bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gallium Arsenide and Gallium Nitride Semiconductors for Power and Optoelectronics Devices Applications
Authors: Sharma Ram Chhavi , Nandal Raina , Tanwar Nisha , Yadav Reema , Bhardwaj Jayant , Verma Aakash 
Published: February 2023

Abstract
The advancement in technology in semiconductor materials significantly contributed in improvement of human life by bringing breakthrough in fabrication of optoelectronics and power devices which have wide applications in medicine and communication. The Gallium Arsenide (GaAs) and Gallium Nitride (GaN) are versatile materials for such applications but with relative merits and demerits. GaAs transistors are suitable for both narrowband and wideband applications due to very wide operating frequency range (30 MHz to millimetre-wave frequencies as high as 250 GHz). They are highly sensitive, generate very little internal noise and have power density typically around 1.5 W/mm. But low break down voltage (5x105V/cm), low output power (5-10W) and inability to withstand higher temperatures are the main limitations. On the other hand, GaN possess the improved physical and chemical characteristics, with high output power, high operating temperature (1000°C in vacuum), fast heat dissipation, high breakdown voltage (4x106V/cm), high power density (5-12W/mm), high frequency characteristics and large band gap (3.4eV) which allow significant reduction of devise size. Also high breakdown voltage increases the overall impedance which make it suitable in matching process and enables efficient operation in broad band region. The present paper critically analyses the GaAs and GaN semiconductors in relation to their significant physical and chemical properties, which make them suitable to make efficient power and optoelectronics devices for applications in communication, space and medicine.
Bipolar Resistive Switching Behaviour of Polycrystalline BiFeO3 Thin Films Synthesized via Sol-gel Assisted Spin Coating Technique
Authors: Reddy B R , Halge D I , Narwade V N , Dadge J W , Bogle K A 
Published: February 2023

Abstract
Polycrystalline BiFeO3 thin films have been grown on glass substrates using a simple but efficient method commonly known as the spin coating technique. When used in a Cu / BiFeO3 / Cu configuration, the annealed BiFeO3 film (at 350 °C) exhibits bipolar resistive switching behaviour. The device shows stable resistive switching behaviour, where a stable hysteresis in the current–voltage curve was well developed by applying +/- 10 V at room temperature. The ratio of resistance in the high resistance state to the low resistance state of the device is ~ 104 with a good retention time of more than 106 min. The Poole–Frenkel emission at the Cu / BiFeO3 interface is proposed, and a redistribution of oxygen vacancies along the grain boundaries is found to play a key role in the resistance switching in the polycrystalline pure BiFeO3 films.
Nickel Ferrite Nano fluid Functionalized Tapered Microfiber Based Magnetometer
Authors: Khamari Subodh , Kumar Ashish , Mohapatra Niharika , Jha Rajan 
Published: February 2023

Abstract
Considering the promising utility of devices operating for high magnetic fields in noninvasive medical diagnostic applications such as magnetic resonance imaging, a microfiber-based magnetometer operating for an extensive dynamic range actuated via NiFe2O4 ferrite fluid is presented and proposed for the first time in this paper. NiFe2O4 nanoparticles with a mean diameter of 37 nm (derived from Debye–Scherer’s formula) are prepared usingthe sol-gel process to fabricate the magnetometer. Various scientific approaches are utilized to explore these nanoparticles’ structural, optical, morphological, and magnetic features. Optimized lower concentration (~2%) of the nanofluid is used in the surrounding environment of the fiber interferometer to measure an extensive range of magnetic field up to ~ 600 mT. The sensor can detect a diverse range of magnetic fields with a maximum sensitivity of 18 pm/mT. The operating range of a reported sensor can be extended further by applying a voltage source with finer tunability.
Uni-directional (001) pressure effect on optical gain spectra of InAs/GaAsSb quantum well heterostructure
Authors: Haider Syed Firoz , Kattayat Sandhya , Josey Smitha , Sublania H. K. , Alvi P. A. 
Published: February 2023

