UV-Vis-NIR Absorption Spectrometer

紫外-可见-近红外吸收光谱仪

• 批准号: 421984-2012
• 负责人: Adronov, Alex
• 金额: $ 10.8万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=495697
• 关键词: UV; Vis; NIR; Absorption; Spectrometer

Many nanoscale materials and macro-molecular assemblies, including quantum dots, carbon nanotubes, and conjugated polymers, exhibit photophysical properties that make them valuable for a variety of applications, such as in telecommunications, diagnostics, and sensors. The creation of substances that absorb, process, and emit light at different wavelengths allows control over optical signals that transmit information, enable detection of analytes, or identify the nature of a chemical species. As an example, commercially produced carbon nanotubes are mixtures of multiple nanotube types, which range in conductivity properties from semiconducting to metallic. Each of these nanotube types exhibits a unique and characteristic photophysical signature that can be measured and recorded. By knowing the photophysical signatures of nanotube samples, it is possible to identify the nanotube present and whether treatment or purification procedures are effective in isolating specific nanotube types that are useful for sensory or diagnostic applications. Identification of nanotube types requires the measurement of their light absorption spectrum in the ultraviolet, visible, and near infrared (UV-Vis-NIR) region of the electromagnetic spectrum, which covers a wavelength range of 200 to 2000 nm. Currently, there is no instrument capable of such measurements at McMaster University, which significantly hampers and delays the progress and publications of over 70 researchers within 8 research groups in the faculties of science and engineering. This application therefore requests a spectrophotometer that is capable of precisely measuring light absorption in the UV-Vis-NIR region of the electromagnetic spectrum. This instrument is in dire need by a number of research groups, and will enable numerous studies that are currently impossible at McMaster.

许多纳米级材料和大分子组装体，包括量子点、碳纳米管和共轭聚合物，表现出物理学性质，使它们在各种应用中具有价值，例如在电信、诊断和传感器中。 吸收、处理和发射不同波长的光的物质的产生允许控制传输信息的光学信号，使得能够检测分析物或识别化学物质的性质。 例如，商业生产的碳纳米管是多种纳米管类型的混合物，其导电性能范围从半导体到金属。 这些纳米管类型中的每一种都表现出可以测量和记录的独特和特征性的电子物理特征。 通过了解纳米管样品的生物物理特征，可以识别存在的纳米管以及处理或纯化程序是否有效地分离用于传感或诊断应用的特定纳米管类型。 纳米管类型的识别需要测量其在电磁光谱的紫外、可见和近红外（UV-Vis-NIR）区域中的光吸收光谱，其覆盖200至2000 nm的波长范围。 目前，麦克马斯特大学没有能够进行这种测量的仪器，这严重阻碍和延迟了科学和工程学院8个研究小组内70多名研究人员的进展和出版物。 因此，本申请要求一种能够精确测量电磁光谱的UV-Vis-NIR区域中的光吸收的分光光度计。 许多研究小组迫切需要这种仪器，它将使许多目前在麦克马斯特不可能进行的研究成为可能。