Acta Physica Polonica A最新文献_第5页

Dynamic Viscosity of Some Lubricants in Terms of Local Nano-Void Fraction 从局部纳米空隙率看某些润滑剂的动态粘度

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.180

F. Sahin-Dinc

引用次数: 0

Photoactivity of Dopped TiO₂ Thin Films by Ion Sputter Deposition 离子溅射沉积掺杂TiO2薄膜的光活性

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.144

A. Gjevori, B. Ziberi

{"title":"Photoactivity of Dopped TiO<sub>2</sub> Thin Films by Ion Sputter Deposition","authors":"A. Gjevori, B. Ziberi","doi":"10.12693/aphyspola.144.144","DOIUrl":"https://doi.org/10.12693/aphyspola.144.144","url":null,"abstract":"Titanium dioxide is well known as a photoactive material to be activated under ultraviolet irradiation and is either employed as a photocatalyst or exhibits superhydrophilic behavior after reducing the surface energy under illumination for self-cleaning or anti-fogging surfaces. For increasing the reactivity of the thin ﬁlms under solar illumination, a reduced band gap is desired. Doping with transition metals or with nitrogen has been reported in the literature. However, the incorporation of nitrogen into the growing ﬁlm is a much more complex process, which is presently not completely understood. TiO 2 thin layers were produced by ion beam sputter deposition, which should allow the usage of temperature-sensitive substrates. The deposition has been performed in the existing experimental setup, previously used for investigations on Ag and Ge thin ﬁlm physical vapor deposition processes, where the inﬂuence of the sputtered and reﬂected particles and their accompanying energy ﬂux on the grain size, surface morphology, and conductivity have been measured. By adjusting the geometry between the incident ion beam, the sputter target, and the substrate, independently from the primary ion energy and species, a controlled deposition of samples was possible. Conventional ion implantation was employed to implant either carbon or nitrogen ions below the surface for bandgap engineering. The resulting thin ﬁlms have subsequently been investigated for optical properties, stoichiometry, structural properties, surface topography, and photoactivity. The aim was to ﬁnd an optimized geometry and to determine the exact particle and energy ﬂux necessary for these conditions. Thus, the process opens up for transfer or scaling when assuming future industrial applications.","PeriodicalId":7164,"journal":{"name":"Acta Physica Polonica A","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135686641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Weyl Nodes in Ferromagnetic Weyl Semimetal 铁磁Weyl半金属中的Weyl节点

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.197

U.P. Tyagi, P. Goswami

引用次数: 0

C2/c-C32: A New Superhard sp³ Carbon Allotrope with Direct Band Gap 具有直接带隙的新型超硬sp3碳同素异形体C2/c-C32

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.150

R. Yao, X. Jia, X. Zhu, M. Zhang, Q. Wei

引用次数: 0

Studying Alpha Irradiated CR39 Using Positron Annihilation Spectroscopy 用正电子湮没光谱研究α辐照CR39

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.163

S. Limam, A. Guittoum, Z. Lounis-Mokrani, M. Hemous, N. Bendjedda

{"title":"Studying Alpha Irradiated CR39 Using Positron Annihilation Spectroscopy","authors":"S. Limam, A. Guittoum, Z. Lounis-Mokrani, M. Hemous, N. Bendjedda","doi":"10.12693/aphyspola.144.163","DOIUrl":"https://doi.org/10.12693/aphyspola.144.163","url":null,"abstract":"The monitoring of the alpha irradiation eﬀect on the microstructural deformation of CR39 via the variation of free volumes has been studied. CR39 samples have been irradiated with alpha particles at ﬂuencies Φ of 2 . 6 × 10 8 , 5 . 27 × 10 8 , 7 . 91 × 10 8 , 1 . 3 × 10 9 , 1 . 84 × 10 9 , and 3 . 6 × 10 9 α/ cm 2 . The samples have been investigated with positron annihilation lifetime spectroscopy and Doppler broadening spectroscopy. The analysis of positron annihilation spectra has shown a variation of the ortho-positronium component τ 3 and the parameters S and W as a function of the ﬂuence Φ . This variation is related to a change in the size and number of free volumes, which is created via the evolution of chemical chains. From the values of τ 3 , the free volume radius has been estimated using the Tao–Eldrup model. Moreover, theoretical calculation of the radial dose distribution has been also performed using the Waligorski formulation to get the track core radius. After an etching of 5 min, the positron annihilation spectroscopy technique was again used to investigate the microstructural changes in etched samples subjected to alpha radiation. A clear variation of τ 3 , S and W parameters, and free volume radius has been noted when compared to the non-etched samples. topics:","PeriodicalId":7164,"journal":{"name":"Acta Physica Polonica A","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135686637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, Spectroscopic Characterization and DFT Calculations of a Novel Lanthanum Complex of Ferrocenyl Dithiophosphonate 新型二茂铁二硫代膦酸镧配合物的合成、光谱表征及DFT计算

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.154

A. Aydin, B. Dede

引用次数: 0

Theoretical Model of a New Type Tunneling Transistor 一种新型隧道晶体管的理论模型

4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-09-01 DOI: 10.12693/aphyspola.144.137

P. Pfeffer

{"title":"Theoretical Model of a New Type Tunneling Transistor","authors":"P. Pfeffer","doi":"10.12693/aphyspola.144.137","DOIUrl":"https://doi.org/10.12693/aphyspola.144.137","url":null,"abstract":"A tunneling transistor without heterojunction as a theoretical design, or more precisely controlled electron current transmission by barrier potential, is under consideration. The electrons from the conduction band of the source tunnel through the forbidden gap $E_g$ of the channel to the conduction band of the drain. The tunneling current $J$ calculations made at helium temperature for the example InAs-InAs-InAs, Au-GaSe-Au and Al-AlN-Al structures show that for a constant source-drain voltage, $V_C$, of several mV, changes in the gate voltage, $V_G$, applied to the channel within the voltage range of 0 - $E_g/$2e change $J$ by even 10 orders of magnitude. Unlike the existing solutions such as tunnel field-effect-transistor (TFET), the proposed device uses the change of $V_G$ (gate voltage), i.e. the change of the electrostatic potential in the channel, to modify the imaginary wave vector $k_z$ of tunnel current electrons. Consequently, the gate voltage controls the damping force of the electrons wave functions and thus the magnitude of the tunneling current, $J$. The effect of increasing temperature, T, on $J(V_G)$ relation was also tested. It was found that only in structures with a wide forbidden channel gap this effect is insignificant (at least up to T=300 K).","PeriodicalId":7164,"journal":{"name":"Acta Physica Polonica A","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135686642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First Principle Exploration of (K, Rb)(Al, Si)O3 Perovskites: Structural, Elastic, Anisotropic, Electronic, and Lattice Dynamical Properties (K, Rb)(Al, Si)O3钙钛矿的第一性原理研究:结构、弹性、各向异性、电子和晶格动力学性质

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-08-01 DOI: 10.12693/aphyspola.144.99

Ü. Bayhan, İ. Yilmaz

引用次数: 0

Confined Ground State of Beryllium Atom and Its Isoelectronic Ions 铍原子及其等电子离子的限制基态

IF 0.7 4区物理与天体物理

Acta Physica Polonica A Pub Date : 2023-08-01 DOI: 10.12693/aphyspola.144.63

S. Doma, G. D. Roston, M.F. Ahmed, K.D. Sen

引用次数: 0

Modeling of Cr3+-Doped Cs2CdCl4 Single Crystal Cr3+掺杂Cs2CdCl4单晶的建模