Article
Materials Science, Multidisciplinary
Rishuang Jing, Zhuoxin Yang, Li Sun, Zhongquan Nie, Zhichao Yu, Ensi Cao
Summary: Pr6O11-loaded ZnO sensor with a Pr/Zn ratio of 0.05 exhibited the highest gas response to acetone, with relatively high repeatability, stability, and selectivity. The improved sensing performance can be attributed to the larger electron depletion region and higher Schottky barrier height in the ZnO nanorods caused by electron transfer from ZnO to Pr6O11 across the interface.
Article
Optics
Muna H. Kareem, Haitham T. Hussein, Adi M. Abdul Hussein
Summary: This study investigates the fabrication of acetone gas sensors by depositing carbon nanotubes doped with zinc oxide nanoparticles on porous silicon surfaces. The results show that the doped carbon nanotubes exhibit high sensitivity to acetone gas at room temperature under specific conditions.
Article
Engineering, Electrical & Electronic
Bidyut Barman, Sanjay Kumar Swami, Viresh Dutta
Summary: Sputter deposition of multilayer ZAZ and AAA TCO coatings was achieved using a magnetron sputtering system, showing improved electrical properties compared to commercial ITO film. High-temperature annealing demonstrated stable optical and electrical properties of the fabricated TCO layers up to 200℃.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ke Zhang, Yunsheng Li, Wenrui Zhang
Summary: ZnO/alpha-Fe2O3 nanocomposites with ultra-sensitive response to acetone were successfully prepared by hydrothermal and solvothermal methods. The synthesized materials were characterized by SEM, TEM, XPS and other means, and the results indicated that a good heterojunction was constructed between alpha-Fe2O3 nanorods and ZnO nanosheet particles. Gas sensing tests showed that the ZnO/alpha-Fe2O3(S-2) sensor exhibited superior performance, with high response (Ra/Rg = 62.8), fast response and recovery time (4 s and 10 s) to 100 ppm acetone at 220 degrees C. The n-n heterojunction effect and structural characteristics were identified as the main reasons for the performance improvement. The nanocomposites have promising prospects in the field of acetone detection.
Article
Chemistry, Analytical
Jun Ho Lee, Seung-Eun Baek, Hyun-Sook Lee, Dahl-Young Khang, Wooyoung Lee
Summary: Through experiments and analysis, researchers have successfully developed highly sensitive acetone sensors. Among the four different sensors, the NC(0.5 h)/Line sensor exhibited the best response capability, with a low detection limit as well.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Jintao Zhang, Xiaohua Jia, Tiantian Liu, Yong Li, Dan Shao, Lei Feng, Haojie Song
Summary: In this study, a cactus-like graphene oxide (GO)/zinc oxide (ZnO) gas sensor was developed for the fast, selective, and reliable detection of acetone. The unique three-dimensional structure of the sensor, inspired by the cactus, provided more channels and active sites for acetone detection. The sensor exhibited improved response values, fast response/recovery times, and excellent selectivity for acetone.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Xiao-Yan Chen, Xin-Zhen Wang, Feng-Jun Liu, Guo-Song Zhang, Xiao-Jie Song, Jian Tian, Hong-Zhi Cui
Summary: Porous Zn2TiO4-ZnO microtubes were successfully fabricated using a carbon fiber template, exhibiting worm-like pore structures and improved gas sensing properties, with unique heterogeneous and porous structure contributing to the enhanced performance.
