Negative Ion Conversion of Neutral Oxygen Atoms under Grazing Scattering from a LiF(100) Surface

2020 ◽  
Vol 124 (33) ◽  
pp. 18054-18062
Author(s):  
Zewen Zong ◽  
Hu Zhou ◽  
Bo Jin ◽  
Xin Zhang ◽  
Guangyi Wang ◽  
...  
Keyword(s):  
Negative Ion ◽  
Grazing Scattering ◽  
Oxygen Atoms

scholarly journals Negative ion formation by neutral hydrogen atom grazing scattering from a LiF(100) surface

RSC Advances ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 4489-4498
Author(s):  
Bo Jin ◽  
Hu Zhou ◽  
Zewen Zong ◽  
Xin Zhang ◽  
Guangyi Wang ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Neutral Hydrogen ◽  
Negative Ion ◽  
Electron Loss ◽  
Ion Formation ◽  
Grazing Scattering ◽  
Surface Image ◽  
Image State

H− conversion during H0 grazing scattering on a LiF(100) surface, includes H− affinity electron loss to a surface image state.

Unexpected Negative-Ion Conversion in Grazing Scattering of Negative Ions on HOPG

2021 ◽  
Author(s):  
Xinyue Guo ◽  
Pinyang Liu ◽  
Bin Ding ◽  
Luyao Zhang ◽  
Jiawei Wang ◽  
...  
Keyword(s):  
Negative Ions ◽  
Negative Ion ◽  
Grazing Scattering

Catalytic CO Oxidation on Unreconstructed Cu(110) by Reactive As-Adsorbed Oxygen Atoms below 230 K

1996 ◽  
Vol 100 (3) ◽  
pp. 1048-1054 ◽  
Author(s):  
Tsuyoshi Sueyoshi ◽  
Takehiko Sasaki ◽  
Yasuhiro Iwasawa
Keyword(s):  
Co Oxidation ◽  
Adsorbed Oxygen ◽  
Catalytic Co Oxidation ◽  
Oxygen Atoms

Modification of optical properties of PC-PBT/Cr2O3 and PC-PBT/CdS nanocomposites by gamma irradiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20402
Author(s):  
Kaoutar Benthami ◽  
Mai ME. Barakat ◽  
Samir A. Nouh
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Color Difference ◽  
Band Gap Energy ◽  
Polybutylene Terephthalate ◽  
Γ Irradiation ◽  
Gap Energy ◽  
Vis Spectroscopy ◽  
Oxygen Atoms

Nanocomposite (NCP) films of polycarbonate-polybutylene terephthalate (PC-PBT) blend as a host material to Cr2O3 and CdS nanoparticles (NPs) were fabricated by both thermolysis and casting techniques. Samples from the PC-PBT/Cr2O3 and PC-PBT/CdS NCPs were irradiated using different doses (20–110 kGy) of γ radiation. The induced modifications in the optical properties of the γ irradiated NCPs have been studied as a function of γ dose using UV Vis spectroscopy and CIE color difference method. Optical dielectric loss and Tauc's model were used to estimate the optical band gaps of the NCP films and to identify the types of electronic transition. The value of optical band gap energy of PC-PBT/Cr2O3 NCP was reduced from 3.23 to 3.06 upon γ irradiation up to 110 kGy, while it decreased from 4.26 to 4.14 eV for PC-PBT/CdS NCP, indicating the growth of disordered phase in both NCPs. This was accompanied by a rise in the refractive index for both the PC-PBT/Cr2O3 and PC-PBT/CdS NCP films, leading to an enhancement in their isotropic nature. The Cr2O3 NPs were found to be more effective in changing the band gap energy and refractive index due to the presence of excess oxygen atoms that help with the oxygen atoms of the carbonyl group in increasing the chance of covalent bonds formation between the NPs and the PC-PBT blend. Moreover, the color intensity, ΔE has been computed; results show that both the two synthesized NCPs have a response to color alteration by γ irradiation, but the PC-PBT/Cr2O3 has a more response since the values of ΔE achieved a significant color difference >5 which is an acceptable match in commercial reproduction on printing presses. According to the resulting enhancement in the optical characteristics of the developed NCPs, they can be a suitable candidate as activate materials in optoelectronic devices, or shielding sheets for solar cells.

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