Facta Universitatis - Series: Physics, Chemistry and Technology最新文献_第3页

Structural and optical characterization of aluminum zinc co-doped tin oxide grown by sol-gel spin coating techniques 溶胶-凝胶自旋镀膜技术制备铝锌共掺杂氧化锡的结构和光学特性

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2020-01-01 DOI: 10.2298/FUPCT2002109A

O. Adedokun, I. Bello, O. Adedeji, K. Talabi, O. Olatunji, R. Alasa

{"title":"Structural and optical characterization of aluminum zinc co-doped tin oxide grown by sol-gel spin coating techniques","authors":"O. Adedokun, I. Bello, O. Adedeji, K. Talabi, O. Olatunji, R. Alasa","doi":"10.2298/FUPCT2002109A","DOIUrl":"https://doi.org/10.2298/FUPCT2002109A","url":null,"abstract":"Aluminum Zinc co-doped Tin Oxide (AZSO) thin film was grown by sol-gel spin coating techniques onto a glass substrate using various doping concentrations (0, 2, 4, 6, and 8 wt%) and the effect of doping on each sample were studied using structural analysis; X-ray Diffraction (XRD) pattern, gravimetric method; thin film thickness and UV photo-spectrometer; optical properties. The results of the XRD were revealed that all the peaks have a tetragonal phase of SnO2, which were oriented at the 110, 101, and 211 planes. The film thickness was observed to vary with doping concentration. In the visible region, all the film samples were exhibited at average transmittance. The coefficient of absorption was gradually increased with an increase in photon energy at a certain level with a decrease in the absorption coefficient as the photon energy increases further. At 550-800 nm range of wavelength, a high extinction coefficient (k) was recorded and the refractive index curves show regular dispersion behavior. The optical conductivity of the films followed a similar pattern, which showed that conductivity increased to a peak at 3.60 eV. The energy bandgap of the film samples (AZSO1 - AZSO5) is 4.095 eV, 4.103 eV, 4.087 eV, 4.114 eV, and 4.106 eV, respectively. The studies show that the properties of Al-Zn co-doped SnO2 films can be explored for optoelectronic applications.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89140475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent updates in the development of mettallocenes with antimalarial activity 具有抗疟活性的茂金属化合物的最新进展

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2020-01-01 DOI: 10.2298/FUPCT2001001A

Jelena Aksic, Marija Gencic, N. Radulović

引用次数: 2

Introducing matter fields in model of noncommutative gravity 在非交换引力模型中引入物质场

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-10-25 DOI: 10.2298/fupct1901031d

Marija Dimitrijevic-Ciric, D. Gočanin, N. Konjik, V. Radovanovic

{"title":"Introducing matter fields in model of noncommutative gravity","authors":"Marija Dimitrijevic-Ciric, D. Gočanin, N. Konjik, V. Radovanovic","doi":"10.2298/fupct1901031d","DOIUrl":"https://doi.org/10.2298/fupct1901031d","url":null,"abstract":"Theory founded on SO(2,3)* gauge symmetry. One significant feature of this\u0000 approach is that gravitational field, given by the vierbein, becomes\u0000 manifest only after a suitable gauge fixing and it is formally united with\u0000 other gauge fields. Starting from a model of pure noncommutative gravity, we\u0000 extend it by introducing fermions and Yang-Mills gauge field. Using the\u0000 enveloping algebra approach and the Seiberg-Witten map we construct\u0000 corresponding actions and expand them perturbatively in powers of the\u0000 canonical noncommutativity parameter ???. Unlike in the case of pure\u0000 noncommutative gravity, first non-vanishing noncommutative corrections are\u0000 linear in the noncommutativity parameter and they describe the coupling of\u0000 matter and gauge fields with gravity due to spacetime noncommutativity. This\u0000 is augmented by the fact that some of these corrections pertain even in flat\u0000 spacetime where they induce potentially observable noncommutative\u0000 deformations. We discuss the effects of noncommutativity on electron?s\u0000 dispersion relation in the presence of constant background magnetic field -\u0000 Landau levels. Our results could be useful for further investigation of\u0000 phenothe menological consequences of spacetime noncommutativity.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90451169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the concept of local time 关于当地时间的概念

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-10-16 DOI: 10.2298/fupct1901053j

J. Jeknić-Dugić, M. Dugić, M. Arsenijević

引用次数: 0

Inflationary RSII model with a matter in the bulk and exponential potential of tachyon field 膨胀RSII模型中物质的体积和指数势的速子场

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-04-25 DOI: 10.2298/FUPCT1901079S

M. Stojanovi'c, N. Bili'c, Dragoljub D. Dimitrijevi'c, G. Djordjevic, M. Milovsevi'c

引用次数: 1

Constrained dynamics of tachyon field in FRWL spacetime FRWL时空中速子场的约束动力学

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-04-25 DOI: 10.2298/FUPCT1901021D

M. Dimitrijevi'c, Dragoljub D. Dimitrijevi'c, G. Djordjevic, M. Milovsevi'c

引用次数: 0

Constraining scalar-tensor gravity models by S2 star orbits around the galactic center S2恒星绕银河系中心运行的约束标量张量引力模型

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-04-11 DOI: 10.2298/fupct1901011b

V. Borka-Jovanovic, P. Jovanovi'c, D. Borka, S. Capozziello, S. Gravina, A. D'Addio

引用次数: 6

Comparisons of Quantemol and Morgan LXCat cross section sets for electron-neutral scattering and rate-coefficients: Helium and water Quantemol和Morgan LXCat电子中性散射和速率系数截面集的比较:氦和水

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-01-01 DOI: 10.2298/fupct1902145m

Ž. Mladenović, S. Gocić, Z. Petrović

引用次数: 0

Slow and fast light propagation through ladder-type atomic media with degenerate energy levels 慢速光和快速光在具有简并能级的阶梯型原子介质中的传播

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-01-01 DOI: 10.2298/fupct1902173f

N. Filipović, V. Pavlovic, Ljiljana Stevanović

{"title":"Slow and fast light propagation through ladder-type atomic media with degenerate energy levels","authors":"N. Filipović, V. Pavlovic, Ljiljana Stevanović","doi":"10.2298/fupct1902173f","DOIUrl":"https://doi.org/10.2298/fupct1902173f","url":null,"abstract":"We investigate the weak probe pulse propagation through the atomic medium, in the presence of the strong control laser field, under the regime of the electromagnetically induced transparency (EIT). These fields couple to the medium by forming the 3-level ladder configuration. We focus on two distinct cases: closed system, which is a non-degenerate, and open system, where the middle level is 3-fold degenerate, and the additional levels are coupled to the other levels only via spontaneous emission. The spatio-temporal profile of the probe pulse envelope is obtained by using the formalism of Maxwell-Bloch equations with the help of the Fourier transform method. We study the influence of the control field Rabi frequency, the spectral half-width of the initial pulse and decay rates on the propagation of the probe pulse. Several important pulse parameters are also calculated and discussed. It is shown that the group velocity of light can be controlled in such a manner that one can switch from slow to fast light and vice versa when changing the control Rabi frequency and spectral pulse half-width. Moreover, the possibility of replacing the open with an effective closed system is also discussed.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81629741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ascidian halogen-containing secondary metabolites from the family didemnidae 海鞘含卤素次生代谢物

Facta Universitatis - Series: Physics, Chemistry and Technology Pub Date : 2019-01-01 DOI: 10.2298/fupct1902097d

Miljana Djordjević, N. Radulović

引用次数: 0