Abstract
In this article an attempt has been made to determine the uni-directinal (001-direction) pressure effect on the optical gain spectra and corresponding emission wavelength of a designed type-II nano-scale heterostructure based on GaAsSb-InAs material system. As a trial, the range of pressure applied was kept as 1-3 GPa. On introducing the uni-directional (001-direction) pressure (in the range of 1 GPa to 3 GPa) on the GaAsSb-InAs QW heterostructure, the optical gain is reduced significantly from 3050 /cm to 1150 /cm, while the transition wavelength shows the red shift.
Effect of cation distribution on structural and mechanical properties of Y3+ substituted Co-Zn spinel ferrites nanoparticles.
Authors: Nikam C U , Birajdar A P , Kadam S S , Choudhari S. S. , Shinde V S , Shelke S B , Kadam R H , Kale G H 
Published: February 2023

Abstract
Yttrium (Y3+) substituted Co-Zn spinel ferrite nanoparticles with compositional formula Co0.9Zn0.2YxFe1.9-xO4 (x = 0.0, 0.015, 0.030, 0.045, 0.06) were synthesized by using sol-gel auto-ignition route. The structural and mechanical properties of Co-Zn ferrites were tailored by the replacement of Fe3+ ions by Y3+ ions. Rietveld refined X-ray diffraction patterns of all the samples confirm the cubic spinel structure. Lattice parameter increases with the substitution of Y3+ ions which may be due to the difference in ionic radii. The crystallite size obtained from XRD analysis is found in the nanometer range of 16.8 – 24.7 nm. Distribution of cations over tetrahedral – A and octahedral – B sites have been studied by using X-ray diffraction data and it is found that Y3+ ions prefers the octahedral – B site. Infrared spectra of all the samples were recorded in the wave number range of 300 cm−1 to 800 cm−1 which shows splitting of the two fundamental absorption bands. Two absorption bands (ν1 and ν2) observed in the range 380 – 610 cm−1 are belongs to tetrahedral – A and octahedral – B interstitial sites. The force constants (KO and Kt) and corresponding elastic parameters were determined by using IR data. The stiffness constant (C11), Young’s modulus (E), rigidity modulus (G), bulk modulus (B) and Debye temperature (θD) were found increases with the addition of Y3+ ions.
Optical, Compositional and Electrical Properties of Transparent MgO Thin Film for ReRAM Devices
Authors: Das Om Prakash , Pandey Shivendra Kumar 
Published: February 2023

Abstract
The bipolar switching phenomenon is observed in the MgO-based memory cell having a metal-oxide-metal (W/MgO/Cu) structure. The MgO thin film offers a high transmittance of 86 - 88% for visible light, measured by UV-Visible spectroscopy. An optical bandgap of 4.2 eV is estimated from Tauc’s plot calculation from the absorption spectra of MgO thin film. In addition, the XPS scan on the O 1s and Mg 2p peaks reveals the types of chemical elements in the rf sputtered MgO thin film. The Mg 2p peak at 49.36 eV suggests the oxidization of Mg, and two peaks at 529.5 eV and 531.6 eV in the O 1s core level indicate the presence of lattice and non-lattice oxygen, respectively. Non-lattice oxygen is responsible for the resistive switching in oxide thin films, confirmed by electrical characterization. The I-V characteristic from the electrical measurement shows the SET and RESET transitions at 5 V and –5 V, respectively. Moreover, the experimental results provide information about Ohmic conduction in low and high resistive states. This work proposes MgO as a promising material for applications in next-generation non-volatile data storage applications.
Study of structural and spectroscopic characterization of co-doped ZnS Nanoparticles capped with L-Arginine
Authors: Sunatkari Swarnalata 
Published: February 2023

Abstract
The aim of the present study was to prepare ZnS nanoparticles co-doped with Li+-Cs+, were synthesized using a chemical co-precipitation method. The ZnS-(Li+-Cs+) nanoparticle’s were capped with L- Arginine and reduced using sodium sulphide. The main advantage of this method is to synthesized semiconductor nanomaterial with wide band gap and nanoparticles are chemically stable over a long time. The as prepared nanoparticles were characterised by X-Ray Diffraction technique for phase analysis of the sample. Particle size is found in the range of 2 to 4 nm calculated by Debye Scherer method. XRD confirms the evolution of stable cubic zinc blend phase of ZnS nanoparticles. The strong interaction between the capping agent L- arginine, Zn and S is revealed from the Fourier Transform Infrared (FTIR) spectrum.
Thermal properties of nano-silica added concrete
Authors: Babalu Rajput , Pimplikar S. S. 
Published: February 2023