Article
Materials Science, Multidisciplinary
Yongkun Sui, Allison Hess-Dunning, Aziz N. Radwan, R. Mohan Sankaran, Christian A. Zorman
Summary: This study demonstrates that the surface morphology of silver structures prepared from particle-free inks can be controlled by solvent evaporation effects. The surface roughness and porosity of the silver films depend on the vapor pressure of the ink solvent, increasing with decreasing vapor pressure. Using inkjet printing, rough and porous metal films were fabricated for hydrogen peroxide sensors, with sensitivity increasing with surface roughness and porosity, which are related to the vapor pressure of the solvent.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Analytical
Sonalika Agarwal, Sanjay Kumar, Himanshu Agrawal, Mohamad G. Moinuddin, Manoj Kumar, Satinder K. Sharma, Kamlendra Awasthi
Summary: The design of hierarchical zinc oxide (ZnO) microstructures modified with silver (Ag) nanoparticles has been proven effective in enhancing hydrogen gas sensing performance. The Ag/ZnO hollow microstructures showed superior sensitivity, fast response and recovery time, as well as good stability, even at low hydrogen gas concentrations. This enhancement in sensing performance is attributed to the chemical and electronic sensitization effect of Ag nanoparticles, leading to a more sensitive sensor with improved selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Majdi Benamara, Pedro Rivero-Antunez, Hassen Dahman, Manel Essid, Souhir Bouzidi, Marc Debliquy, Driss Lahem, Victor Morales-Florez, Luis Esquivias, Jose P. B. Silva, Lassaad El Mir
Summary: This study reports on the preparation and characterization of pure and doped ZnO nanoparticles and their potential as gas sensors. The AZO nanoparticles were prepared using a sol-gel method and annealed at 400 degrees C. The structural and morphological properties were analyzed using XRD, TEM, and SEM. Results showed successful aluminum incorporation into the ZnO lattice, and the nanoparticles exhibited a spherical shape with nanometric dimensions. Gas sensors fabricated using the AZO nanoparticles demonstrated linear responses to gas concentration, with high sensitivity and selectivity to acetone.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Jinhao Zhang, Xin Wang, Zhiwei Yang, Jian Wang, Jiacheng Cao, Qian Chen, Shilong Yu, Jian Zhang, Tianwen Guo, Hai Li, Xiao Huang
Summary: In this study, egg-shell EGaIn/Ag/ZnO ternary composite particles were prepared as a wearable sensor capable of both pressure and proximity detection. The sensor showed excellent sensitivity to low pressures and could detect approaching objects up to 20 cm away. By combining the sensing curves in touchless and touching modes, the extracted parameters could be used to create fingerprints for different objects, demonstrating the potential of the sensor in the differentiation and identification of unknown objects for future robotics and artificial intelligence.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Zaka Ullah, Ayesha Rehman, Bushra Rehman, Muhammad Altaf, Nazmina Imrose Sonil, Shahid Atiq, Muhammad Saleem, Muhammad Azhar, Saira Riaz, Shahzad Naseem
Summary: This study demonstrates the facile and scalable spray coating of carbon nanotubes and carbon nanotubes/zinc oxide nanoparticles on cellulose fiber frameworks for the fabrication of flexible liquid sensors. The sensors exhibit notable response for drinking water, isopropyl alcohol, and milk, with a response time as low as 0.5 seconds for isopropyl alcohol and sensitivity as high as 97,400 for milk, attributed to the swelling behavior of cellulose matrix and surface functionalization of carbon nanotubes/zinc oxide nanoparticles.
MICROELECTRONIC ENGINEERING
(2021)
Article
Materials Science, Ceramics
Jun-Dar Hwang, Yan-Jhong Chiou, Wei-En Zeng
Summary: The NAN TCE exhibits higher transmittance but higher sheet resistance compared to the Al electrode in p-Si/n-ZnO HPDs, enhancing the photo response for UV and visible bands. The Ni diffusion in ZnO of NAN TCE suppresses defects and increases carrier mobility, leading to improved performance with significantly lower dark current and higher photo to dark current ratios.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Analytical
Q. A. Drmosh, Yousif Ahmed Al Wajih, Ibrahim Olanrewaju Alade, A. K. Mohamedkhair, Mohammad Qamar, Abbas Saeed Hakeem, Z. H. Yamani
Summary: A new approach to improve the performance of acetone gas sensors by engineering the depletion layer using Au decorated ZnO/Ag core-shell films has been developed. The findings demonstrate that controlled engineering of the depletion layer is an effective method for designing high-performance metal oxide-based gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Ruijia Xue, Guixin Wan, Tao Qin, Feifei Zhang, Yunxia Li
Summary: In2O3-ZnO nanoflower-like acetone gas sensors were synthesized using a simple and green method. The sensor with a reaction time of 5 hours showed the best performance, with high sensitivity, low detection limit, good selectivity, and stability. The improved gas-sensitive performance was attributed to the heterogeneous structure between the two materials and the three-dimensional flower-like structure.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Amna Akmal, Faiza Arshad, Riffat Shakeel, Tayyab Shabir, Saira Riaz, Shahzad Naseem
Summary: Spintronics is a new field that utilizes electron spin and charge to redefine modern information technology. Various spintronic devices, such as GMR-based devices and MRAMs, have been researched in recent years. Conventional ferromagnetic materials with spin asymmetry have been the basis of these devices. Half metallic ferromagnetic materials, particularly Heusler alloys, are considered the most promising candidates due to their high spin polarization. Previous investigations of Heusler alloys were mainly theoretical, with few experimental reports using high-cost vacuum-based methods. This study experimentally investigates the structural, electronic, and magnetic properties of the Co2MnSn Full Heusler alloy using density functional theory by ADF. The results predict the half metallic and asymmetric behavior of the Co2MnSn Full Heusler alloy with an L21 structure. The thin films of cobalt manganese tin are prepared by the electrodeposition method, and the magnetic properties are observed to vary with the applied voltage.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Industrial Relations & Labor
Ghulam Mustafa, Namra Mubarak, Jabran Khan, Muhammad Nauman, Asim Riaz
Summary: The study investigates the relationship between leader-member exchange and innovative work behavior of project employees, with employee engagement mediating this relationship and self-efficacy moderating it. The research was conducted in the IT sector of Pakistan, with data collected from 230 IT project employees. The findings highlight the importance of actions to enhance the innovative work behavior of project employees, showing that leader-member exchange is positively associated with this behavior, and employee engagement and self-efficacy play important roles in this relationship.
