Article
Optics
Anjani Kumar, R. K. Shukla, Rajeev Gupta
Summary: A conventional thermal evaporation technique was used to prepare thin films of Se40As60_ySy (y = 0, 10, 20) chalcogenide materials, and their optical characterization was analyzed in the wavelength range of 600-2700 nm. The optical band gap was found to increase with the addition of sulfur (S), which was attributed to coordination number and chemical bond energy. The outcomes of optical characterization suggested the potential of the glassy system as optical materials.
Article
Chemistry, Physical
Guanglu Lei, Zishuo Li, Guocai Lu, Jinyuan Hu, Haochuan Shang, Xiaolei Zhang, Xianghong Liu, Jun Zhang, Xiangxin Guo
Summary: Metal oxide semiconductor (MOS) thin films, especially tungsten oxide (WO3) thin films, have shown great potential as sensing layers for gas sensor devices. This study focuses on the deposition and annealing process of WO3 thin films on interdigital electrodes, and explores the impact of oxygen vacancies on sensor properties. The results indicate that the WO3 sensor annealed at 500 degrees C exhibits the best performance in detecting triethylamine (TEA), which is attributed to the enhanced adsorption of oxidative oxygen species due to the presence of abundant oxygen vacancies.
JOURNAL OF MATERIOMICS
(2022)
Article
Multidisciplinary Sciences
C. Breazu, M. Socol, N. Preda, O. Rasoga, A. Costas, G. Socol, G. Petre, A. Stanculescu
Summary: The use of 2D nanostructured transparent conductive electrode can influence the morphological, structural, optical and electrical properties of nucleobases thin films, affecting both optical (transmission and emission) properties and electrical properties through modifications at the organic/electrode interface. These results suggest potential applications in green optoelectronic devices.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Phung Dinh Hoat, Van Khoe Vo, Sung-Hoon Bae, Hyo-Jun Lim, Dang Thi Huong Thao, Pham Tien Hung, Nguyen Manh Hung, Nguyen Van Hoang, Joon-Hyung Lee, Young -Woo Heo
Summary: An effective ammonia sensor was developed using a CsPbBr3 thin film prepared directly by dual-source thermal evaporation. The sensor exhibited good selectivity toward ammonia gas at room temperature, with high responsivity (958% at 10 ppm) and low detection limit (250 ppb). It also showed good reversibility, repeatability, and fast response/recovery times (12/16 s). The effect of humidity on the sensor's performance was investigated, and the ammonia-sensing mechanism of the CsPbBr3 film was proposed and discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
O. Surucu, M. Isik, M. Terlemezoglu, T. Bektas, N. M. Gasanly, M. Parlak
Summary: CuSbSe2 thin film was prepared by co-evaporation, and its structural, morphological, and optical properties were investigated. The film exhibited an orthorhombic crystalline structure with a nearly uniform surface. The optical analysis showed a small band gap energy and a room temperature direct band gap.
Article
Materials Science, Ceramics
Sema Kurtaran, Gokhan Kilic, Shams A. M. Issa, H. O. Tekin
Summary: A group of novel CeO2 thin films were synthesized using ultrasonic spray pyrolysis process. The composition ratios of these films were modified to investigate changes in their optical, surface, electrical, and structural characteristics. The films exhibited promising properties for optoelectronic and nuclear security applications, with high resistivity and potential for nuclear radiation shielding.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
A. M. Adam, A. K. Diab, Mohamed Tolan, Z. M. H. El-Qahtani, A. A. Refaat, Medhat A. El-Hadek, E. M. Elsehly, A. El-Khouly, Abdulaziz N. Alharbi, V Khovaylo, M. Ataalla
Summary: Thin layers of (Bi2Se3)(1-x)(Bi2Te3)(x) samples were prepared by vacuum thermal evaporation technique. The structure properties and optical properties of the synthesized films were characterized and discussed. The films exhibited growing transparency and varying optical band gap energy beyond the visible light region, and the incorporation of Bi2Te3 enhanced the light transmission in layered bismuth chalcogenides.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
R. A. Almotiri, A. F. Qasrawi, Sabah E. Al Garni
Summary: In this study, thin films of magnesium selenide were grown on glass substrates using vacuum deposition. The films exhibited polycrystalline structure and high dielectric constant, making them suitable for applications in near-infrared and ultraviolet ranges. Additionally, the films showed high plasmon frequency and terahertz cutoff frequency.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Kamal Kayed, Mayada Issa, Esaaf Alsoki
Summary: This paper investigates the band gap properties of Ag/Ag2O composites formed through oxygen plasma treatment of silver thin films as well as the band gap properties of silver nanostructures within these composites. The band gap of silver nanoparticles is calculated based on unique luminescence spectra features, which characterize the various structures of silver nanoparticles in the prepared Ag/Ag2O composites. The experimental results demonstrate the formation of energy bands of silver nanoparticles within the energy band structure of the prepared films. Distinguished energy gaps are found for both individual silver nanoparticles and larger silver nanoparticles based on the observed luminescence spectra features, and the energy gap of individual silver nanoparticles is not significantly affected by the size of the silver oxide particles or the power of the oxygen plasma.