Abstract
As energy costs are rising, the utilization of thermal insulating materials during construction has assumed paramount significance. The response of different building components to changes in external temperature depends on the material’s thermal properties. The investigation connected to concrete material thermal properties is an essential factor when concrete is used for constructing green buildings. The effect of adding nano-silica on the concrete’s thermal properties is explored, and the findings are shown in this paper. The experimental results reveal that compressive strength increases and density reduce for nano-silica added concrete. The investigation indicates that thermal conductivity and thermal diffusivity decrease for concrete, whereas specific heat increases with a rise in nano-silica content. Also, a mathematical model was developed for the calculation of thermal conductivity.
Optical band-gap evolution and local structural change in Ge2Sb2Te5 phase change material
Authors: Pathak Anushmita , Pandey Shivendra Kumar , Behera Jitendra Kumar 
Published: February 2023

Abstract
The amorphous to crystalline phase transition in Ge2Sb2Te5 (GST) phase change material is investigated using XRD and the systematic variation in the optical band-gap (Eg
) and structural disorder (B
1/2) employing UV-Vis-NIR spectroscopy. The amorphous phase is observed to have Eg
value of 0.708 eV while crystalline phase (200 °C) shows 0.442 eV. Variation in B
1/2 slope of 13.4 % is noted around the crystallization temperature (150 °C), depicting structural disorder reduction and hence structural ordering in the material forming the cubic phase. The change in the optical band-gap and local structural disorder upon crystallization occurs due to alternation in the atomic bonding configurations, which is explored using XPS technique. The findings reveal Ge-Te (~1218.35 eV binding energy) and Sb-Te (~528.8 eV) bonds in the amorphous phases. However, their bond lengths increase (hence binding energy reduces) as the annealing temperature rises, demonstrating phase switching occurs upon reaching the crystallization temperature. Insight into the optical band-gap, local structural disorder, and atomic arrangement governs many vital features of phase change material, such as fast crystallization speed, better thermal stability, high endurance, and large resistance contrast, which provide the path for non-volatile memory and nanophotonic applications.
Tailoring Of Poly(N-Methyl Pyrrole) Thin Film Surface With Au-Nanoparticles For Selective Sensing Of H2S
Authors: Ghosh Prasanta Kumar , Datta Kunal , Rushi Arti , Tilekar Sayali , Karle Pallavi , Shirsat Mahendra 
Published: February 2023

Abstract
We have demonstrated a highly selective H2S sensor fabricated out of Au-nanoparticles decorated Poly (N-Methyl Pyrrole) thin film. Electrochemical process parameters were initially optimized for uniform deposition of Poly (N-Methyl Pyrrole) on planar platinum substrate. Single step chronopotentiometric deposition resulted in a uniform and adhesive polymeric matrix which served as the basic sensing platform. To inculcate selectivity to the synthesized sensor backbone, the polymeric surface was tailored with Au nanoparticles via cyclic voltammetry. Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Analysis (EDAX) and FTIR spectroscopy were carried out to investigate morphological and structural aspects of the sensory material. The semiconductive regime of operation of the sensor was revealed by V-I characterization. Comparative investigations clearly indicated inclusion of Au nanoparticles resulted in better sensing behaviour than pristine polymeric matrix. Most interesting results were obtained on validating the sensor under independent atmospheres of NH3, NO2, SO2, and H2S where the sensor reflected fingerprinting of H2S. Successful detection of H2S with commendable response and recovery behaviour was possible down to concentration of 5 ppm. The overall sensing behaviour of the nanoparticles tailored polymeric matrix could open up opportunities for complex sensing platforms like e-noses.
Enhancement in Photoluminescence of Nematic Liquid Crystals Doped with CsPbBr3 Quantum Dots
Authors: Sutar A , Balwadkar S , Doke S , Shinde A , Kulkarni S , Kahane S 
Published: February 2023

