Effect of [Li]/[Nb] ratios on segregation coefficient and dopant occupancy of In:Yb:Nd:LiNbO3 crystals

2019 ◽  
Vol 33 (13) ◽  
pp. 1950160
Author(s):  
Li Dai ◽  
Yu Shao ◽  
Xianbo Han ◽  
Chunrui Liu ◽  
Luping Wang
Keyword(s):  
Transmission Spectrum ◽  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Czochralski Method ◽  
Atomic Emission ◽  
Threshold Concentration ◽  
Segregation Coefficient ◽  
Plasma Atomic Emission ◽  
Inductively Coupled ◽  
Ir Transmission

A series of [Formula: see text] crystals with various [Li]/[Nb] ratios (0.946, 1.05, 1.20 and 1.38) were grown by the Czochralski method. They were analyzed by inductively coupled plasma atomic emission spectroscopy (ICP-AES). As the [Li]/[Nb] ratio increases in the melt, the segregation coefficients of [Formula: see text] and [Formula: see text] ions increase, while the segregation coefficient of [Formula: see text] ions decrease. The [Li]/[Nb] ratio in the crystal of sample [Formula: see text] is 0.996, which is near stoichiometric. The dopant occupancy with different [Li]/[Nb] ratios was analyzed by IR transmission spectrum and UV-VIS-NIR spectrum. When the [Li]/[Nb] ratio reaches 1.20, the absorption peak at [Formula: see text] indicates that the threshold concentration of [Formula: see text] is 1 mol.% in the sample [Formula: see text].

scholarly journals Arsenoplatin-Ferritin Nanocage: Structure and Cytotoxicity

2021 ◽  
Vol 22 (4) ◽  
pp. 1874
Author(s):  
Giarita Ferraro ◽  
Alessandro Pratesi ◽  
Damiano Cirri ◽  
Paola Imbimbo ◽  
Daria Maria Monti ◽  
...  
Keyword(s):  
Biological Activity ◽  
Diffraction Data ◽  
Inductively Coupled Plasma ◽  
Emission Spectroscopy ◽  
Atomic Emission ◽  
Side Chain ◽  
Plasma Atomic Emission ◽  
Average Amount ◽  
X Ray ◽  
Inductively Coupled

Arsenoplatin-1 (AP-1), the prototype of a novel class of metallodrugs containing a PtAs(OH)2 core, was encapsulated within the apoferritin (AFt) nanocage. UV-Vis absorption spectroscopy and inductively coupled plasma-atomic emission spectroscopy measurements confirmed metallodrug encapsulation and allowed us to determine the average amount of AP-1 trapped inside the cage. The X-ray structure of AP-1-encapsulated AFt was solved at 1.50 Å. Diffraction data revealed that an AP-1 fragment coordinates the side chain of a His residue. The biological activity of AP-1-loaded AFt was comparatively tested on a few representative cancer and non-cancer cell lines. Even though the presence of the cage reduces the overall cytotoxicity of AP-1, it improves its selectivity towards cancer cells.

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