Article
Materials Science, Multidisciplinary
Ravi Teja Mittireddi, Nisha Hiralal Makani, Deepak G. Prajapati, Abhay Raj Singh Gautam, Rupak Banerjee, Emila Panda
Summary: This study focuses on quantifying the impact of microstructure on the functionality of titanium dioxide films caused by minor changes in the fabrication process. Thin titanium dioxide films are deposited using sputtering with variations in target composition and working environment. Various characterization techniques are employed to quantitatively analyze the phase, chemical constitution, composition, thickness, roughness, density, etc. of the films and their link to electronic structure, electrical, optical, and surface characteristics. The insights from this study can guide the experimental design for fabricating films with desired functionalities by considering the tolerance range.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
N. Milicevic, M. Novakovic, J. Potocnik, M. Milovic, L. Rakocevic, N. Abazovic, D. Pjevic
Summary: Enhanced optical properties and photocatalytic activity of TiO2 thin films can be achieved by doping or coating with metals. In this study, TiO2-Au thin films were prepared using DC magnetron sputtering and annealing techniques, resulting in improved wettability and photo-degradation rates compared to pristine titania films.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Coatings & Films
Bruno Martins, Carlos Patacas, Albano Cavaleiro, Pedro Faia, Oleksandr Bondarchuk, Filipe Fernandes
Summary: Ti1-xAlxN thin films with different Ti/Al ratios were prepared by direct current magnetron sputtering, and the electrical response to temperature was investigated. The film showed a negative temperature coefficient thermistor behavior from x = 0.21 onwards, with a maximum sensitivity observed for x = 0.56 and 0.69. The conduction mechanism for x = 0.46 was based on electron hopping, and the effect of grain boundary was more relevant than the grain at low temperatures.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ying-Tsung Li, Dian-Ting Chen, Chang-Fu Han, Jen-Fin Lin
Summary: The doping of zirconium (Zr) into Indium Tin Oxide (ITO) thin films through varying direct current (DC) power sources has a significant impact on the surface morphology, microstructure, and mechanical, electrical, and optical properties. Increasing the DC power can lead to more pronounced grain orientation, higher crystallinity, lower hardness, and modulus. Choosing the optimal power level can result in improved transmittance and reduced resistivity.
Article
Metallurgy & Metallurgical Engineering
Yu Zhang, Jie Chen, Ben-shuang Sun, Shuai Liu, Zhi-jun Wang, Shu-han Liu, Yong-chun Shu, Ji-lin He
Summary: In this study, IGZO films were deposited using RF magnetron sputtering technology with a high-purity In2Ga2ZnO7 ceramic target. The films exhibited a uniform and smooth surface at room temperature with good thermal stability. However, as the temperature increased, the surface roughness increased, resulting in decreased performance.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Physics, Condensed Matter
Aarju Mathew Koshy, A. Sudha, Satyesh Kumar Yadav, Parasuraman Swaminathan
Summary: Copper oxide thin films were deposited on quartz substrates by DC magnetron sputtering, and the effect of deposition temperature on the optical properties was investigated. The results showed that the deposition temperature influenced the conductivity, crystallinity, and defect density of the films, indicating their potential for various technological applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Xiu-Lan Xu, Qian-Ming Huang, Guo-Nan Feng, Gang Han, Qi-Xun Guo, Xiao-Dong Xiong, Xin He, Jun-Feng Luo, Rong-Ming Wang, Chun Feng, Guang-Hua Yu
Summary: Through the use of an external magnetic field during sputtering, cobalt thin films can have their grain arrangement improved, showing more regular orientation. Films deposited with a high pass-through flux target exhibit randomly oriented grains, while those from a low pass-through flux target show relatively consistent orientations which in turn influence their remanence ratios.