Abstract
We report the enhancement in photoluminescence (PL) of nematic liquid crystals (NLCs) doped with CsPbBr3 (perovskite) quantum dots (QDs). QDs play a vital role to enhance the PL intensity, which has been attributed to the increase in the planar alignment of NLC molecules by reducing light leakage centres and intrinsic defects. QDs were synthesized by the hot injection chemical method. The structural properties of QDs were examined by X-ray Diffraction (XRD) and Transmission Electron Microscopic (TEM) measurements. Orthorhombic crystallite structure of CsPbBr3 QDs without secondary phase formation was confirmed from XRD pattern. The particle size of QDs was calculated by TEM and found to be 7.3 (± 1.1) nm. The optical properties of QDs were studied by recording UV-Visible absorption and PL spectra at room temperature. The absorption spectrum reveals the excitonic peak at 509 nm and PL emission is observed at 514 nm. The chemically prepared QDs were further used to enhance the emission of NLC. Firstly, liquid crystal sample cells were fabricated by conventional polyimide technique. NLC doped with CsPbBr3 QDs were inserted into the sample cell via the capillary action. The filled sample cells were characterized by polarising optical microscope (POM) images and PL spectra measurements. The dark and bright state images of POM demonstrate the uniform alignment and homogeneous texture of liquid crystal molecules in both cells. The molecular alignment is further improved while the light leakage centres and defects were reduced after doping QDs in the host NLC material. This leads to a significant enhancement in absorption and hence the emission of NLC. We found the enhancement in PL intensity by 11% compared to pure NLC. The improved emission of NLC is attributed to modified molecular alignment in presence of QDs. Results based on present work will help to fabricate QDs based display devices with improved the optical contrast and lower the operating voltage
Evaluation of Selected Rare-Earth Scintillators for Gamma-Ray Sensing Applications
Authors: Dhillon Jasjot Singh , Vermani Yogesh K. 
Published: February 2023

Abstract
In the present work, selected dense rare-earth (RE) based scintillators such as gadolinium tantalate (GdTaO4), gadolinium tantalo-niobates Gd(Ta0.8Nb0.2)O4, lutetium based LuF3:Ce, LuAP:Ce, Lu2O3:Yb and Yb2O3 have been investigated for their gamma-ray sensing efficacy. The gamma-ray sensing properties of these RE scintillators have been confronted with modern lead tungstate (PWO) and lead fluoride (PbF2) scintillators being employed recently in high energy physics (HEP) experiments. The attenuation parameters namely linear attenuation coefficient (μ), half value layer (HVL) are compared for these rare-earth scintillators over wide energy range 1keV - 100GeV using Photon Shielding and Dosimetry (PSD) software toolkit. We also attempted to estimate build-up factors (BF’s) of these scintillation materials computed using the online platform Py-MLBUF. Our calculations depicted that scintillators containing high-Z rare earth elements exhibited better gamma-ray detection capabilities when compared with standard lead based PWO and PbF2 scintillators.
Interaction between Cold Atmospheric Plasma Jet and Water Contaminated With Pseudomonas Aeroginosa Bacteria for Decontamination Purpose
Authors: Bousba Houssem Eddine , Saoudi Mouna , Namous Wail Seif-Eddine , Sahli Salah 
Published: February 2023

Abstract
Plasma based treatments are found to be effective in water cleansing. For this purpose, we employed a plasma jet that is extracted at the exit of a flexible plastic tube remotely from its main source. This plasma jet is generated using a gas mixture of argon and oxygen for the sake of producing reactive oxygen species in the solution when submerged safely under water to perform a treatment in the suspension volume. The treated samples consist of distillated water that is contaminated with bacterial cells of Pseudomonas aeroginosa, this bacteria can present extreme threat to the human body and may lead to death. Our study reports the effect of both treatment time and the introduced ratio of the gas mixture introduced to ignite the plasma discharge. Results illustrate that full water decontamination can be obtained after about 12 minutes of treatment using 1.5 slpm of argon gas flow in addition to 2.5±0.2% of oxygen.
Determination of L X-ray satellite lines for Molybdenum (Mo) and Molybdenum trioxide (MoO3) by wavelength dispersion X-ray fluorescence WD-XRF
Authors: Sowjanya P , Vasundhara B , Kishore Babu D 
Published: February 2023

Abstract
X-Ray fluorescence (XRF) is an effective method for chemical profile analysis of various materials. In earlier times, it is only confined to qualitative and quantitative analysis. This wavelength dispersive X Ray fluorescence (WDXRF) will be used to check the nuclear design of different Molybdenum compounds. The study of relative intensity ratios of various satellite peaks of Molybdenum (Mo) and Molybdenum trioxide (MoO3) compounds is associated with their atomic spectral structures. The intensity ratios will give the validity of the Hatree-slater model of different combinations. In this paper, we will present energy versus intensity and data obtained using WDXRF for the compounds Mo and MoO3. From this data, it will be seen that the Lβ line is resolved. From this we conclude that Coaster-Kronig transitions by double vacancy states of L3N4 and L3N5.
A renovative design and fabrication of vortex bladeless windmill
Authors: Sudarshan TA , Bhavya P , Manjesh B C , Kavithanjan K , Akash Krishna R , Mahantesh D , Vakayil Jerin 
Published: February 2023

