Conservation and Science, Rijksmuseum Amsterdam, PO Box 74888, 1070 DN Amsterdam, The Netherlands.
Synchrotron SOLEIL, 91192 Gif-Sur-Yvette, France.
J Synchrotron Radiat. 2021 Nov 1;28(Pt 6):1858-1864. doi: 10.1107/S1600577521009450. Epub 2021 Nov 3.
X-ray absorption and optical luminescence can both provide valuable but very different information on the chemical and physical properties of materials. Although it is known that the spectral characteristics of many materials are highly heterogeneous on the micro- and/or nanoscale, no methodology has so far been shown to be capable of spatially resolving both full X-ray absorption and X-ray excited optical luminescence (XEOL) spectra on the nanoscale in a correlative manner. For this purpose, the scanning transmission X-ray microscope at the HERMES beamline of the SOLEIL synchrotron was equipped with an optical detection system capable of recording high-resolution XEOL spectra using a 40 nm soft X-ray probe. The functionality of the system was demonstrated by analyzing ZnO powder dispersions - showing simultaneously the X-ray linear dichroism and XEOL behavior of individual submicrometric ZnO crystallites.
X 射线吸收和光学发光都可以提供关于材料化学和物理性质的有价值但非常不同的信息。尽管已知许多材料的光谱特征在微观和/或纳米尺度上具有高度不均匀性，但迄今为止还没有一种方法能够以相关的方式在纳米尺度上空间分辨全 X 射线吸收和 X 射线激发的光学发光（XEOL）光谱。为此，SOLEIL 同步加速器 HERMES 光束线上的扫描透射 X 射线显微镜配备了一个光学检测系统，该系统能够使用 40nm 的软 X 射线探针记录高分辨率的 XEOL 光谱。该系统的功能通过分析 ZnO 粉末分散体得到了验证，同时显示了单个亚微米 ZnO 晶体的 X 射线线二色性和 XEOL 行为。
