Article
Materials Science, Ceramics
Ao Gong, Shan Zhang, Yong Li, Ye Zhao, Lei Xing, Liwen Zhang, Xihong Hao
Summary: A new self-powered photodetector based on ferroelectric LuMnO3 thin film with a narrow bandgap of 1.46 eV demonstrates high-sensitivity ultraviolet-visible-near infrared photodetection properties. The responsivity (R) and detectivity (D*) in sunlight reach 0.4 A/W and 7.05 x 1011 Jones, respectively, surpassing other ferroelectric photodetectors. The outstanding photodetection performances are attributed to the large photocurrent output and the synergistic effect of ferroelectric photovoltaic effect and interface barrier effect.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Jun Liu, Zhonghui Han, Jianning Ding, Kang Guo, Xiaobin Yang, Peng Hu, Yang Jiao, Feng Teng
Summary: This study prepared Bi2O2Se nanosheets using a hydrothermal method and Bi2O2Se films using a drop-coating method, and constructed a photoconductive detector based on the Bi2O2Se film. The results showed that the Bi2O2Se film based on treated nanosheets was denser and more continuous, with a higher photocurrent. Drying in a vacuum further increased the photocurrent of the device. The device based on Bi2O2Se film, dried in a vacuum at 180 degrees C, exhibited high responsivity and detectivity under 780 nm light illumination.
Article
Materials Science, Ceramics
M. Chakraborty, E. S. Kadir, R. N. Gayen
Summary: By varying the graphene oxide (GO) content, the modification of UV photo-response characteristics in transparent titanium dioxide-graphene oxide (TiO2-GO) nanocomposite thin films was studied. The presence of GO improves the optical band gap of TiO2 without affecting its transparency. The fabricated metal-semiconductor (MS) Schottky junctions with TiO2-GO nanocomposite thin films show rectifying behavior and improved UV response characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Ranajit Dey, Sameer Pradhan, P. K. Bajpai
Summary: Polycrystalline GaFeO3 (GFO) samples with average particle size of 25 nm and some porosity were prepared through the sol-gel method and sintered at 700 degrees C. The ceramics exhibited orthorhombic polar Pc2(1)n symmetry and leaky ferroelectric hysteresis loop at T < 350 K. Temperature-dependent magnetic properties analysis showed that the material exhibited a super-paramagnetic state at and above 297 K, with a magnetic Curie temperature value T-c increasing from 220 to 315 K with decreasing particle size.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Esra Aslan, Maharram Zarbali
Summary: In this study, Sb2S3 films were prepared by dip coating method at different temperatures, and photodetectors were also prepared using these films. The results show that the coating temperature significantly affects the crystallization and photoelectric properties of the films.
Article
Materials Science, Ceramics
Xinxing Hao, Zhe Zhu, Zhonghua Yao, Hua Hao, Minghe Cao, Hanxing Liu
Summary: This study investigates the effect of polarization difference on the energy storage density of dielectric materials and finds that excess Ti can optimize the dielectric characteristics. The study also highlights the importance of polarization difference in achieving high energy storage density in electrostatic dielectric capacitors.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Zeng Liu, Ling Du, Shao-Hui Zhang, Lei Li, Zhao-Ying Xi, Jin-Cheng Tang, Jun-Peng Fang, Mao-Lin Zhang, Li-Li Yang, Shan Li, Pei-Gang Li, Yu-Feng Guo, Wei-Hua Tang
Summary: A metal-semiconductor-metal (MSM) photodetector was constructed using microprocessing techniques, incorporating a β-gallium oxide thin film. The photodetector exhibited high photoresponsivity, specific detectivity, external quantum efficiency, and a linear dynamic range under 254-nm UV light illumination. The high photoconductive gain observed may lead to persistent photocurrent and suggest potential use in high deep-ultraviolet photoresponse applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Materials Science, Multidisciplinary
Akshta Rajan, Vishal Gupta, Kashima Arora
Summary: ZnO films with varying thicknesses were deposited for UV photodetection. The photoconductivity parameters of the photodetector were studied for UV radiation with a 365 nm wavelength. The deposited ZnO films showed poly-crystallinity with rough surfaces and oxygen-related defects, which enhanced UV photosensitivity. The photoconducting mechanism was studied using statistical interpretation of defects observed from photoluminescence spectra deconvolution. The 221 nm thick ZnO film exhibited improved photoconducting parameters due to increased defect density.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Optics
Zhicheng Dai, Yushen Liu, Guofeng Yang, Feng Xie, Chun Zhu, Yan Cu, Naiyan Lu, Qigao Fan, Yu Ding, Yuhang Li, Yingzhou Yu, Xiumei Zhang
Summary: In this study, AlGaN solar-blind ultraviolet metal-semiconductor-metal photodetectors with an Al composition of 0.55 were fabricated. The devices showed high spectral responsivity and external quantum efficiency, with current exhibiting a strong dependence on high temperatures. The Poole-Frenkel emission model and changing space charge regions were used to explain carrier transport and photoconductive gain mechanisms for the AlGaN PD, respectively.