Abstract
The issues produced withinside the traditional windmills instigate the development of vortex bladeless windmills. Vortex Bladeless is a vortex caused vibrations resonant wind generator. It harnesses wind strength from a phenomenon of vorticity referred to as Vortex Shedding. Basically, Bladeless era consists of a cylinder regular vertically with an elastic rod. The cylinder oscillates on a wind range, which then generates electricity through a trade system. In exclusive words, its wind generators which is not genuinely a turbine. In other words, wind turbines are not real turbines. In this current paper we have tried to upgrade the Vortex windmill which is more comparable to solar panels in terms of functionality and cost-effectiveness compared to everyday wind turbines and entire project uses less planetary area. Through the improvised model we look forward to produce 238.60Wh of power. The work is designed in such a manner that it can be portable i.e., can be carried from one place to another.
A Review Thin-Wall-Tube Energy-Absorbing Structure : Crash-Box
Authors: Memane K , Mashalkar A , Kumar P 
Published: February 2023

Abstract
The sudden impact during a collision of an automobile may cost the life of passengers. Several researchers are working to design materials and structures which can absorb impact-energy before passing it to the passengers. One such solution is the crash-box-structure which is placed primarily on the frontal side, in-between the bumper and main part of an automobile. The crash-box-structure’s ability to absorb energy is influenced by its deformation-properties. Both, the crash-box-structure’s shape and material will decide how it affects it’s deformation. The impact of various geometries and materials on the crash-box’s deformation characteristics is discussed in this article. Moreover, the use of fiber-reinforced composites in the crash-box is also discussed. The surface modification may affect the impact behavior, which is also discussed in this review.
Microstrip patch antenna as a paper moisture sensor
Authors: Bansode P S , Tanti H A , Joshi A C , Gaikwad Y J , Aiyer R C , Gangal S.A. 
Published: February 2023

Abstract
This paper reports the use of non destructive, microstrip patch antenna as paper moisture sensor. Microstrip patch antenna is designed to resonate at 2.4GHz. This design is simulated and fabricated on copper clad type FR4 (εr= 4.4) having thickness of 1.6mm. Patch dimension are 27mm × 30mm and substrate dimension is 63mm × 60mm. The microstrip transmission line is used to provide excitation for the antenna. This design for microstrip patch antenna after fabrication showed a resonance at 2.38 GHz on vector network analyzer at S11=-19.38dB with impedance =49Ω. The variations in frequency in relation with water content in the paper is measured using Vector Network Analyzer by placing wet paper on the patch antenna. Moisture content in the paper was found out by taking wet weight and dry weight of the paper. The model of the wet paper is recommended primarily on the basis of water-dry paper reactions, along with the thickness and surface roughness explaining tendencies of the sensitivity graphs. Paper samples of 13 different types, with different GSM values and thicknesses, havingdimensions same as that of the substrate were tested. From the results it is observed that as the moisture content in the paper increases the frequency decreases. The change in frequency with respect to the moisture content is seen to have quadratic relation with moisture. The variations in the frequency are fitted in the form of equations. The calculated %Mwet indicates an error around ±0-4% in the calculated value as compared to the actual value. The response of sensor is almost linear with respect to the references but the coefficients depend non-linearly with the paper dimension.
Impact of Scintillation Effect on Clear Weather and Fog Conditions using MDM-WDM Modulation Technique
Authors: Anuranjana  , Kaur Sanmukh , Goyal Rakesh 
Published: February 2023

Abstract
The 5th generation optical wireless communication technologies have unique features of higher data rate, scalability in bandwidth, license free spectrum, cost effectiveness, easy deplorability and secured transmission. The role of free space optical (FSO) communication becomes important as the applications of next generation technologies are evolving in almost every sector. In this work, the performance of the terrestrial FSO MDM-WDM link has been investigated through a DP-QPSK modulation scheme at a data rate of 1000 Gbps. The link attenuation has been analysed with the help of Gamma- Gamma and Lognormal scintillation models considering clear weather and varying fog conditions. The link performance has been evaluated through SNR and received optical power for a varying distance of up-to 20 Km.