The proposition has been made and is now gaining popular acceptance that electron energy-loss spectroscopy (EELS) attached to a transmission electron microscope (TEM) can be used to semiquantitatively measure H in minerals-specifically, that there is a pre-peak to the O K edge near 530 eV ...
EFTEM和电子能量损失谱(EELS)表征进一步研究了制备得到的直立石墨烯样品中元素的成键情况(图3)。结果表明通过N,O掺杂的均匀引入可以使直立石墨烯拥有与少层石墨烯类似的电子结构状态;于此同时,对C K-edge,N K-edge和O K-edge谱图进...
3 Details of the large-area O-K edge EELS map. a, STEM-HAADF image displaying the sample geometry near the region we have performed EELS mapping. b, The same prepeak map as Fig. 3e. The black, blue, and red rectangles select representative regions with strong, medium, and weak pre...
a) α-Fe2O3 的晶体结构(来自 ICSD 数据库);棕色和蓝色球分别表示 Fe 和 O。e-g) STEM 图像和相应的 EDS 元素图;h-i) Fe 2p 和 O 1 s 的 XPS 数据;j) Fe L-edge EELS 线扫描(插图为用于 EELS 测量的 HAADF-STEM 图像)和 Fe2O3电极的 Tauc 图及其 UPS(k-l);m) 紫外可见光数据;n) ...
Ti and O K edges for titanium oxides by multiple scattering calculations: Comparison to XAS and EELS spectra 来自 Semantic Scholar 喜欢 0 阅读量: 93 作者:ZY Wu,G Ouvrard,P Gressier,CR Natoli 摘要: Theoretical simulations and interpretations of x-ray-absorption near-edge data at the Ti and ...
3 Details of the large-area O-K edge EELS map. a, STEM-HAADF image displaying the sample geometry near the region we have performed EELS mapping. b, The same prepeak map as Fig. 3e. The black, blue, and red rectangles select representative regions with strong, medium, and weak pre...
当氟离子插入超出 x > 2 时,F Kedge 光谱(图 4c)的前边缘区域表现出一个小峰,可归因于金属-氟键,其强度随着 x 的增加而增加,表明形成了 Mn−钙钛矿块中的 F 键得到 STEM-EELS 的支持(图 2c)。为了研究Mn 3d− F 2p杂...
当氟离子插入超出 x > 2 时,F Kedge 光谱(图 4c)的前边缘区域表现出一个小峰,可归因于金属-氟键,其强度随着 x 的增加而增加,表明形成了 Mn−钙钛矿块中的 F 键得到 STEM-EELS 的支持(图 2c)。为了研究Mn 3d− F 2p杂化轨道中空穴形成的可能性,我们通过第一性原理计算计算了LaSr2Mn2O7F2的部分...
在归一化 Fe K 边 X 射线吸收近边结构(XANES,图 S19)光谱中,反应后 Na-ZnFe@C 催化剂的吸收边向更高能量移动,这也验证了反应后 Na-ZnFe@C 催化剂中铁物种的价态高于反应后 Na-ZnFe 催化剂,Fe物种是相对更缺电子的。 Figure 3. (a) EELS spectra of marked regions in HAADF-STEM images of the ...
However, there are only few works related to the O K-edge in 5d TMO compounds (NaxWO3 [3] and WO3 [4], [5], [6]) which were performed using electron energy loss spectroscopy (EELS). Recently we have reported the results of high-resolution O K-edge XAS experiments using synchrotron ...