Article
Nanoscience & Nanotechnology
Zhe (A. ) Jian, Kai Sun, Stefan Kosanovic, Christopher J. Clymore, Umesh Mishra, Elaheh Ahmadi
Summary: Wafer bonding of β-Ga2O3 and N-polar GaN single crystal substrates, achieved by adding ZnO as a glue interlayer, resulted in fully bonded wafers without Newton rings. Temperature-dependent current-voltage measurements revealed the impact of post-annealing temperature on the electrical and structural characteristics of the bonded samples. Annealing the bonded wafers at 1100°C in N-2,N- environment consistently produced ohmic-like characteristics, attributed to the crystallization of ZnO and diffusion of Ga into ZnO. This work demonstrates promising wafer bonding of β-Ga2O3 and GaN, with potential applications in high-frequency and high-power devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xu Dai, Xi Zhang, Dan Gong, Gang Xiang
Summary: In this study, ferromagnetic amorphous gallium oxide (a-GMO) films with tunable Mn dopants were prepared. The Pt/a-GMO/Pt memristors showed a high Roff/Ron ratio of 103, thanks to the low resistance state induced by oxygen vacancies (VOs) and the high resistance state enhanced by Mn2+. Magnetic modulation (MM) was achieved electrically through tuning of bound magnetopolarons (BMPs) by bias voltage-induced VOs variations, which may have applications in quaternary information coding. The transition between Mn3+ and Mn2+ ions in the GOMRs was observed, providing an in situ tool to study the V-O induced resistive switching and BMP-dependent MM.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Valentine W. Muramba, Abdulraoof I. A. Ali, Jacqueline M. Nel
Summary: In order to meet the demand for cheaper solar cells, researchers have developed simpler, low-temperature, vacuum-free thin-film deposition processes. This study utilized a novel precursor to synthesize polycrystalline β-Ga2O3 films through spray pyrolysis and spin coating methods. The films exhibited small grain sizes and a wide band gap range, with characteristics suitable for photoelectric devices and solar cells passivation.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Nasir Alfaraj, Kuang-Hui Li, Meshal Alawein, Chun Hong Kang, Laurentiu Braic, Nicolae Catalin Zoita, Adrian Emil Kiss, Tien Khee Ng, Boon S. Ooi
Summary: This article investigates the ultrahigh sensitivity and DUV photodetection capability of a hybrid oxide-nitride stack grown heterogeneously on a conductive ceramic crystal. It was found that the growth process of beta-Ga2O3 crystal on TiN introduced additional defects, resulting in DUV photodetectors with true solar-blind characteristics.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Multidisciplinary
Donald M. Evans, Didrik Rene Smabraten, Theodor S. Holstad, Per Erik Vullum, Aleksander B. Mosberg, Zewu Yan, Edith Bourret, Antonius T. J. van Helvoort, Sverre M. Selbach, Dennis Meier
Summary: This study demonstrates the creation of dislocations with nanoscale spatial precision in a ferroelectric semiconductor using electric fields, allowing for local property control without the need for external macroscopic strain fields. The impact of dislocations on local electric transport behavior is studied through high-resolution imaging techniques and density functional theory calculations.
Article
Chemistry, Multidisciplinary
Owen Kendall, Lesly Melendez, Jiawen Ren, Samantha Prabath Ratnayake, Billy J. Murdoch, Edwin L. H. Mayes, Joel van Embden, Daniel E. Gomez, Arrigo Calzolari, Enrico Della Gaspera
Summary: In this study, spinel copper gallate (CuGa2O4) nanocrystals with an average size of 3.7 nm were synthesized and characterized via a heat-up colloidal reaction. The CuGa2O4 nanocrystals have a band gap of -2.5 eV and exhibit p-type character, which is consistent with ab initio simulations. When deposited as thin films, these novel nanocrystals are shown to be photoactive, generating a clear and reproducible photocurrent under blue light irradiation. The ability to adjust the Cu/Ga ratio within the nanocrystals and its effect on their optical and electronic properties was also demonstrated. These findings position CuGa2O4 nanocrystals as a promising material for optoelectronic applications, including hole transport and light harvesting.