EMPLOYEE RESPONSIBILITIES AND RIGHTS JOURNAL
(2023)
Article
Optics
Sania Ayub, Adnan Khalil, Rahila Shaheen, Soumaya Gouadria, Muhammad Bilal Tahir, Zaka Ullah, Abdul Hannan, El Sayed Yousef, Meshal Alzaid
Summary: In this work, the structural, elastic, electronic, optical, and magnetic properties of Hg2WO4 are investigated using CASTEP simulation tool. The calculations reveal that Hg2WO4 has a stable C-centered monoclinic structure with space group C2/c. It is found to be a ductile material and has an indirect band gap of 2.14 eV. The optical study shows that it has good photosensitivity in the visible light region and the spin-polarized treatment confirms its antiferromagnetic nature.
Article
Chemistry, Multidisciplinary
Hera N. Khan, M. Imran, Ifra Sanaullah, Irfan Ullah Khan, Anjum N. Sabri, Shahzad Naseem, Saira Riaz
Summary: This study investigates the structures and magnetic properties of various iron oxide nanoparticles synthesized with different pH values using the sol-gel method. The results demonstrate the potential applications of these nanoparticles in fields such as bio-nanotechnology and spintronics.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Ghulam M. Mustafa, Muhammad Maqbool, Zaka Ullah, N. A. Noor, M. Muzamil, Yousef Mohammed Alanazi, Sohail Mumtaz
Summary: This study presents a theoretical analysis of the technologically important physical properties of double perovskites K2ScAuX6 (X=Cl, Br), including transport, optoelectronic, and structural properties. The tolerance factor and enthalpy of formation were computed to ensure the structural and thermodynamic stability of these compounds. Substituting Br for Cl increased the lattice parameter and reduced the bulk modulus. The computation of elastic constants-based modulus of elasticity revealed their ductile nature. The analysis of electronic band structure showed their indirect bandgap nature. The polarizability of the material was assessed by computing the dielectric constant, extinction coefficient, refractive index, electrical and thermal conductivity, and Seebeck coefficient, demonstrating their suitability for advanced technological applications in optoelectronics and thermoelectric industry.
Article
Materials Science, Ceramics
Tanzeela Batool, Zaheer H. Shah, Hina Ashraf, Daoud Ali, S. Shamaila, Tehmina Anjum, Shahzad Naseem, Saira Riaz
Summary: Crop yield loss due to pathogenic infections costs billions of dollars annually. The use of antibiotics in agriculture is limited, necessitating the development of alternative protocols to combat microbial pathogens. Nanoparticles with antimicrobial properties, such as iron oxide, show potential in protecting plant/crop production and suppressing plant pathogens. This study synthesized iron oxide nanoparticles using the sol-gel method and magnetic field annealing, and demonstrated their efficacy in inhibiting bacterial growth and enhancing photocatalytic activity. In vitro and in vivo experiments also revealed improved plant growth parameters after treatment with iron oxide nanoparticles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Rabia Zafar, Shahzad Naseem, Saira Riaz, N. A. Noor, Asif Mahmood, Khuram Shahzad
Summary: The mechanical, optical, and thermoelectric properties of double perovskites compounds K2NaTlX6 (X = Cl, Br, I) were investigated using the DFT approach. The study explored their structural stability, optical absorption, and thermoelectric suitability.
Article
Computer Science, Information Systems
Zaka Ullah, Illani M. Nawi, Muath Al-Hasan, Muhammad Junaid, Ismail Ben Mabrouk, Abdul Rehman
Summary: Plasmonic metasurfaces operating in LWIR region are widely used for bio-sensing and imaging applications. This study presents a novel approach of integrating metasurfaces with plasmonic resonators, which can achieve high absorption efficiency and tunable resonance behavior. The fabricated prototype shows broad incident angle stability and near-perfect absorption at the resonance wavelength of 8 μm. This integration opens up new possibilities for enhanced biosensing applications with metasurface devices.
