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Optical properties of ZnO:SiO2:Tb3+ films: the effect of DNA
Laser Physics Letters ( IF 1.4 ) Pub Date : 2021-02-06 , DOI: 10.1088/1612-202x/abdecc
E A Boruleva 1 , G K Chudinova 1, 2 , I A Hayrullina 3 , I A Nagovitsyn 2, 4 , A V Khoroshilov 5 , A V Lobanov 4
Affiliation  

Thin films of zinc oxide and those doped with terbium (at concentrations of 0.1–5.0 mol%) were synthesized on glass substrates using the sol–gel method. The UV–Vis transmission spectra showed that transparency increases from 60% to 86% with an increase of Tb content. All terbium-doped samples exhibit a rise in Eg from 3.37 eV for zinc oxide to 3.827 eV for doped films. The photoluminescence (PL) of zinc oxide doped with terbium in the UV (260 nm) region and the fluorescence of terbium in the visible region (330 nm) were studied. The intensity of green luminescence with an increase in the amount of terbium increases by an average of 6%. The yield of green fluorescence relative to PL also goes up with an increase in the concentration of terbium concentration of terbium from 5% to 7.4%. DNA deposited on the surface of the plate extinguishes PL by an average of 5.5% and has a weak effect (<3%) on terbium fluorescence in the visible region. SEM images without DNA consist of spherical structures—0.5–2.0 μm in diameter, assembled in the form of pentagons. The presence of DNA on the surface is expressed as ‘stars’ of white color of regular and irregular shapes, located on the surface inside these pentagons.



中文翻译:

ZnO:SiO 2:Tb 3+薄膜的光学性质:DNA的影响

使用溶胶-凝胶法在玻璃基板上合成了氧化锌薄膜和掺杂ter的薄膜(浓度为0.1-5.0 mol%)。UV-Vis透射光谱表明,随着Tb含量的增加,透明度从60%增加到86%。所有ter掺杂样品的Eg值都从氧化锌的3.37 eV升高到掺杂膜的3.827 eV。研究了紫外(260 nm)区域掺do的氧化锌的光致发光(PL)和可见光区域(330 nm)掺of的荧光。green含量增加时,绿色发光强度平均增加6%。相对于PL,绿色荧光的产率也随着with浓度的增加从of浓度的5%增加到7.4%。沉积在平板表面上的DNA可使PL平均熄灭5.5%,并且对可见区域中的fluorescence荧光产生微弱的影响(<3%)。没有DNA的SEM图像由球形结构组成–0.5–2.0μ直径米,在五边形的形式组装。DNA在表面上的存在表示为规则和不规则形状的白色“星”,位于这些五边形内部。

更新日期:2021-02-06
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