CHINESE OPTICS LETTERS
(2021)
Article
Materials Science, Ceramics
Shisheng Liu, Xiaohui Wei, Song Lin, Minjie Guo
Summary: This study focuses on preparing MgO nanoparticles with small sizes and high surface areas, optimizing the calcination conditions to achieve better degradation ability towards paraoxon pollutants. MgO nanoparticles obtained at 600 degrees Celsius had an average grain size of 8.7 +/- 3.2 nm and a surface area of 231.4 m^2/g, showing excellent performance in paraoxon degradation.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Applied
Pei-Te Lin, Wen-Chun Huang, Yu-Qian Lou, Cing-Yuan Yan, Yu-Syuan Lin, Chiao-Li Chang, Po-Chih Chang, Jyh-Rong Gong, Wen-Jeng Hsueh, Chun-Ying Huang
Summary: The electrical performance of thin-film transistors using amorphous oxide semiconductor is significantly improved by incorporating metal cations, but the effect of these elements on photodetectors is unknown. This study shows that Li-doped a-ZTO thin-films have decreased oxygen vacancies and achieve an ultra-high photo-to-dark current ratio in UV photodetector applications. Therefore, solution-processed a-ZTO is well-suited for use in UV photodetectors with In-free AOSs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Yaming Zhang, Bingbing Li, Yanmin Jia
Summary: A BiFeO3 film was prepared using a sol-gel method, and the effects of relative humidity on the film's capacitance, impedance, and current-voltage characteristics were explored. The capacitance of the film increased significantly from 25 to 1410 pF as the relative humidity increased from 30% to 90%. The impedance also varied greatly, indicating good hysteresis and response time. Analysis of the humidity sensitivity mechanism revealed the crucial role of water molecule adsorption at both low and high humidity, extending the potential applications of ferroelectric BiFeO3 films in humidity-sensitive devices.
Review
Materials Science, Ceramics
Sumio Sakka
Summary: The history of sol-gel preparation of ferroelectric materials is reviewed, highlighting key milestones and developments in the field. The paper also discusses the impact of sol-gel preparation on the quality and properties of ferroelectric materials.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Marwa M. Hussein, Samia A. Saafan, H. F. Abosheiasha, Anwer S. Abd El-Hameed, Di Zhou, M. M. Salem, Moustafa A. Darwish
Summary: This research comprehensively analyzes the characteristics of Ba0.7Sr0.3TiO3 nanoparticles synthesized using a sol-gel approach, including their structure, electrical properties, and electrodynamic behavior. The study confirms the formation of a tetragonal perovskite phase and nano-crystalline nature through X-ray diffraction analysis. The electrical properties of the nanoparticles have been investigated, revealing a soft electric hysteresis loop with a small coercive field value, making them suitable for photovoltaic applications. Additionally, a compact dielectric resonator antenna based on the nanoparticles has been designed and characterized, showing good impedance matching and high antenna gain and efficiency in the sub-6 GHz frequency band, making it suitable for 5G applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Haoran Ding, Yi Peng, Meiqin Chen, Yang Yufei, Nan Wang, Xuhong Hu, Jianyu Deng, Wenhong Sun
Summary: In this study, La-InZnO films with different La doping concentrations were grown on p-GaN/sapphire film templates using the sol-gel spin-coating method, and self-driven p-GaN/n-ZnO hetero-junction ultraviolet (UV) detectors were prepared. The effects of La doping on the microstructure, optical, and electrical properties of the films were investigated, and the optical sensing characteristics and photoelectric response performance of four p-n heterojunction UV detectors were compared. La doping was found to decrease the content of oxygen vacancies as well as the carrier concentration and mobility of the films. The 2 at% doped device exhibited the best performance with a peak responsivity of 46 mA/W at 366 nm, a high spectral selectivity of only 6.92 nm, and fast response times of 1.15 ms and 2.42 ms for rise and decay, respectively. This study presents a feasible method for improving the performance of self-driven heterojunction UV detectors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Surbhi Gupta, Ayushi Paliwal, Vinay Gupta, Monika Tomar
APPLIED SURFACE SCIENCE
(2020)
Article
Materials Science, Ceramics
Pratyay Amrit, Surbhi Jain, Monika Tomar, Vinay Gupta, Bhawana Joshi
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Reema Gupta, Vinay Gupta, Monika Tomar
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Optics
Surbhi Gupta, Ayushi Paliwal, Vinay Gupta, Monika Tomar
OPTICS AND LASER TECHNOLOGY
(2020)
Article
Chemistry, Physical
Surbhi Gupta, Ayushi Paliwal, Vinay Gupta, Monika Tomar
Article
Chemistry, Physical
Surbhi Jain, Ayushi Paliwal, Vinay Gupta, Monika Tomar
Article
Materials Science, Multidisciplinary
Shaan Ameer, Kajal Jindal, Monika Tomar, Pradip K. Jha, Vinay Gupta
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Engineering, Electrical & Electronic
Jagdees Prasad, Ashwani K. Singh, Monika Tomar, Vinay Gupta, Kedar Singh
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Chemistry, Multidisciplinary
Meenakshi Dutt, Amar Ratan, Monika Tomar, Vinay Gupta, Vaishali Singh
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2020)
Article
Materials Science, Multidisciplinary
Sheetal Dewan, Monika Tomar, R. P. Tandon, Vinay Gupta
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2020)
Article
Physics, Condensed Matter
Surbhi Gupta, Vinay Gupta, Monika Tomar
SUPERLATTICES AND MICROSTRUCTURES
(2020)
Article
Energy & Fuels
Shiva Lamichhane, Savita Sharma, Monika Tomar, Ashok Kumar, Vinay Gupta
JOURNAL OF ENERGY STORAGE
(2020)
Article
Engineering, Electrical & Electronic
Rakesh Saini, Anil Kumar, Geeta Bhatt, Avinashi Kapoor, Ayushi Paliwal, Monika Tomar, Vinay Gupta
IEEE SENSORS JOURNAL
(2020)
Article
Multidisciplinary Sciences
Krishna Kamal Halder, Monika Tomar, V. K. Sachdev, Vinay Gupta
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2020)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