Article
Engineering, Electrical & Electronic
U. Chalapathi, Alla Subba Reddy, P. Reddy Prasad, G. Manjula, Sambasivam Sangaraju, Rajesh Cheruku, Bandar Ali Al-Asbahi, Salh Alhammadi, C. Parthasaradhi Reddy, Krithikaa Mohanarangam, B. Purusottam Reddy, Si-Hyun Park
Summary: This study reports the fabrication and characterization of AgSbS2 thin films, which showed different phase structures at different sulfurization temperatures. The optical and electrical properties of the films were analyzed. AgSbS2 solar cells were also fabricated, exhibiting a certain level of efficiency. However, the device processing conditions need further optimization.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Physics, Condensed Matter
A. M. Adam, Mohamed Tolan, A. A. Refaat, Ayman Nafady, P. Petkov, M. Ataalla
Summary: Thin films of Bi2Te3 alloy were grown on non-conductive glass substrates using VTE and PLD techniques, with XRD and AFM used to study crystalline structure and surface morphology. Optica properties were characterized using a Jasco spectrophotometer, with absorption coefficient, extinction coefficient, refractive index, and optical band gap determined. Film parameters were compared between the two growth methods.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Materials Science, Ceramics
Jia Zheng, Lei Ye, Manduo He, Duyi He, Yuelong Huang, Jian Yu, Tao Chen
Summary: Amorphous silicon carbide (SiC) thin films were successfully deposited at room temperature using the e-beam evaporation technique, with material composition controlled by adjusting the e-beam current. The films exhibited optical bandgaps in the range of 1.7-2.3 eV and conductivity values between 10(-6)-10(-4) S/cm, showing great potential for applications in solar cells.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Electrical & Electronic
Amjad Salamah M. Aljaloud, A. F. Qasrawi, Latifah Hamad Khalid Alfhaid
Summary: This study focuses on the thermal deposition of amorphous and stoichiometric CrSe2 thin films, which show promising characteristics for application in 6G and terahertz technology.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Ahmed Saeed Hassanien
Summary: This article focuses on the study of the linear and nonlinear optical characteristics of thermally evaporated a-CuxGe20-xSe40Te40 thin films. Measurements and analyses of optical constants, potentials, and oscillator models were conducted to investigate the effects of different Cu ratios on the film properties. The article also discusses other important optoelectrical and dielectric parameters.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Wenqing Song, Tao Li, Lei Zhang, Wenhui Zhu, Liancheng Wang
Summary: The influence of growth parameters such as N-2/Ar mixture, sputtering pressure, and growth time on InxAl1-xN films was investigated. The optimal growth parameters were found to be 18sccm N-2 flow rate, 1 Pa pressure, and 60 min growth time, leading to improved film properties. The study provides insights into the relationship between growth parameters and physical properties of the films, with implications for future applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Mahmoud Abd El Aleem Ali Ali El-Remaily, Ahmed M. M. Soliman, Mohamed E. Khalifa, Nashwa M. El-Metwaly, Amerah Alsoliemy, Tarek El-Dabea, Ahmed M. Abu-Dief
Summary: New thiazole complexes were synthesized from Cu (II), Fe (III), and Pd (II) ions, with a focus on the beneficial catalytic activity of ARPTPd in mild conditions for the synthesis of dihydrotetrazolo[1,5-a]pyrimidine derivatives. The advantages of using green solvent, shorter reaction time, and high product yield were highlighted, along with the superior performance of ARPTPd compared to other catalysts.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Ahmed M. Elsayed, Mahmoud Abd El Aleem Ali Ali El-Remaily, Kaoud S. M. Salama, Antar A. Abdelhamid
