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Ion track template technique for fabrication of ZnSe2O5 nanocrystals
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ( IF 1.4 ) Pub Date : 2020-05-13 , DOI: 10.1016/j.nimb.2020.04.039
A. Akilbekov , A. Akylbekova , A. Usseinov , A. Kozlovskyi , Z. Baymukhanov , Sh. Giniyatova , A.I. Popov , A. Dauletbekova

ZnSe2O5 nanocrystals with an orthorhombic structure were synthesized by electrochemical deposition into a-SiO2/n-Si ion track template formed by 200 MeV Xe ion irradiation with the fluence of 107 ions/cm2. The lattice parameters determined by the X-ray diffraction and calculated by the CRYSTAL computer program package are very close to each other. It was shown that ZnSe2O5 has a direct band gap of 2.8 eV at the Γ-point. In addition, the calculated charge distribution and chemical bonds show that the crystal has an ion-covalent nature. The photoluminescence excited by photons at 300 nm has a low intensity arising mainly due to zinc and oxygen vacancies.



中文翻译:

离子轨道模板技术用于制备ZnSe 2 O 5纳米晶体

通过电化学沉积到200 MeV Xe离子辐照形成的a-SiO 2 / n-Si离子径迹模板中,以10 7离子/ cm 2的注量合成了具有正交晶结构的ZnSe 2 O 5纳米晶体。由X射线衍射确定并由CRYSTAL计算机程序包计算的晶格参数彼此非常接近。结果表明,ZnSe 2 O 5在Γ点的直接带隙为2.8 eV。另外,计算出的电荷分布和化学键表明该晶体具有离子共价性质。由300 nm的光子激发的光致发光强度较低,这主要是由于锌和氧空位引起的。

更新日期:2020-05-13
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