Article
Optics
Menghan Jia, Fang Wang, Libin Tang, Jinzhong Xiang, Kar Seng Teng, Shu Ping Lau, Yanfei Lu
Summary: UV photodetectors based on metal oxide heterostructures have gained significant interest due to their excellent performance and ease of fabrication. In this study, a UV photodetector consisting of p-NiO/SiO2/n-ZnO heterostructure was prepared by RF magnetron sputtering method, exhibiting remarkable performances such as high rectification ratio, responsivity, and external quantum efficiency at low power consumption.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
O. Ozturk, B. M. Candan, S. Kurnaz, O. Cicek, A. T. Tasci
Summary: ZnO nanorod/ZnO thin film structures synthesized using a hydrothermal method exhibit unique solar sensing characteristics. Samples grown for 2 and 3 hours in a 10 mM solution performed the best.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Applied
Zhenwei Wang, Takahiro Kitada, Daiki Takatsuki, Jianbo Liang, Naoteru Shigekawa, Masataka Higashiwaki
Summary: In this study, p-Si/n-Ga2O3 and p(+)-Si/n-Ga2O3 heterostructures were fabricated using surface-activated bonding technique, and their electrical properties were investigated. Current density-voltage measurement before and after thermal annealing at 450 ? showed a significant increase in current density after annealing, which was attributed to thinning of the intermediate layer formed during the bonding process. Distinctive two-stage capacitance-voltage characteristics were observed for p-Si/n-Ga2O3 heterostructures, and numerical calculation considering the effect of two-dimensional electron gas formed at the heterointerface reproduced these characteristics well. These results indicate that Ga2O3-based p-n heterostructures with good interface properties and large-area uniformity can be fabricated using surface-activated bonding.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Dan Zhang, Chaochao Fu, Jing Xu, Chao Zhao, Jianfeng Gao, Yaodong Liu, Menghua Li, Junfeng Li, Wenwu Wang, Dapeng Chen, Tianchun Ye, Dongping Wu, Jun Luo
Summary: This paper discusses the method of using dopant segregation technique to adjust the Schottky barrier heights of NiSi/Si diodes, and presents a technique to distinguish different types of diodes.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Electrical & Electronic
Karla N. Mukai, Joseane C. Bernardes, Daliana Muller, Carlos R. Rambo
Summary: In this study, ZnO aerogels with different concentrations of Al or Na dopants were successfully synthesized using a sol-gel process. The Al-doped aerogels showed a significant decrease in bandgap and an increase in specific surface area. By depositing the doped ZnO aerogels on ITO-coated glass substrates using a drop casting method, p-n homojunctions with characteristic diode rectifying behavior were obtained.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jun-Dar Hwang, Meng-Chi Lin
Summary: Due to the small valence band discontinuity at NiO/Si interface, the p-NiO/n-Si heterojunction photodiodes have poor UV detection. However, by sandwiching a ZnO layer between p-NiO and n-Si, the UV response is largely enhanced due to the large valence band discontinuity at ZnO/Si interface. The ZnO layer also suppresses the dark current and increases the detectivity of the photodiodes.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Computer Science, Information Systems
Jasurbek Gulomov, Oussama Accouche, Rayimjon Aliev, Raymond Ghandour, Irodakhon Gulomova
Summary: This paper focuses on exploring new materials and structure to enhance the efficiency of solar cells, specifically by studying ZnO/Si and TiO2/Si heterojunction solar cells. The electrical and optical properties of ZnO and TiO2 were determined using different functionals in Density Functional Theory (DFT). It was found that TiO2 can be used as a transparent contact and ZnO as an emitter layer in a silicon-based solar cell.