Article
Nanoscience & Nanotechnology
Jack E. N. Swallow, Robert G. Palgrave, Philip A. E. Murgatroyd, Anna Regoutz, Michael Lorenz, Anna Hassa, Marius Grundmann, Holger von Wenckstern, Joel B. Varley, Tim D. Veal
Summary: The study investigates the electronic and optical properties of (InxGa1-x)(2)O-3 alloys with a lateral cation composition gradient and three crystallographic phases. It reveals the optical gaps and surface space-charge properties, as well as the electronic structure of different phases. The properties of the alloys, such as n-type dopability of In2O3 and the use of Ga2O3 as a solar-blind UV detector, are understood in comparison to other common-cation compound semiconductors based on simple chemical trends of band edge positions and volume deformation potential.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Soheil Mobtakeri, Yunus Akaltun, Ali Ozer, Merhan Kilic, Ebru Senadim Tuzemen, Emre Gur
Summary: The study investigated the effects of deposition pressure and growth power on the properties of Ga2O3 thin films deposited on sapphire and n-Si substrates. SEM images revealed a transition from 2D growth mode to 3D columnar growth mode with increasing deposition pressure. Annealing resulted in larger grain formation and similar transmittance values for thin films grown at different pressures. Additionally, a red shift in absorption edges and a decrease in band gap values were observed with increasing growth pressure.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
V Montedoro, A. Torres, S. Dadgostar, J. Jimenez, M. Bosi, A. Parisini, R. Fornari
Summary: Cathodoluminescence investigations were conducted on epsilon-Ga2O3 samples grown with different carrier gases, showing that an increase in Si concentration results in reduced emission intensity, with no evidence of band-to-band recombination. Temperature dependence of the CL signal suggests radiative transitions from the CB to deep acceptor states, likely of intrinsic nature.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Ceramics
Xiaokun Yang, Xuejian Du, Jie Liu, Rongrong Chen, Di Wang, Yong Le, Hongyan Zhu, Bo Feng, Jin Ma, Hongdi Xiao
Summary: Nanoporous GaN wafers fabricated by electrochemical etching were used as substrates to deposit Er-doped Ga2O3 epitaxial films, which showed excellent crystal quality and optoelectronic properties. The films have great potential for fabricating Ga2O3 optoelectronic devices.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Yan Wang, Jialiang Jiang, Zhichao Song, Jun Zhang
Summary: Lithium gallium oxide (LiGaO2 & LiGa5O8) nanoparticles were successfully synthesized using thermal evaporation method under different atmospheric conditions, with differing synthesis preferences for each type in air or argon. The nanoparticle-based photodetector exhibited significant changes in electrical and luminescence properties, and showed sensitivity to temperature fluctuations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
A. Ferreiro, G. Flores-Carrasco, M. Quevedo-Lopez, A. Urbieta, P. Fernandez, M. E. Rabanal
Summary: Nanostructured ZnO: Nd nanoparticles codoped with lithium were prepared by the polyol method at low temperature and short synthesis time. The influence of different lithium contents on the properties of the materials was investigated. The results showed that the materials had a polycrystalline wurtzite structure without any secondary phases. The morphological and size studies indicated a change from hemispherical ZnO nanoparticles to spindle-shaped particles in the Li-Nd doped ZnO samples. XPS analysis confirmed the incorporation of Nd3+ in the materials. The Li-Nd codoped ZnO nanoparticles exhibited the highest photocatalytic activity in the presence of Rhodamine B.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Sanghyun Moon, Donggyu Lee, Jehwan Park, Jihyun Kim
Summary: This study demonstrates the fabrication of a high dielectric constant, 2D amorphous gallium oxide (GaOX) using the liquid-gallium squeezing technique. The GaOX is combined with a beta-phase gallium oxide (β-Ga2O3) conducting nanolayer to form a stable MISFET. The incorporation of the 2D GaOX gate dielectric layer in an active channel layer enables the facile fabrication of MISFET devices at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Celesta S. Chang, Nicholas Tanen, Vladimir Protasenko, Thaddeus J. Asel, Shin Mou, Huili Grace Xing, Debdeep Jena, David A. Muller
Summary: The study reveals that the thermodynamically unstable gamma-phase exists in both doped beta-Ga2O3 films and beta-(AlxGa1-x)(2)O-3 films, with its thickness correlated to the growth temperature. In doped films, a surface layer of the gamma-phase is observed, and heating results in the growth of a gamma-phase region accompanied by the movement of surface Ga interstitials.
