Article
Engineering, Electrical & Electronic
Sukru Cavdar, Yasemin Sahin, Neslihan Turan, Haluk Koralay, Nihat Tugluoglu
Summary: In this study, undoped and Cd-doped ZnO thin films were prepared using the SILAR technique and their structural and electrical properties were analyzed. The results showed that the thin films had a hexagonal wurtzite structure and the electrical properties varied with the amount of Cd dopant. Additionally, p-n junction diode structures were created to study the light sensitivity and photoresponse characteristics of the films. The findings are important for the design and fabrication of photodiodes in optoelectronic applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
S. A. Al-Ghamdi, A. A. A. Darwish, Taymour A. Hamdalla, Ahmed Obaid M. Alzahrani, Syed Khasim, Saleem I. Qashou, K. F. Abd El-Rahman
Summary: This study reports the structural, optical, and electrical properties of TlInSe2 thin films with different thicknesses. The results show that the prepared films are polycrystalline in the Tetragonal system, and the crystalline size increases with the increase of the film's thickness. The optical measurements determine the energy gaps and phonon energy of TlInSe2, while the electrical measurements indicate the suitability of the fabricated films for optoelectronic applications.
Article
Polymer Science
Andong Wang, Mingwei Shao, Fan Yang, Chenkang Shao, Caifeng Chen
Summary: In this study, PVDF/TPs and PVDF/TPs/Ag composite thin films were prepared using electrically assisted 3D printing method, and their surface morphology, hydrophilicity, and antibacterial properties were studied. Results showed that TPs promoted crystallinity and hole formation on PVDF surface, while the deposition of silver nanoparticles improved antibacterial activity significantly.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Ming Jiang, Zhan Cheng, Dan Zhao, Lei Zhang, Dong Xu
Summary: In this study, Mg-doped CCTO thin films were prepared by a modified sol-gel method, and a comparative study on their microstructure and electrical properties was carried out. The results showed that Mg doping could reduce the grain size of CCTO films and improve the dielectric constant and frequency stability.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Biochemistry & Molecular Biology
Xiao Wang, Zhihua Shen, Jie Li, Shengli Wu
Summary: This study prepared a c-axis crystallized IGZO thin film by RF sputtering and found that it exhibited better acid corrosion resistance compared to amorphous IGZO films, with a 74% increase in anticorrosion performance. This suggests that crystalline IGZO thin films can provide more stable performance in applications.
Article
Materials Science, Ceramics
Helei Dong, Hao Zhang, Feng He, Zhen Jia, Kailong Wei, Qiulin Tan
Summary: In order to gain an economic advantage, nanocrystalline Ba0.5Sr0.5TiO3 (BST) thin films were prepared using an aqueous sol-gel process. Characterization through X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirmed the perovskite structure of the films and the oxidation state of the Ba element. The BST thin film prepared at a lower annealing temperature of 600 degrees C showed optimal crystallinity, superior dielectric properties, and excellent optical transparency.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Laixia Nian, Yuanhang Qu, Xiyu Gu, Tiancheng Luo, Ying Xie, Min Wei, Yao Cai, Yan Liu, Chengliang Sun
Summary: The piezoelectric constants of AlN, ScAlN, and AlN/ScAlN composites were obtained through first-principles calculation and Mori-Tanaka model. Five types of AlN/ScAlN thin films were prepared on 8-inch silicon substrates, and the film quality was characterized by measuring crystal quality, roughness, and stress distribution. The results showed that the composite film effectively addressed the problem of abnormal grains and reduced roughness. A lamb wave resonator with an AlN/Sc0.2Al0.8N composite was fabricated, which had an effective electromechanical coupling coefficient K-eff(2) of 6.19% and potential for designing high-frequency broadband filters.
Article
Materials Science, Characterization & Testing
Nihat Demirbilek, Fahrettin Yakuphanoglu, Mehmet Kaya
Summary: In this study, nano-structured semiconductor thin films and p-type Si photodiodes were fabricated using the sol-gel spin coating technique with pure ZnO and co-doped ZnO:Al-x:Cu-y. The structural, optical, and electrical properties of the thin films and photodiodes were investigated, revealing promising rectifying and photosensitive behaviors that suggest potential applications in optoelectronic circuits and electronic devices.
Article
Chemistry, Multidisciplinary
Mathias Wolf, Shuichi Toyouchi, Peter Walke, Kazuki Umemoto, Akito Masuhara, Hiroshi Fukumura, Yuta Takano, Michio Yamada, Kenji Hirai, Eduard Fron, Hiroshi Uji-i
Summary: Organic materials have advantages in NLO applications, with Li@C-60 showing strong NLO potential. However, its low purity has been a hindrance in the fields of solar cells, electronics, and optics.
