Characterization of vacuum ultraviolet-irradiated surface modification of CoO(111) crystal by low-energy atom scattering spectroscopy
Characterization of vacuum ultraviolet-irradiated surface modification of CoO(111) crystal by low-energy atom scattering spectroscopy
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DOI：
10.1116/6.0001971
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发表时间：
2022-12
期刊：
影响因子：
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通讯作者：
G. Tan;H. Fukuta;K. K. H. De Silva-K.;A. Matsuda;M. Yoshimura;M. Yoshimoto;K. Umezawa
中科院分区：
文献类型：
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作者：
G. Tan;H. Fukuta;K. K. H. De Silva-K.;A. Matsuda;M. Yoshimura;M. Yoshimoto;K. Umezawa
CoO（111）单晶的表面用波长为172 nm的真空紫外（VUV）光处理而不进行热处理。利用低能原子散射光谱研究了CoO（111）在真空紫外光辐照前后的表面结构。原束能量为3 keV-4 He 0，用微通道板探测器探测Co原子后向散射的4 He粒子。实验结果表明，在真空紫外光照射下，岩盐型CoO（111）表面转变为尖晶石型Co 3 O 4（111）表面。我们还确定了详细的化学性质和最顶层的CoO（111）表面的真空紫外光照射前后。
The surface of a CoO(111) single crystal was treated with vacuum ultraviolet (VUV) light at a wavelength of 172 nm without heat treatment. We studied the surface structural analysis of CoO(111) before and after VUV light irradiation in air using low-energy atom scattering spectroscopy. The primary beam was 3 keV-4He0, and backscattered 4He particles from Co atoms were detected using a microchannel plate detector. We compared the experimental spectra to simulation results, and the results demonstrated that the rock-salt CoO(111) surface was transformed to a spinel Co3O4(111) surface after VUV light irradiation. We also identified details about the chemical properties and topmost layers of CoO(111) surfaces before and after VUV light irradiation.