Summary: A one-pot synthetic method for [(3-cyano-5-phenyl-1H-pyrrol-2-yl)sulfanyl]acetic acids with excellent yield was developed using TBAB catalyzed reaction under phase transfer catalysis conditions. The synthesized compounds showed good in vitro antibacterial and antifungal activities, especially exhibiting strong inhibitory effects against the E. coli MurB enzyme.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Antar A. Abdelhamid, Kaoud S. M. Salama, Ahmed M. Elsayed, Mohamed A. Gad, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: In this study, a series of biologically active pyrrole derivatives were synthesized and tested for their toxicological characteristics against Spodoptera littoralis and cotton leafworm. Compounds 6a, 7a, 8c, and 3c showed the highest insecticidal bioefficacy.
Article
Biochemistry & Molecular Biology
Moumen S. Kamel, Amany Belal, Moustafa O. Aboelez, E. Kh Shokr, H. Abdel-Ghany, Hany S. Mansour, Ahmed M. Shawky, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: Novel pyrrolo [2,3-b] pyrrole derivatives with hypolipidemic and antimicrobial activities were synthesized and evaluated. Compounds 5 and 6 exhibited significant hypolipidemic effects, making them promising candidates for anti-atherosclerotic and hypolipidemic properties. Compound 2 showed moderate activity against Pseudomonas aeruginosa, while compound 3 demonstrated good antimicrobial activity against Staphylococcus aureus. These derivatives also displayed good anticancer activity against three tested cell lines.
Article
Biochemistry & Molecular Biology
Moustafa O. Aboelez, Moumen S. Kamel, Amany Belal, Ahmed El Badry Abdel-Aziz, Mohammed A. S. Abourehab, H. Abdel-Ghany, Mohamed A. El Hamd, Mahmoud Abd El Aleem Ali El-Remaily
Summary: In this study, new compounds were successfully synthesized and evaluated for their antimicrobial and anticancer activities. Compound 3 exhibited the most potent anticancer and anti-EGFR activities, while compound 2 showed the highest antioxidant activity. Moreover, compounds 2, 6, 7, and 8 were found to be the safest compounds.
MOLECULAR DIVERSITY
(2023)
Article
Materials Science, Multidisciplinary
Mahmoud Abd El Aleem Ali Ali El-Remaily, Moumen S. Kamel, Shimaa Abdel Halim, E. Kh Shokr, H. Abdel-Ghany, Hesham Hamad
Summary: A new characteristic with inexpensive preparation tools and best application performance has been achieved by using novel heterocyclic dyes. These compounds, synthesized through catalyzed condensation reaction and azo coupling, exhibit good adhesive properties and uniform thin films. The optical spectra reveal large direct band gaps, indicating potential applications in energy conversion.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Hany M. Abd El-Lateef, Mahmoud A. A. A. El-Remaily, A. Khodairy, Marwa M. Sayed, Nasr Yehia, Mai M. Khalaf, Kamal Aly
Summary: Novel unsaturated polyesters based on indazole moiety in the main chain were synthesized by interfacial poly-condensation. The copolyesters were characterized and analyzed by different techniques, including FTIR, 1H-NMR, XRD, TGA, and SEM. The synthesized copolyesters exhibited good thermal stability and morphology. They were also utilized as catalysts in the preparation of polysubstituted imidazoles and showed remarkable inhibition properties against mild steel corrosion in hydrochloric acid.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Sanaa A. Ahmed, Moumen S. Kamel, Moustafa O. Aboelez, Xiang Ma, Ahmed A. Al-Karmalawy, Sayed A. S. Mousa, Elders Kh. Shokr, H. Abdel-Ghany, Amany Belal, Mohamed A. El Hamd, Zafer S. Al Shehri, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: In this study, novel derivatives of 3,4-diaminothieno[2,3-b]thiophene-2,5-dicarbonitrile were synthesized and analyzed. The compounds showed high cytotoxicity against MCF-7 and A549 cell lines, outperforming the reference standards erlotinib. Compound 2 exhibited the strongest activity against both forms of EGFR and also had the best antioxidant property. Molecular docking research was conducted to study the mechanism of action, and in silico tests were performed to explain the physicochemical features.