Article
Chemistry, Physical
Lekgolo M. Maebana, Rapelang G. Motsoeneng, Zamaswazi P. Tshabalala, Hendrik C. Swart, Franscious R. Cummings, Mudalo Jozela, Steven S. Nkosi, David E. Motaung
Summary: CuO-ZnO heterostructures containing different concentrations of Zn were synthesized via hydrothermal synthesis and used for xylene vapor detection. The sensor showed excellent selectivity, stability, and sensitivity towards xylene vapor, with a low detection limit of 9.5 ppb and a sensitivity of 0.063 ppm-1. The superior gas sensing characteristics of the CuO-ZnO heterostructure can be attributed to its large surface area, the creation of a p-n heterojunction, and the strong chemical affinity and catalytic performance of p-type CuO towards xylene vapor. The response mechanism to xylene was also clarified.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Michael Cholines Pedapudi, Jay Chandra Dhar
Summary: A highly sensitive UV-C photodetector based on beta-Ga2O3 nanowires was fabricated, showing good photo absorption and emission properties. It operated efficiently in the UV-C region with high responsivity, detectivity, and low noise equivalent power. The device also demonstrated fast transient response times due to the strong p-n junction.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Lorenzo Bottiglieri, Abderrahime Sekkat, Mouncif Belmouhoub, Joao Resende, Viet Huong Nguyen, Matthieu Weber, David Munoz Rojas, Carmen Jimenez, Jean-Luc Deschanvres
Summary: In this work, the synthesis of high-performance transparent diodes based on p-type out-of-stoichiometry CuCrO2 and n-type ZnO thin films is presented. The devices were fabricated using scalable chemical deposition methods at low temperature and ambient pressure. The optimization of the devices was achieved by fine-tuning the deposition parameters of the p-type semiconductor and the deposition temperature of the n-type counterpart. The results showed that the ZnO layer had an antireflection function, resulting in an optical transmittance of over 75% in the visible range. The optimized junction between Cu2O + CuCrO2 and polycrystalline ZnO exhibited the highest rectification ratio reported in the literature for similar devices. These results have great significance for optoelectronics and the transparent oxide electronics industry.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Iulia Cojocariu, Matteo Jugovac, Sidra Sarwar, Jeff Rawson, Sergio Sanz, Paul Koegerler, Vitaliy Feyer, Claus Michael Schneider
Summary: This article explores the unique optoelectronic properties of organic p-n junctions in the field of molecular electronics by adjusting the fluorination level in metal-supported bilayered Pc-based structures, with potential application in photovoltaic devices.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Ceramics
Mohammad -Reza Zamani-Meymian, Nima Naderi, Maryam Zareshahi
Summary: The present research investigated the effect of graphene layer and zinc oxide nanorods on the photovoltaic performance of ZnO thin film-based heterojunction solar cells. The results showed that the addition of graphene improved the photovoltaic properties, increasing the efficiency and fill factor of the solar cells.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Mingyan Xue, Wenbo Peng, Xuefeng Tang, Yahui Cai, Fangpei Li, Yongning He
Summary: The performance of a photodetector consisting of micropyramid structured p-Si/n-ZnO NWs heterojunction is optimized using the pyro-phototronic effect, leading to a significant increase in photoresponsivity. Furthermore, the introduction of chopper frequency and a thin film Al layer as the back electrode further improve the photocurrent and photoresponsivity. The coupling between the pyrophototronic effect and the piezo-phototronic effect is analyzed, showing a decrease in photoresponsivity and photocurrent under compressive strain.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Vipin Kumar, Ishpal Rawal, Vinod Kumar
Summary: This study reports the fabrication of n-ZnO/p-Si++ hetero-junction devices for detecting hydrogen leakage, showing that annealing temperature affects film properties, with crystallite size and density increasing with temperature.
