In the present study, low-angle ADF-STEM is successfully employed to image the molecular crystal structure of hexadecachloro-Cu-phthalocyanine (Cl 16-CuPc), an organic molecule. The structures of CuPc derivatives (polyhalogenated CuPc with Br and Cl) are determined quantitatively using the same ...
aAn ADF-STEM image acquired at 100 kV.b,cClassification of atom columns by applying GMM to integrated intensities of all atom columns. W dopants and Te vacancies (1 or 2 Te atoms missing) are labeled on top of the Gaussian-smoothed image ofa.dImage of atomic coordinates derived fromb.e,...
Atomic-resolution ADF STEM observations of a GaN crystal were performed using the new objective lens system combined with the higher-order aberration corrector. The aberration corrector was situated between the electron gun and the objective lens so as to correct the lens aberrations of the probe-fo...
Beam sensitive materials difficult to observe with standard ADF and ABF STEM methods can be easily analyzed with higher contrast at a wide range of magnifications. K. Ooe, T. Seki, et al., Ultramicroscopy 220, 113133 (2021) STEM Low Dose Imaging...
Processing steps for locating and fitting 2-D Gaussians to every atomic column in a perovskite oxide using STEM-ADF and STEM-ABF data acquired with the electron beam parallel to the [11¯0] direction Full size image An example of a typical STEM image is shown in Fig.1(top left). The...
(ADF) STEM micrographs allows a relatively straightforward interpretation of images in terms of atomic positions, where a bright spot is an atomic column, almost irrespective of sample thickness.50,51 In the intervening decade since these early AC-STEM instruments were introduced, further developments...
⑥Science Advances:Targeting ABCA12-controlled ceramide homeostasis inhibits breast cancer stem cell function and chemoresistance 靶向ABCA12控制的神经酰胺稳态抑制癌症干细胞 (CSC) 的脂质代谢途径并克服耐药性 DOI: 10.1126/sciadv.adh1891 ⑦FcRn抗体巴托利单抗(HBM9161)已在国内撤回用于全身型重症肌无力(gMG)的...
For this algorithm, the accuracy and precision with which measurements for the atomic column positions and scattering cross-sections from annular dark field (ADF) STEM images can be estimated, is investigated. The highest attainable precision is reached even for low dose images. Furthermore, ...
Because of its strong dependence on the atomic number Z , ADF can be used to identify the chemical type of individual atoms, both heavy and light. We review the instrumental requirements for atomic resolution imaging at 60keV and lower energies, and we illustrate the kinds of studies that ...
ADF STEM\nAtomic resolution\nCrystalline defects\nLow angle annular dark-fieldWhile traditional high-resolution STEM is performed by exclusively collecting electrons which have been scattered to high angles (i.e., HAADF), the present contribution will focus on small-angle scattered electrons, as in...