Article
Materials Science, Multidisciplinary
Roger Magnusson, Biplab Paul, Per Eklund, Grzegorz Greczynski, Jens Birch, Bo Jonson, Sharafat Ali
Summary: Thin films in the AlSiO system were prepared by reactive RF magnetron co-sputtering with varying substrate temperature and Si/Al contents. The films exhibited different growth rates, microstructures, and optical properties depending on the deposition conditions. AlSiO-coated glasses showed improved transmission in the visible region, with thickness and roughness being influenced by the Si content.
Article
Materials Science, Multidisciplinary
E. Aschauer, T. Wojcik, P. Polcik, O. Hunold, M. Arndt, V Dalbauer, P. H. Mayrhofer, P. Felfer, H. Riedl
Summary: This study investigates the diffusion of oxygen at 800 to 1100 degrees C through nano-laminated crystalline Ti-Al-N and amorphous Mo-Si-B based multilayer coatings, revealing the importance of morphological features such as grain and column boundaries during high-temperature oxidation of protective thin films. The results show that preventing oxygen diffusion along column boundaries and implementing amorphous interlayers can lead to stable oxidation behavior even at 1100 degrees C.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Yong-bin Wu, Yan Li, Ying-jie Zhao, Wei Zhou, Fu-xin Zhong
Summary: F-doped Cu2O films were deposited on Cu sheet substrates using hydrothermal method, and the influence of doping concentration on the film properties was studied. Doping improved the crystallinity and photoelectric properties of the films, resulting in increased photovoltage and photocurrent density.
Article
Optics
Gabriel J. Gallant, Jean-Francois Bisson
Summary: This article investigates the optical properties of anisotropic thin films. By computing the polarization eigenstates and eigenvalues of the Jones matrices, additional insights are obtained. The results demonstrate that the eigenvectors are mutually orthogonal in most regions of the wavevector space, except at specific exceptional points.
Article
Engineering, Multidisciplinary
Ugur Caligulu, Nida Darcan, Haluk Kejanli
Summary: This study investigated the impact of Calcium (Ca) and Manganese (Mn) dopants on the optical and surface properties of Titanium dioxide (TiO2) nanomaterial. The results showed that the doping ratio of Mn affected the morphological properties of TiO2 and increased the optical band gap of the samples. The produced samples have potential applications in transparent conductive electrode applications, optoelectronic devices, and sensor production.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2021)
Article
Materials Science, Paper & Wood
Sumedha M. Amaraweera, Chamila Gunathilake, Oneesha H. P. Gunawardene, Nimasha M. L. Fernando, Drashana B. Wanninayaka, Asanga Manamperi, Rohan S. Dassanayake, Suranga M. Rajapaksha, Mahinda Gangoda, C. A. N. Fernando, Asela K. Kulatunga, Aruna Manipura
Summary: The study investigated the effects of acid hydrolysis on cassava starch, showing improved structural and performance properties, reduced moisture absorbance, increased tensile strength, and potential applicability for food packaging due to enhanced mechanical properties and good thermal stability.
Article
Optics
G. Pradeesh, V. Ponnuswamy, B. Gowtham, R. Suresh, J. Chandrasekaran
Article
Materials Science, Characterization & Testing
P. Jayamurugan, R. Mariappan, S. Deivanayaki, V Ponnuswamy, P. Maadeswaran, Murthy Chavali, Y. V. Subba Rao
POLYMERS & POLYMER COMPOSITES
(2020)
Article
Engineering, Electrical & Electronic
R. Suresh, M. Justin Paul, K. Thiruma Valavan, S. Karthik Kannan, R. Marnadu, J. Chandrasekaran, H. H. Hegazy, M. Aslam Manthrammel
Summary: Nebulizer spray pyrolysis technique was used to deposit well-dispersed spindle-shaped yttrium-doped cerium oxide films, showing optical, PL, XRD characteristics and detailed film structure by SEM images. The rectification ratio changes of p-Si/n-YDC diode with voltage were related to heterojunction resistances. Transient photocurrent characteristics indicated the highly stable prepared heterostructure's potential for UV detector and white light applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Optics
R. Priya, R. Mariappan, P. Jayamurugan, R. Bakkiyaraj, Mohd. Shkir
Summary: This study investigates the properties of undoped LaPO4 nanoparticles synthesized at different optimizing temperatures, including structural, morphological, optical, and fluorescence properties. The increase in annealing temperature resulted in the transition of the sample from amorphous to more crystalline, with a decrease in band gap observed. The SEM and TEM studies revealed spherical morphology at 800 degrees C, while EDS analysis showed atomic percentages of La (22.42), P (17.69), and 0 (59.8) at that temperature.
Article
Physics, Condensed Matter
B. Amudhavalli, M. Prasath, R. Mariappan
Summary: The nebulizer-sprayed Cd1-xZnxO films were prepared at 400°C with varying Cd:Zn volume ratios, showing significant impact on the optoelectronic properties. The presence of Cd, Zn, and O in the deposited films was confirmed through EDS analysis. Additionally, photoluminescence and complex impedance studies revealed changes in film characteristics.