Article
Engineering, Electrical & Electronic
Sudem Daimary, Priyanka Chetri, Jay Chandra Dhar
Summary: This article introduces a UV-A photodetector based on axial n-ZnO/p-CuO heterostructure nanowires array fabricated using GLAD technique. The photodetector exhibits high rectification ratio, low dark current, and fast photoresponse, and shows high detectivity and low noise equivalent power.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Materials Science, Ceramics
Farhank Saber Braim, Nik Noor Ashikin Nik Ab Razak, Azlan Abdul Aziz, Mohammed Ali Dheyab, Layla Qasim Ismael
Summary: This study examined the use of Sumac plant extract as a green stabilizer for superparamagnetic magnetite nanoparticles (SPMNPs). The extract solution was used as a green stabilizer to fabricate aqueous colloidal suspension of SPMNPs. The properties of the synthesized nanoparticles were characterized and compared to uncoated SPMNPs. The results showed that the Sumac extract significantly improved the stability and magnetic properties of the coated SPMNPs, making them suitable for various biomedical applications.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Ahmad M. Al-Diabat, Natheer A. Algadri, Naser Mahmoud Ahmed, Adnan Bin Hamed Alrajhi, Munirah Abdullah Almessiere, Amal Mohamed Ahmed Ali, Anas A. M. Alqanoo, Abdulwahab S. Z. Lahewil, Salma Abdulrahman Al-Wasli
Summary: The performance of a hydrogen gas sensor based on carbon nanotubes can be greatly improved through acid treatment or functionalization.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Malek G. Daher, Youssef Trabelsi, Y. K. Prajapati, Abinash Panda, Naser M. Ahmed, Ahmed Nabih Zaki Rashed
Summary: In this manuscript, a surface plasmon resonance (SPR)-based biosensor is proposed for the detection of infected red blood cells (IRBCs) with Plasmodium Falciparum. The suggested SPR sensor has a high sensitivity and can exhibit significant resonance angle shifts with minute variation in refractive index. Various 2D materials are used to enhance the efficiency of the detector.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Saleh K. Alsaee, Elham Mzwd, Mohamad Aizat Abu Bakar, S. A. M. Samsuri, Naser M. Ahmed, Mundzir Abdullah, Ibrahim Abdul Razak, Suhana Arshad
Summary: A novel pyrene-based chalcone compound (BDP) was synthesized and its molecular and optical properties were investigated. It was found that the optical properties of the BDP compound are highly dependent on solvent polarity.
Review
Materials Science, Multidisciplinary
Naif H. Al-Hardan, Mohd Firdaus-Raih, Muhammad Azmi Abdul Hamid, Azman Jalar
Summary: The global spread of SARS-CoV-2 infections has created a new challenge for controlling the virus. Rapid and accurate detection of infections is crucial for isolating individuals and providing early treatments. This review presents the use of electrolyte-gated field effect transistor-based biosensors for virus detection, including SARS-CoV-2. The types of bioreceptors used for virus detection and their applications for COVID-19 are discussed in detail.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Physics, Applied
Muna E. Raypah, Naser M. Ahmed, Naif H. Al-Hardan, Munirah A. Almessiere
Summary: In this study, a novel seedless and surfactant-free CBD method at low temperature was used to fabricate flower-shaped ZnO nanostructures (FZONSs) on glass and p-type silicon substrates for the first time. The structural properties of FZONSs were examined and showed three-dimensional flower-shaped nanomorphology. The grown FZONSs may have potential in various applications including advanced catalysts, sensing devices, and solar cells.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Biochemistry & Molecular Biology
Mohammed Ali Dheyab, Azlan Abdul Aziz, Nazila Oladzadabbasabadi, Alyaa Alsaedi, Farhank Saber Braim, Mahmood S. Jameel, Asmeit Ramizy, Mohammad Alrosan, Ali Madi Almajwal
Summary: This study investigates the influence of synthetic methods on the aggregation stability and antibacterial activity of gold nanoparticles against Staphylococcus aureus. The sonochemical method produces monodispersed spherical gold nanoparticles with excellent stability and strong antibacterial activity, which is significant for the development of new antibacterial agents and water purification processes.
Article
Nanoscience & Nanotechnology
Han Yann Heng, Muhamad Fikri Zaini, Leong Wei Xian Rebecca, Muhammad Aizat Abu Bakar, Mohamad Shuaib Mohamed Saheed, Abdul Razak Ibrahim, Naser Mahmoud Ahmed, Mundzir Abdullah
Summary: There is an urgent need to remove toxic lead from popular halide perovskite used in photonics and optoelectronics. This study demonstrates the synthesis of lead-free halide perovskite using an eco-friendly solvent and characterizes its properties. It also investigates the optical and nonlinear optical properties. This green and facile synthesis approach provides an alternative for the new applications of Bi-based perovskite.
