Wavelength-dispersive X-Ray fluorescence spectrometer

该提案的目的是为杜伊斯堡-埃森大学化学系配备高性能波长色散X射线荧光光谱仪（WD-RFA），以进一步扩大和利用该大学在纳米科学和纳米材料基础和应用研究方面的卓越成就。通过固体纳米复合材料和薄膜样品以及液体纳米颗粒胶体获得的元素组成的非破坏性定量代表了我们教师科学生活中的一个重大挑战。主要研究领域包括功能性生物材料的合成和开发，光学领域的无机多金属合金纳米材料（SFB 1242）和磁性，定制纳米颗粒胶体和复合材料用于增材制造（SPP 2122）和非均相催化剂的基础研究（SFB / TR 247）。现有的非破坏性方法，如EDX、EELS、AES或XPS，灵敏度有限（> 100 ppb），因此不适用于痕量分析以及液体样品。反过来，替代的定量方法如ICP-OES / -MS或AAS要求至少定性地知道组成，以便应用定制的样品制备方法（包括破坏性样品消解），包括耗时的微波消解。因此，材料成分的研究只能在小样本规模上进行，与样本损失相关，并且只能实现间接的成分相关性。本提案中描述的WD-RFA的性能概况旨在确保对固体和液体纳米材料进行无损分析，即使在成分未知的情况下也可以进行痕量（低至1 ppb）分析以及高样品通量分析。因此，在化学系内，拟议的WD-RFA将提供一个有价值的工具，用于在材料成分和测量的固有材料特性以及应用相关参数之间进行迫切需要的直接相关性。

The aim of this proposal is to equip the Faculty of Chemistry of the University of Duisburg-Essen with a high-performance wavelength-dispersive X-ray fluorescence spectrometer (WD-RFA) in order to further expand and utilize the University's excellence in fundamental and applied research on nanoscience and nanomaterials. The non-destructive quantification of the elemental composition obtained by solid nanocomposites and thin-film samples as well as liquid nanoparticle colloids represents a major challenge in the scientific life of our faculty. The main research areas range from the synthesis and development of functional biomaterials to inorganic multi-metallic alloy nanomaterials in the field of optics (SFB 1242) and magnetism towards tailor-made nanoparticle colloids and composites for additive manufacturing (SPP 2122) and fundamental research on heterogeneous catalysts (SFB / TR 247). Already available non-destructive methods such as e.g. EDX, EELS, AES or XPS have only limited sensitivity (> 100 ppb) and are therefore not suitable for trace analysis as well as liquid samples. In turn, alternative quantitative methods such as ICP-OES / -MS or AAS, require that the composition is at least qualitatively known in order to apply a tailored sample preparation method (including destructive sample digestion) including time-consuming microwave digestion. Consequently, a study of the material composition is only possible on a small sample scale, is associated with a loss of sample and enables only indirect composition-related correlations. The performance profile of the WD-RFA described in this proposal is designed to ensure a non-destructive analysis of solid and liquid nanomaterials, possible in trace amounts (down to 1 ppb) even in case of unknown composition as well as high sample throughput. Within the Faculty of Chemistry, the proposed WD-RFA will hence provide a valuable tool to carry out urgently needed direct correlations between the material composition and measured intrinsic material properties as well as application-related parameters.