Article
Physics, Condensed Matter
Seval Aksoy Pehlivanoglu
Summary: The study investigates the physical properties and optical behavior of Zn-doped NiO films, finding that the addition of Zn improves film smoothness and optoelectronic performance. Photodiodes exhibit good photosensitivity and linear response, with barrier heights determined using various methods for validation.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Aniruddh Bahadur Yadav, Gopal Rawat, Basavaraj S. Sannakashappanavar
Summary: This paper presents the preparation of Sn doped ZnO thin films using a low-cost chemical sol-gel spin coating process and the deposition of Ohmic and Schottky electrodes to form a Metal-Semiconductor-Metal (MSM) structure. The UV detection capability of the device was analyzed through electrical characterization, and various parameters including saturation current, ideality factor, and barrier height were calculated. The results showed an increase in forward and reversed bias current when exposed to UV light, and the responsivity and series resistance of the device were also reported.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ali Riza Deniz
Summary: In this study, lead oxide (PbO2) was used as an interface material in Schottky diode applications, and its morphological properties were analyzed. Reference diode and PbO2/n-Si heterojunctions were fabricated and the parameters were calculated. The experiment showed that the diode parameters were strongly temperature-dependent, and the diode capacitance decreased with increasing frequency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Phuong T. M. Nguyen, Tai Nguyen, Minh D. Nguyen, Thu-Hien Vu
Summary: The choice of electrode materials significantly influences the morphology, crystallographic orientation, lattice mismatch-induced microstrains, and electrical properties of BSZT thin films. BSZT thin films deposited on conductive oxide electrodes exhibit highly (100)-textured structures with minimal microstrains, while those on Pt electrodes show polycrystalline structures. The best dielectric tunability and low dielectric loss were observed for BSZT thin films on LaNiO3 electrodes.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
E. Erdogan, M. Yilmaz, S. Aydogan, U. Incekara, Y. Sahin
Summary: In this study, a metal-semiconductor contact with an organic interlayer was fabricated, and the electrical parameters of the device were extracted using different methods. The results show that the interface cannot conduct AC signals at sufficiently high frequencies.
Article
Multidisciplinary Sciences
Andac Batur Colak, Tamer Guzel, Anum Shafiq, Kamsing Nonlaopon
Summary: This paper presents a new model that represents the symmetric connection between capacitance-voltage and Schottky diode. An artificial neural network structure is used to predict the capacitance voltage characteristics of the Schottky diode with organic polymer edge, and the effect of neuron numbers on prediction accuracy is evaluated.
Article
Engineering, Electrical & Electronic
Ali Riza Deniz
Summary: This study investigated the effect of V2O5 material on electrical properties of Schottky diodes, and found that V2O5 material can improve the electrical performance of the diode. The diode parameters vary significantly with temperature, which is attributed to the inhomogeneous distribution in the potential barrier.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jitong Zhou, Yunping Wang, Xianda Zhou, Guijun Li, Zhihe Xia, Fion Sze Yan Yeung, Man Wong, Hoi Sing Kwok, Shengdong Zhang, Lei Lu
Summary: The study showed that the performance of amorphous indium-gallium-zinc-oxide Schottky barrier diodes significantly improved with the addition of a passivation layer, exhibiting close to ideal ideality factor, high Schottky barrier, and large current rectification ratio.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Cristina Sanna, Patrick Taylor, Robert Hillard, Samuel Frey, Dan McDonald, Jonny Hoglund, Gyula Zsakai, Attila Marton, Peter Horvath
Summary: The passage discusses the use of Mercury probe Schottky capacitance-voltage for carrier density and resistivity profiling in silicon epitaxial layers, highlighting the importance of silicon surface preparation for high-quality CV measurements. Various methods for treating silicon surfaces are currently being used, with the treatment process being a limiting factor for measurement time and quality. Evaluations have been made on typical treatments for P-type Epitaxial silicon surfaces, as well as a novel concept involving a pretreatment chamber called PTC.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Condensed Matter
Gourab Bhattacharya, N. Vijay Prakash Chaudhary, Tapasendra Adhikary, Shampa Aich, A. Venimadhav
Summary: This study investigated electron transport across Galfenol and Nickel-based Schottky contacts on n-Si substrates through DC current-voltage measurements and AC Impedance spectroscopy. Improper back contact can cause additional bias dependent Resistance-capacitance components, which were studied using proper equivalent circuit models. The results showed distinct behavior in capacitance and barrier height, with negative capacitance observed in certain conditions. The use of an equivalent circuit with inductor-resistor relaxation provided a better fit for the experimental results.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Materials Science, Ceramics
M. Dinmohammadi, F. E. Ghodsi
Summary: In this study, α-Fe2O3-CuO nanocomposite thin films were successfully prepared with the addition of polymers. The addition of PEG and CTAB improved the electrochemical properties and magnetic behavior of the films.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Kung-Chu Chen, Kuan-Wun Lin, Jenn-Gwo Hwu
Summary: In this study, the current and capacitance characteristics of Al/SiO2/Si(p) MISTD with oxide thickness ranging from 2-4 nm were investigated. It was observed that the saturation reverse bias current increases with oxide thickness due to varying levels of SBHM. This non-intuitive phenomenon allows majority carriers to inject from metal to semiconductor, leading to stronger SBHM at thicker oxide thickness.