PHOTONICS AND NANOSTRUCTURES-FUNDAMENTALS AND APPLICATIONS
(2023)
Article
Acoustics
Farhank Saber Braim, Nik Noor Ashikin Nik Ab Razak, Azlan Abdul Aziz, Mohammed Ali Dheyab, Layla Qasim Ismael
Summary: This study utilized ultrasound to rapidly modify iron oxide nanoparticles (Fe3O4 NPs) by incorporating bismuth nanoparticles (Bi NPs) on their surface, resulting in Fe3O4@Bi composite NPs. The optimized preparation parameters were determined using response surface methodology, and the stability and biocompatibility of Fe3O4@Bi NPs were improved. The sonochemical approach efficiently produced an extremely stable, homogeneous, and biocompatible Fe3O4@Bi NPs with multifunctional potential.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
Amal Mohamed Ahmed Ali, Naser M. Ahmed, Norlaili A. Kabir, Ahmad M. AL-Diabat, Natheer A. Algadri, Ahmed Alsadig, Osamah A. Aldaghri, Khalid H. Ibnaouf
Summary: In this study, thick film and bulk disk forms of aluminum-doped zinc oxide (AZO) were investigated for low-dose X-ray radiation dosimetry using the extended gate field effect transistor (EGFET) configuration. The prepared samples were characterized, and it was found that the samples were crystalline and comprised nanosheets of varying sizes. The EGFET devices showed an increase in drain-source currents with radiation doses and the sensitivity of the devices depended highly on the device geometry.
Article
Chemistry, Physical
Adnan H. Alrajhi, Naser M. Ahmed, Mohd Mahadi Halim, Abeer S. Altowyan, Mohamad Nurul Azmi, Munirah A. Almessiere
Summary: This paper reports the optical properties of zinc oxide nanofilm fabricated using organic natural products from Salvia officinalis leaves (SOL) extract and discusses the effect of nanocrystal structure on nanofilm optical properties.
Article
Crystallography
Amal Mohamed Ahmed Ali, Naser M. M. Ahmed, Norlaili A. A. Kabir, Natheer A. A. Algadri, Ahmad M. M. AL-Diabat, I. A. Wadi, Ahmed Alsadig, Osamah A. A. Aldaghri, Khalid H. H. Ibnaouf
Summary: Radiation measurements are crucial in various fields, and the development of cost-effective, sensitive, and compact radiation detection devices has improved its application. This study focuses on the performance of a low-cost X-ray radiation detector based on extended gate field effect transistors (EGFET). Different thicknesses of Al-doped Zinc oxide (AZO) were examined for sensitivity following X-ray irradiation. The response was analyzed in terms of threshold voltage shift, and the dependence on material composition and thickness was evaluated. These findings suggest that thin films could be a cost-effective alternative for real-time, room-temperature radiation detectors.
Article
Optics
Ali Saleh Alkadem Idriss, Nik Noor Ashikin Nik Ab Razak, Naser M. Ahmed, Youssef Aboubaker Abdulla
Summary: A novel TiO2/Cu/TiO2 multilayer thin film dosimeter with faster deposition rate, high purity, and uniformity was fabricated. The film has an amorphous, porous structure with spherical nanoparticles and is transparent in the visible region. The optimum TL intensity was found with the TiO2 (445 nm) / 14.2 nm Cu / TiO2 (130 nm) sequence. The multilayer film is suitable for thermoluminescence dosimetric applications.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Malek G. Daher, Naser M. Ahmed, Osamah Alsalman, Abinash Panda, Ahmed Nabih Zaki Rashed, Juveriya Parmar, Sofyan A. Taya, Shobhit K. Patel
Summary: To create a sucrose detector that is quick, precise, and sensitive, this study employs a surface plasmon resonance biosensor (SPRB) for the determination of sucrose concentration. By inserting a Si layer, the sensitivity of the SPRB is improved, allowing for a substantial shift in the resonance angle due to a small change in the analyte's refractive index. With optimized thicknesses of the Ag, Si, and BP sheets, the suggested SPRB achieves an extraordinarily high sensitivity of 322.66°/RIU, making it ideal for various biosensing applications.
Article
Chemistry, Multidisciplinary
Awras H. Ajil, Naser M. Ahmed, F. K. Yam, Zakariyya Uba Zango, Ismael A. Wadi, Ayed M. Binzowaimil, Osamah Aldaghri, Khalid H. Ibnaouf, Humberto Cabrera
Summary: In this study, 1% Ce-doped ZnO nanoparticles were synthesized using laser-assisted chemical bath synthesis technique and showed high efficiency in degrading Methyl Orange dye, especially under solar radiation.
APPLIED SCIENCES-BASEL
(2023)