SOLID STATE COMMUNICATIONS
(2022)
Review
Physics, Condensed Matter
R. Priya, R. Mariappan, A. Karthikeyan, E. Palani, E. Krishnamoorthy, G. Gowrisankar
Summary: The study provides an overview of pure and doped LaPO4 nanoparticles, highlighting the preference for phosphor particles with larger crystallite size and spherical agglomerated morphology for emitting the highest PL intensity.
SOLID STATE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
B. Amudhavalli, R. Mariappan, M. Prasath
Summary: This review discusses the applications of thin film materials in various fields and explores the advantages and disadvantages of different chemical deposition methods. The influence of preparative parameters on the properties of thin films is also discussed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Anbalagan Karthikeyan, Ramasamy Mariappan, Ganesan Gowrisankar, Ethirajan Krishnamoorthy
Summary: Transition metal oxides, specifically cobalt oxide, have been identified as potential low-cost and eco-friendly materials for the removal of organic dyes from industrial wastes. In this study, Co3O4 nanocapsules were synthesized through a facile surfactant-free route, exhibiting excellent photocatalytic degradation activity on methylene blue (MB) under ultraviolet (UV) light irradiation. The narrow band gap of approximately 1.65 eV of Co 600 facilitated enhanced charge separation and transfer, leading to the generation of OH- and O-2(-) radicals. Furthermore, the Co 600 samples could be easily recovered from the dye solution using an external magnetic field.
EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
B. Amudhavalli, R. Mariappan, M. Prasath
Summary: Zinc oxide (ZnO) thin films were prepared on glass substrates at different temperatures using nebulizer spray pyrolysis technique. The films were characterized by X-Ray diffraction (XRD), High resolution scanning electron microscope (HRSEM), Energy dispersive analysis by X-rays (EDAX), Photoluminescence (PL), UV-Vis-NIR spectrometer, and impedance spectroscopy. The results showed that the films had polycrystalline hexagonal wurtzite structure and preferential orientation along the (002) plane. The films exhibited good transparency, with an average transmission of 85-95% in the visible region, and the optical band gap shifted with temperature.
JOURNAL OF OVONIC RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
R. Mariappan, R. Priya, R. N. Jayaprakash
Summary: Aluminum-doped lanthanum phosphate (LaPO4:Al) nanoparticles were synthesized via co-precipitation and showed a monoclinic structure with increasing crystallite size (D) and decreasing band gap values as the Al-doping concentration increased. The I-V electrical performance of 10% Al-doped LaPO4-based metal-insulator-semiconductor (MIS)-type Schottky barrier diodes (SBDs) was investigated and showed improved barrier height and ideality factor values compared to undoped Cu/LaPO4/n-Si and Cu/Al-LaPO4/n-Si SBDs. These results represent some of the best reported for 10% Al-doped LaPO4 Schottky barrier diodes.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
A. Karthikeyan, R. Mariappan, R. Bakkiyaraj, E. Krishnamoorthy
Summary: Researchers prepared nano-sized Co3O4 materials using a facile coprecipitate technique, which exhibited excellent electrochemical performance with high specific capacitance and cycling stability suitable for electrode materials in supercapacitors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
R. Mariappan, R. Priya, R. Bakkiyaraj, A. Karthikeyan
Summary: In this study, a Cu/Sn-LaPO4/n-Si MIS Schottky barrier diode with 10% Sn doping was successfully fabricated and its photodiode properties were investigated. The photodiode parameters, such as barrier height, ideality factor, and saturation currents, were determined from the I-V forward and reverse bias curves using the thermionic emission theory. The experimental results of the 10% Sn-LaPO4 SBDs showed a linear decrease in the ideality factor (n) to 2.31 and 1.74, respectively, with a small increase in the effective barrier height (phi(B)) of 0.744 and 0.806 eV in dark and light conditions, indicating their potential use in optoelectronic industries.
Article
Materials Science, Multidisciplinary
R. N. Jayaprakash, R. Mariappan
Summary: The study investigated the properties of SnO2 thin films deposited on glass substrates heated at different temperatures. The films exhibited polycrystalline structure with preferential orientation along the (100) direction, and an increase in surface morphology size as temperature rose. Optical properties showed high transmittance and optical band gap energy increased with temperature.
CHALCOGENIDE LETTERS
(2021)
Article
Chemistry, Inorganic & Nuclear
S. Vijayan, Chandra Sekhar Dash, G. Umadevi, M. Sundararajan, R. Mariappan
Summary: Zinc sulfide nanoparticles were prepared successfully using sol-gel precipitation method, with structural analysis confirming cubic formation. The nanoparticles showed antibacterial properties against Escherichia coli and Staphylococcus aureus, suggesting potential as an antimicrobial agent for preventing implant-linked infections.
JOURNAL OF CLUSTER SCIENCE
(2021)
Article
Physics, Multidisciplinary
K. Gnanamoorthi, M. Balakrishnan, E. Ranjith Kumar, R. Mariappan, T. Prakash, A. Ameer Baig, M. Prakasam
JOURNAL OF ADVANCED PHYSICS
(2018)