Article
Chemistry, Analytical
Minwoo Cho, Tae-yil Eom, Srijita Nundy, Joon-Shik Park, Hoo-Jeong Lee
Summary: Based on hafnium-added indium zinc oxide (Hf-IZO), a nitrogen dioxide (NO2) gas sensor was produced and showed high response and selectivity to NO2 gas, as well as long-term stability. The sensing performance of the 15 at% Hf-IZO sensor is linked to the concentration of oxygen vacancies generated by the hafnium doping.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Ceramics
Mohammadmoein Afrouzmehr, Navid Yasrebi, Mohammad Hossein Sheikhi
Summary: In this study, indium tin oxide sensors were fabricated using an electrophoretic deposition method, which showed better performance in detecting ethanol vapors compared to conventional methods. These new sensors have lower working temperatures, higher response rates, and better selectivity for ethanol vapor detection.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Santanu Majumdar, Baishakhi Pal, Rajib Sahu, Krishna Sundar Das, Partha Pratim Ray, Biswajit Dey
Summary: The use of croconic acid disodium salt as an organic gelator with Cd(ii) salt to obtain an efficient soft-scaffold supramolecular self-healable metallogel was investigated. Two-dimensional nanosheets of hexagonal boron nitride were incorporated within the gel network to obtain a 2D nanosheet dispersed metallogel. Microstructural and spectroscopic analysis were performed to understand the morphology and formation pathway of the metallogel. The metallogel showed fascinating electronic-charge transportation and the presence of hexagonal boron nitride nanosheets modulated its non-linear rectifying feature.
DALTON TRANSACTIONS
(2022)
Review
Energy & Fuels
Kwadwo Mensah-Darkwa, Daniel Nframah Ampong, Emmanuel Agyekum, Felipe M. de Souza, Ram K. Gupta
Summary: Energy storage has become increasingly important in recent decades, leading to a focus on developing innovative materials for sustainable storage systems. Transition metal chalcogenides have attracted attention for their intriguing electrochemical properties. This review explores the synthesis and modification of chalcogenides for energy storage devices, discussing their limitations and impact on battery and supercapacitor applications.
Article
Chemistry, Physical
Anuj Kumar, Ghulam Yasin, Saira Ajmal, Sajjad Ali, Muhammad Asim Mushtaq, Mohamed M. Makhlouf, Tuan Anh Nguyen, Patrizia Bocchetta, Ram K. Gupta, Shumaila Ibraheem
Summary: A MnN4-macrocyclic complex combined with black carbon was studied as an electrocatalyst for ORR in alkaline media. The composite exhibited comparable catalytic performance to traditional Pt/C catalyst and remarkable methanol tolerance. Theoretical studies explained the efficient catalytic mechanism based on charge distribution and molecular orbital structure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Jacob Som, Jonghyun Choi, Honglin Zhang, Nikhil Reddy Mucha, Svitlana Fialkova, Kwadwo Mensah-Darkwa, Jin Suntivich, Ram K. Gupta, Dhananjay Kumar
Summary: This study investigates the influence of substrate-induced strain on the electrocatalytic properties of NiO films for the hydrogen evolution reaction. It was found that NiO thin films exhibit strong sensitivity to strain, with the film showing the smallest strain recording the lowest overpotential for the HER. The use of simple thin-film synthesis to evaluate strain effects in electrocatalysis is demonstrated.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Vivek Sharma, Dipak Kumar Das, Vinod Kumar Vashistha, Ram K. Gupta, Ghulam Yasin, Anuj Kumar
Summary: Covalent organic frameworks (COFs)-based materials are considered as one of the most promising electrocatalysts for low-cost ORR. They offer precise control of active sites, simple understanding of structure-activity relationships, chemically adjustable properties, and defined reaction pathways.
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Anuj Kumar, Vinod Kumar Vashistha, Dipak Kumar Das, Ram K. Gupta, Ghulam Yasin
Summary: In this study, two macrocyclic complexes A (Mn-II) and B (Fe-II) were synthesized and characterized, and their interactions with DNA were investigated. The results showed that complex A exhibited stronger binding ability to DNA and had potential antibacterial activity.