Article
Chemistry, Applied
Ahmed M. Abu-Dief, Musa A. Said, Omar Elhady, Hessah A. Al-Abdulkarim, Seraj Alzahrani, Thomas Nady A. Eskander, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: A simple and highly tunable BSI ligand was synthesized, along with three new coordinating substances. The structures of these compounds were clarified using various spectroscopic and analytical methods. The thermal degradation behavior of the BSI complexes was investigated, and their antibacterial and anticancer properties were evaluated.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Ahmed M. Abu-Dief, Musa A. Said, O. Elhady, Nadiyah Alahmadi, Seraj Alzahrani, Thomas Nady A. Eskander, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: A new class of bio-active Pd(II), Ni(II) and Fe(III) complexes were synthesized using the guanidine-based ligand (BSG). The structural characteristics were validated by various analytical techniques and the complexes were evaluated for their anticancer, antioxidant, antibacterial, and antifungal activities. Among them, the Pd(II) complex showed significant anticancer activity in MCF-7 breast carcinoma cells.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Mahmoud Abd El Aleem Ali Ali El-Remaily, Tarek El-Dabea, Rafat M. El-Khatib, Aly Abdou, Mohamed A. El Hamd, Ahmed M. Abu-Dief
Summary: Three GUBZCu, GUBZVO, and GUBZPd chelates were synthesized and characterized in terms of their molecular formula, stability constant, and catalytic performance. The results confirmed the promising catalytic activity and selectivity of these chelates in environmentally friendly synthesis reactions.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Ahmed M. Abu-Dief, Rafat M. El-Khatib, Tarek El-Dabea, Aly Abdou, Faizah S. Aljohani, Eida S. Al-Farraj, Ibrahim Omar Barnawi, Mahmoud Abd El Aleem Ali Ali El-Remaily
Summary: New medicinally active chelates were synthesized from Cu(II), VO(II), Ag(I), and Pd(II) ions using the N-(1H-Benzoimidazol-2-yl)-guanidine (BIG) ligand. The compounds were characterized using various techniques and theoretical studies were conducted to identify important features. The chelates exhibited good stability in solution and showed promising biological activities, including antimicrobial, antioxidant, and anticancer properties. These results suggest that the studied chelates have the potential to be used as bioactive agents.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Mahmoud Abd El Aleem Ali Ali El-Remaily, O. Elhady, Aly Abdou, Dalal Alhashmialameer, Thomas Nady A. Eskander, Ahmed M. Abu-Dief
Summary: We established new imidazole complexes using Pd2+, Fe3+, and Ni2+ ions, with the exception of the Pd (II) chelate (BIL-Pd) which has a square-planer configuration, the octahedral geometry was recommended for the other examined complexes. The condensation reaction of three components resulted in the synthesis of 5-amino-2-oxo-3,7-dihydro2H-pyrano[2,3-d]thiazole-6-carbonitrile derivatives under controlled and environmentally friendly conditions. The BIL-Pd complex showed effectiveness as a recyclable and promising heterogeneous solid catalyst.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Organic
Eman A. Ahmed, Ahmed Khodairy, Mahmoud Abd El Aleem Ali Ali El-Remaily, Abdelraheem M. Ahmed
Summary: New compounds were synthesized through Claisen-Schmidt condensation reaction and multistep reaction or one-pot three-component condensation reaction. The use of environmentally friendly solvents and optimized reaction conditions resulted in high yields and high efficiency.
CURRENT ORGANIC CHEMISTRY
(2022)