Article
Physics, Multidisciplinary
N. Carlon Zambon, Z. Denis, R. De Oliveira, S. Ravets, C. Ciuti, I. Favero, J. Bloch
Summary: By embedding quantum wells into semiconductor microresonators, tightly confined and mutually interacting excitonic, optical, and mechanical modes can coexist. In this study, we investigate the parametric modulation of optical and excitonic resonances by the interaction with a mechanical mode in the strong exciton-photon coupling regime. We find that the exciton-phonon coupling in semiconductors leads to a significant enhancement of polariton-phonon interactions, making it possible to achieve near-unity single-polariton quantum cooperativity on current semiconductor resonator platforms. We also analyze how polariton nonlinearities affect dynamical backaction, altering the ability to cool or amplify the mechanical motion.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Afiq Anuar, Nur Adilah Roslan, Shahino Mah Abdullah, Tahani M. Bawazeer, Mohammad S. Alsoufi, Nourah Alsenany, Azzuliani Supangat
Article
Materials Science, Multidisciplinary
Syaza Nafisah Hisamuddin, Shahino Mah Abdullah, Siiti Anis Khairani Alwi, Siti Rohana Majid, Afiq Anuar, Khaulah Sulaiman, Sarayut Tunmee, Narong Chanlek, Tahani M. Bawazeer, Mohammad S. Alsoufi, Nourah Alsenany, Azzuliani Supangat
Article
Engineering, Mechanical
Ahmed Mohamed Mahmoud Ibrahim, Wei Li, Hang Xiao, Zhixiong Zeng, Yinghui Ren, Mohammad S. Alsoufi
TRIBOLOGY INTERNATIONAL
(2020)
Article
Physics, Condensed Matter
Amirah Basir, Hanan Alzahrani, Khaulah Sulaiman, Fahmi F. Muhammadsharif, Mohammad S. Alsoufi, Tahani M. Bawazeer, Siti Fairus Ab Sani
Summary: The UV absorption of TPD was enhanced by doping with Alq3 in a 1:2 volumetric ratio, leading to reduced energy gap. The electronic transition in TPD changed from direct forbidden to direct allowed with the addition of Alq3, resulting in larger photocurrent, increased exciton generation, and improved UV sensing. The signal to noise ratio improved with up to 1:2 volumetric ratio of Alq3, but decreased with higher amounts of Alq3 added.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Green & Sustainable Science & Technology
Faisal A. Osra, Huseyin Kurtulus Ozcan, Jaber S. Alzahrani, Mohammad S. Alsoufi
Summary: In many countries, open dumping is considered a common way of managing solid waste, but it leads to environmental pollution and resource waste. Therefore, by better utilizing solid waste and recovering energy from it, the situation of waste management can be effectively improved.