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
(2022)
Article
Energy & Fuels
Jonghyun Choi, Tenzin Ingsel, Dipesh Neupane, Sanjay R. Mishra, Anuj Kumar, Ram K. Gupta
Summary: Metal-organic framework (MOF) derived cobalt oxide and sulfide show potential for high performance energy storage in water electrolyzers and fuel cells, with MOF-Co9S8 exhibiting superior electrocatalytic activity.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Biotechnology & Applied Microbiology
Taghazal Zahra, Khuram Shahzad Ahmad, Camila Zequine, Ram Gupta, Mohammad Azad Malik, Javed H. Niazi, Anjum Qureshi
Summary: In this study, bimetallic NiO/ZrO2 catalysts were synthesized using plant extract as a capping agent, and their electrocatalytic performance was investigated. The experimental results demonstrate that the synthesized catalyst exhibits remarkable oxygen evolution reaction performance comparable to precious metal catalysts.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Review
Chemistry, Inorganic & Nuclear
Sanket D. Bhoyate, Junyoung Kim, Felipe M. de Souza, Jerry Lin, Eunho Lee, Anuj Kumar, Ram K. Gupta
Summary: Metal-air batteries and fuel cells heavily rely on electrocatalytic O2 activation and O2 reduction reaction (ORR) with noble metal-free materials. However, the origins of their synergistic reactivity are still unclear. Understanding the correlation between science, engineering, and activity descriptors can lead to the development of novel, affordable, and efficient catalysts.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Engineering, Chemical
Magdalene A. Asare, Felipe M. de Souza, Ram K. Gupta
Summary: Waste cooking oil is a potential threat to health and the environment, but scientists are exploring ways to convert it into useful secondary raw materials. The research successfully transformed waste cooking oil into polyol and produced rigid polyurethane foams with competitive properties. The addition of flame retardants improved the flame retardancy performance of the product.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Review
Chemistry, Physical
A. A. P. R. Perera, K. A. U. Madhushani, Buwanila T. Punchihewa, Anuj Kumar, Ram K. Gupta
Summary: MXene is a versatile material with a wide range of applications, including energy storage, sensors, biomedical devices, and membranes. This review summarizes the latest findings on MXene materials, including their evolution, synthesis routes, applications, and surface functionalization. The review also highlights the use of MXene composites to enhance performance and overcome specific drawbacks. The information provided in this review is valuable for translating lab-scale findings into commercially viable products.
Article
Polymer Science
Vishwa Suthar, Magdalene A. Asare, Felipe M. de Souza, Ram K. Gupta
Summary: A polyol was synthesized from sunflower oil through epoxidation and ring-opening reactions, and bio-based polyurethane films were successfully fabricated. The addition of a small amount of graphene oxide improved the mechanical and thermal properties of the films.
Article
Polymer Science
Magdalene A. Asare, Prashant Kote, Sahilkumar Chaudhary, Felipe M. de Souza, Ram K. Gupta
Summary: This study explores the use of sunflower oil as a replacement for polyurethane production and investigates the effects of non-halogenated flame retardants. The results suggest that the addition of expandable graphite (EG) and dimethyl methyl phosphonate (DMMP) can significantly reduce the flammability of the foam while maintaining good physical and mechanical properties.
Article
Chemistry, Multidisciplinary
Rishabh Srivastava, Shiva Bhardwaj, Anuj Kumar, Rahul Singhal, Jules Scanley, Christine C. C. Broadbridge, Ram K. K. Gupta
Summary: This study demonstrates a green strategy for the preparation of cobalt oxide nanoparticles using orange peel extract, and enhancing their electrochemical properties through sulfurization and phosphorization. The phosphide-based nanoparticles exhibit over 85% capacitance retention after 5000 cycles.
Review
Energy & Fuels
Kwadwo Mensah-Darkwa, Daniel Nframah Ampong, Perseverance Dzikunu, Felipe M. de Souza, Anuj Kumar, Ram K. Gupta
Summary: Multi-metallic metal-organic frameworks (MOFs) derived materials have outstanding CO2RR catalytic performance and high atomic utilization efficiency, but their structure tuning and identification of active sites remain challenging. This review provides an overview of the advancements in science and engineering of multi-metallic MOFs and derived materials, and discusses key methods and possibilities for optimizing their catalytic performance.
Article
Engineering, Electrical & Electronic
Nene Lethukuthula, Malik Dilshad Khan, Siphamandla C. Masikane, Felipe M. de Souza, Jonghyun Choi, Ram K. Gupta, Neerish Revaprasadu
Summary: In this study, a green and facile microwave-assisted approach was demonstrated for the synthesis of phase pure sulfur-deficient indium sulfide (In2.77S4) nanoparticles. Castor oil and olive oil were used as green dispersants, solvents, and capping agents. The effect of different sulfur sources on the synthesized nanoparticles was investigated using sodium sulfide, thioacetamide, and thiourea. The obtained In2.77S4 nanoparticles prepared in castor oil with thiourea as the sulfur source showed satisfactory properties for energy storage and water splitting.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Bruno Galizia, Patrick Fiorenza, Corrado Bongiorno, Bela Pecz, Zsolt Fogarassy, Emanuela Schiliro, Filippo Giannazzo, Fabrizio Roccaforte, Raffaella Lo Nigro
Summary: This study demonstrates the growth of oriented AlN thin films on 4H-SiC substrates using PE-ALD technique, and investigates the impact of NH3 plasma pulsing on the microstructure and orientation degree of the AlN layers. The structural characterization reveals different polymorphic structures depending on the NH3 plasma pulsing time, and electrical nanoscopic characterization shows a correlation between the AlN crystalline phases and the insulating properties.
MICROELECTRONIC ENGINEERING
(2024)
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)