Article
Computer Science, Information Systems
Zaka Ullah, Muath Al Hasan, Ismail Ben Mabrouk, Muhammad Junaid, Fawad Sheikh
Summary: With the advancement of technology, shielding for terahertz (THz) electronic and communication equipment is increasingly important. In this article, a theoretical simulation approach based on finite difference time domain (FDTD) is utilized to study the absorption and shielding characteristics of a two-dimensional (2D) MXene Ti3C2Tx metasurface absorber in the THz band. The proposed metasurface achieves 96% absorption under normal illumination of the incident source and acquires an average of 25 dB shielding at 1 THz bandwidth, with the peak shielding reaching 65 dB. The results show the potential of 2D MXene-based stacked metasurfaces for low-cost devices in THz shielding and sensing applications.
CMC-COMPUTERS MATERIALS & CONTINUA
(2023)
Article
Computer Science, Information Systems
Saeed Ahmed Magsi, Mohd Haris Bin Md Khir, Illani Bt Mohd Nawi, Muath Al Hasan, Zaka Ullah, Fasih Ullah Khan, Abdul Saboor, Muhammad Aadil Siddiqui
Summary: Long Range Wide Area Network (LoRaWAN) in the Internet of Things (IoT) domain has attracted significant research interest for its potential in localization of IoT devices. It is well-suited for IoT localization applications due to its low power consumption and long range. This article evaluates the trilateration technique using Expected Signal Power (ESP) for localization in a large outdoor campus environment, and examines the impact of frequency hopping, outlier removal, and increasing the number of gateways on localization accuracy.
CMC-COMPUTERS MATERIALS & CONTINUA
(2023)
Article
Materials Science, Multidisciplinary
Faisal Alresheedi, Rida Yasin, Sadia Nazir, N. A. Noor, A. Laref, Saira Riaz, Shahzad Naseem
Summary: This study thoroughly explains the electronic behavior, stability, optical and thermoelectric characteristics of CdKF3 and CdKCl3 halide perovskite. It demonstrates the importance of these materials for energy harvesting and thermoelectric device applications.
RESULTS IN PHYSICS
(2023)
Article
Physics, Condensed Matter
Qammar Abbas, Imran Sadiq, Hasan M. Khan, Farhan Sadiq, Muhammad Jamshaid Shabbir, Muhammad Shahbaz, Samreen Saeed, Ghulam M. Mustafa, Saira Riaz, Shahzad Naseem
Summary: This study investigates the impact of V2+ substitution on the structural, optical, electrical, and dielectric behavior of Ca2-xVxFe8O14 (x = 0.0, 0.4, and 0.6) hexaferrite. The results show that V2+ replacement affects the crystal structure and properties of the samples, making them potentially useful for high-frequency operating devices and magnetic storage systems.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Inorganic & Nuclear
Maryam Anwar, Zohra Nazir Kayani, Amna Hassan, Talat Zeeshan, Saira Riaz, Shahzad Naseem
Summary: This study explored the impact of Sm on the photocatalytic and antibacterial properties of ZnO. The results showed that Sm-doped ZnO nanostructures exhibited enhanced crystallite size and demonstrated effective photocatalytic and antibacterial activities. Potential applications of Sm-doped ZnO include sensor development, photovoltaic panels, wastewater treatment, and water-splitting.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zohra Nazir Kayani, Ifra Sheri, Salma Waseem, Saira Riaz, Shahzad Naseem
Summary: Ba-doped TiO2 thin films were fabricated using the sol-gel dip-coated method. X-ray diffraction confirmed the formation of the anatase phase. With the increase of Ba doping, the size of the crystallite decreased. The bandgap of pure TiO2 and Ba-doped TiO2 thin films was in the range of 3.15-2.94 eV, which is beneficial for enhancing solar cell efficiency and water treatment. Ba-doped TiO2 thin films exhibited low dielectric constant suitable for high-frequency devices and showed ferromagnetism. The antibacterial activity of Ba-doped TiO2 was higher than that of pure TiO2, making it suitable for application in nanomedicine.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Computer Science, Information Systems
Muhammad Aadil Siddiqui, M. H. Md Khir, Zaka Ullah, Muath Al Hasan, Abdul Saboor, Saeed Ahmed Magsi
Summary: This study used Fourier Transform Infrared Spectroscopy (FTIR) to identify adulteration in meat products. The results showed that principal component analysis (PCA) and partial least square (PLS) can be used to differentiate lard adulteration in meat samples based on different wavenumbers.
CMC-COMPUTERS MATERIALS & CONTINUA
(2023)