Article
Chemistry, Inorganic & Nuclear
Tahani M. Bawazeer, Mohammad S. Alsoufi, Mohd Shkir, Badria M. Al-Shehri, Mohamed S. Hamdy
Summary: A facile process was used to prepare high quality ZnO nanostructures with different levels of Fe doping, resulting in smaller particle sizes and enhanced photocatalytic activity. The synthesis of Fe-doped ZnO was confirmed with homogeneous Fe distribution and a systematic reduction in energy gap.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Engineering, Aerospace
Mohammed Yunus, Mohammad S. Alsoufi
Summary: Functional requirements such as higher strength, resistance, and protection from chemical reactions are achieved by modifying the exposed surfaces of base metals using TBC. The characteristics of TBC-coated GT components, including mechanical, thermal, and tribology evaluation, were compared between traditional and 3-D printing-based manufacturing processes. Improvements in substrates manufactured from SLM methods were significant, except for porosity and surface roughness, which are important for embedding sensors and thin films in TBCs for continuous monitoring.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Mohammed Yunus, Mohammad S. Alsoufi
Summary: The conventional machining process of nitinol alloy can lead to extensive tool wear and poor surface quality. Using WEDM and PSO, the machining parameters can be optimized to improve metal removal rate and surface roughness. By studying response models and optimization methods, the optimal parameter combination for reducing surface roughness and maximizing metal removal rate can be determined.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2021)
Article
Chemistry, Analytical
Siti Anis Khairani Alwi, Syaza Nafisah Hisamuddin, Shahino Mah Abdullah, Afiq Anuar, Atiqah Husna Abdul Rahim, Siti Rohana Majid, Tahani M. Bawazeer, Mohammad S. Alsoufi, Nourah Alsenany, Azzuliani Supangat
Summary: In this study, a solution-processed bulk heterojunction organic photodiode using VTTBNc as a p-type material was experimentally observed. The blend film of VTTBNc:PC71BM with a volumetric ratio of 1:1 showed optimized performance with excellent detectivity and responsivity. VTTBNc was found to extend light absorption to the near-infrared region, enhancing the overall performance of the photodiode.
Article
Materials Science, Multidisciplinary
Anshuman Das, Smita Padhan, Sudhansu Ranjan Das, Mohammad S. Alsoufi, Ahmed Mohamed Mahmoud Ibrahim, Ammar Elsheikh
Summary: Sustainable machining is a main branch of sustainable manufacturing, aiming to improve environmental conditions, reduce power consumption, and minimize machining costs. In this study, the performance of three sustainable machining techniques was compared during the turning of austenitic stainless steel, with minimum quantity lubrication outperforming the other techniques in terms of economic feasibility and technical viability.
Article
Chemistry, Physical
Smita Padhan, Sudhansu Ranjan Das, Anshuman Das, Mohammad S. Alsoufi, Ahmed Mohamed Mahmoud Ibrahim, Ammar Elsheikh
Summary: This study compares the performance of four cooling/lubrication techniques in machining nickel-based super alloys and finds that MQL technology can significantly reduce cutting force, improve surface quality, lower cutting temperature and white layer thickness, and provide longer tool life.
Article
Chemistry, Multidisciplinary
Navaneethakrishnan Gopal, Parameswaran Palaniyandi, Palanisamy Ramasamy, Hitesh Panchal, Ahmed Mohamed Mahmoud Ibrahim, Mohammad S. Alsoufi, Ammar H. Elsheikh
Summary: In this research, zinc was alloyed with other nutrient metals to make a guided bone regeneration material. The physical, chemical, and biological properties of the alloy were studied and discussed through various tests and analysis methods.
Article
Chemistry, Multidisciplinary
Suyog S. Patil, Anand K. Bewoor, Rajkumar B. Patil, Ravinder Kumar, Bulbul Ongar, Yerlan Sarsenbayev, Seepana PraveenKumar, Ahmed Mohamed Mahmoud Ibrahim, Mohammad S. Alsoufi, Ammar Elsheikh
Summary: Failure Modes, Effects, and Criticality Analysis is used to assess failure modes, causes, and effects of a system. To overcome the limitations of traditional methods, a new model integrating Multi-Criteria Decision-Making approaches and expert opinions is proposed. The model is effective and flexible in handling complex system data.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Amirul Ashraf Md Sabri, Fadlan Arif Natashah, Syaza Nafisah Hisamuddin, Nur Adilah Roslan, Tahani M. Bawazeer, Mohammad S. Alsoufi, Azzuliani Supangat
Summary: In this study, we investigated the utilization of DDCI-4 as a photoactive material for organic photodiodes. By adjusting the concentration of DDCI-4, the optical and electrical performance of the devices can be improved, especially in the near-infrared region.
Article
Engineering, Multidisciplinary
Mohammed Yunus, Mohammad S. Alsoufi
INTERNATIONAL JOURNAL OF ENGINEERING AND TECHNOLOGY INNOVATION
(2020)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