Article
Engineering, Electrical & Electronic
Maria Isabel Pintor-Monroy, Martin Gregorio Reyes-Banda, Carlos Avila-Avendano, Manuel A. Quevedo-Lopez
Summary: In this study, a simple and cost-effective method for fabricating thin film transistors (TFTs) based on undoped amorphous Ga2O3 thin films deposited at room temperature by magnetron sputtering is discussed. The control of Ga2O3 thin film resistivity over a wide range is demonstrated by controlling the deposition power and pressure. These TFTs exhibit promising characteristics and have been evaluated as phototransistors under DUV radiation, showing high rejection ratio, responsivity, gain, detectivity, and photosensitivity.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
D. A. Granada-Ramirez, A. Pulzara-Mora, C. A. Pulzara-Mora, A. Pardo-Sierra, A. Cardona-Bedoya, M. Perez-Gonzalez, S. A. Tomas, S. Gallardo-Hernandez, J. G. Mendoza-Alvarez
Summary: InGaN thin films were deposited on silicon substrates using RF magnetron sputtering, and the In content was controlled by adjusting the substrate temperature. The optical and structural properties of the films were analyzed, and it was found that the band gap energy increased with temperature.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Qingguo Feng
Summary: The electronic and optical properties of MgGeN2 Pnma phase thin films, which have a strong dependence on film thickness, were investigated. For odd number multilayers, the band gap reduced from 2.574 eV for trilayers to 2.350 eV for pentalayers, and further to 2.202 eV for heptalayers. For even number multilayers, the band gap decreased from 2.866 eV for bilayers to 2.692 eV for quadlayers, and further to 2.670 eV for hexalayers. The variation in properties is attributed to the number of surface and sub-surface layers, as well as their bonding relations. Additionally, different multilayers exhibit either direct or indirect band gaps. Thus, controlling the film thickness can be utilized for device design to expand the potential applications of II-IV-N2 ternary nitrides.
Article
Chemistry, Physical
Bryan Horcholle, Christophe Labbe, Xavier Portier, Philippe Marie, Cedric Frilay, Weiqiang Yuan, Wojciech Jadwisienczak, David Ingram, Clara Grygiel, Julien Cardin
Summary: Undoped and doped Nb2O5 thin films were successfully deposited on silicon wafer using sputtering technique and annealed to investigate their chemical, structural, optical, and photoluminescent properties. The study revealed the stoichiometry, phase transformations, refractive index, and electronic properties evolution of the films with annealing temperature and Tb3+ ion content. Raman spectra analysis confirmed the structural evolution, while the correlation between photoluminescence and electronic properties was highlighted.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Samira Dorri, Justinas Palisaitis, Grzegorz Greczynski, Ivan Petrov, Jens Birch, Lars Hultman, Babak Bakhit
Summary: We studied the oxidation properties of sputter-deposited TiB2.5 coatings at different temperatures. The results showed that at 600 degrees Celsius, the coating exhibited protective oxidation behavior, and the structure of the oxide layer also changed. Moreover, decreasing the heating rate had a noticeable impact on the oxidation process.
Article
Chemistry, Physical
Jose de Jesus Araiza, Leo Alvarez-Fraga, Raul Gago, Olga Sanchez
Summary: Hafnium oxide films were deposited on sapphire and silicon (100) substrates using the DC reactive magnetron sputtering technique from a pure hafnium target at different discharge power levels. The influence of the cathode power on the composition, structure, morphology, and optical properties of the films was investigated. The results showed that the films had increased crystalline content and oxygen-rich composition with higher sputtering power, and exhibited mound morphologies on the surface.
Article
Chemistry, Physical
Qiang Li, Cheng Chen, Manzhang Xu, Yingnan Wang, Xuewen Wang, Zhiyong Zhang, Wu Zhao, Johan Stiens
Summary: The study demonstrated that the crystal structure of SiCN thin films significantly influences their blue-violet emission intensity, and annealing process can optimize the photoluminescence performance of the films. Characterization results using XRD and PL spectra showed that, under annealing at 900 degrees Celsius, SiCN samples exhibited the best crystallinity and blue-violet emission intensity.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Di Zhou, Lei Huang, Juntang Yuan, Chao Li
Summary: The study found that the sputtering current has an influence on the deposition rate and roughness of SiNx thin films, with higher sputtering current favoring a more uniform and dense film structure. Additionally, annealing at 500 degrees Celsius causes the rupture of Si-N bonds in the films, affecting the insulation performance.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)