfaces. Spectrometry is a workhorse method for quantitatively measuring the concentration of species in solution. It fails when the analytes of interest are weakly absorbing, when the pathlength through the sample is small, or when the concentration of the absorbing species is very low. Methods like that being developed in this project aim to overcome these problems, thereby increasing the utility of this robust analytical method. The technique being developed in this project can be useful in a number of important applications, including the determination of low levels of contaminants in ultra-high purity water. The students working on this project will gain useful experience in building new kinds of analytical instruments, and they will be well-trained for employment in the science and technology workforce.

该奖项由化学系化学测量和成像项目资助，德克萨斯大学阿灵顿分校的Purnendu Dasgupta教授和他的研究生研究人员将获得支持，使用具有漫反射但高反射率的腔体开发宽带多径光谱法。 将开发的设备的关键特征是通过使光多次穿过样品来实现吸收的有效路径长度的增加。 与其他多路径光学方法相比，Dasgupta教授和他的学生正在开发的方法不依赖于光学平面。 光谱法是定量测量溶液中物质浓度的主要方法。 当感兴趣的分析物弱吸收时，当通过样品的路径长度很小时，或者当吸收物质的浓度很低时，它就失效了。 本项目正在开发的方法旨在克服这些问题，从而提高这种稳健分析方法的实用性。 该项目正在开发的技术可用于许多重要应用，包括超高纯水中低水平污染物的测定。 从事该项目的学生将获得建造新型分析仪器的有用经验，他们将接受良好的培训，以便在科学和技术劳动力中就业。