bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and photoluminescence properties of novel red-emitting KMg4(PO4)3: Eu3+ phosphors for UV-excited white-light emitting diodes
Authors: Mehare Chaitali M , Jog Milind , Mehare M D , Dhoble N S , Dhoble S J 
Published: June 2021

Abstract
The trivalent Eu3+ activated KMg4(PO4)3 phosphor has been successfully prepared via solid state diffusion technique. The phase formation and structural morphological studies carried out by XRD pattern and SEM analysis. The photoluminescence excitation spectra centred at 395 nm attributed to 7F0→5L6 energy transition levels. PL emission spectra centred at 593 nm and 613 nm corresponds to 5D0→7FJ( J=1,2) transitions of Eu3+ in the host respectively. The experimental results showed that Eu3+ singly doped KMg4(PO4)3 phosphor under UV excitation gives intense red emissions. The critical Eu3+ quenching concentration (QC) was determined to be 1.0 mol% along with excellent CIE coordinates of (0.6326, 0.3670). All the above results exhibits, the prepared phosphor is promising material as UV excitable red emitting phosphor for w-LED.
Photoluminescence and upconversion emission of Er3+/Yb3+ codoped tungsten tellurite oxyfluoride glasses
Authors: Ansari Ghizal F , Parashar J , Mahajan S K 
Published: June 2021

Abstract
The codoped YbF3 / ErF3 with the optimum composition of TeO2-Li2O-WO3 (TWLEYF) oxyfluoride glasses in which minimizing the fluoride contain were synthesized by melt quenching technique. UV-Vis absorption spectrum of the sample was measured for identification of the absorption levels of Er3+/Yb3+ ions in the glass. Photoluminescence of glass sample produced the intense broad blue emission of Er3+(2mol%) under UV excitation at 380nm. The intense green upconversion at 535nm and weak green at 550nm under 800nm excitation has been measured. Also, a weak blue and red upconversion emission band of Er3+ ions was observed. Further for 2 mol% of YbF3 in TWLEYF samples is attributed to enhance 535nm emission due to energy-transfer process while the red emission is based on non-resonant energy transfer performs. At room temperature green fluorescence decay times of 4S11/2 level of Er3+ ions under 488nm pulse excitation duration at rate < 10ns have been measured. Moreover, 530nm upconversion emission process of tungsten tellurite oxyfluoride glasses were discussed which would be useful for optical devices.
Photoluminescence study of Ce3+ activated blue emitting Ca14Al10Zn6O35lamp phosphors
Authors: Rangari Varsha , Panse V R , Dhoble Samiksha B , Dhoble N S 
Published: June 2021

Abstract
The photoluminescence analytical study of Ce3+ doped Ca14Al10Zn6O35 phosphors is done in this research work. Powder X-ray diffraction technique (XRD) along with scanning electron microscope i.e. (SEM), CIE colour coordinates including their PL properties with emission intensity effect too were analyzed for the characteristics of prepared phosphors. In the instance of Ca14Al10Zn6O35:Ce3+, the emission spectra demonstrates an exclusive 442 nm centered band corresponding to Ce3+’s 4f–5d transition. The result specifies that the Ce3+ activated Ca14Al10Zn6O35 phosphor could find out applications in the light phosphor production.
Synthesis and photoluminescence properties of rare earth doped BaAl2S4 and MgAl2S4 phosphor
Authors: Gharpure A R , Wankhede S P 
Published: June 2021

Abstract
Different synthesis techniques for BaAl2S4 have been described in literature. Conventionally thioaluminates (BaAl2S4) were prepared by solid state reaction. BaAl2S4 was prepared by using BaS and Al2S3 in H2S atmosphere [1, 2]. Sulfurization reduction of multi component oxide precursor was used to prepare BaAl2S4 in CS2 atmosphere at 1050°C. [2, 3]. Oh et al. [4] prepared MgAl2S4 doped with Co2+ by the chemical transport reaction method. All these methods require proper apparatus and they are difficult to handle.
The synthesis method and photoluminescence properties of MgAl2S4:Eu2+ and BaAl2S4:Ce3+ phosphors are reported. In this paper wet chemical co-precipitation method is described for synthesis of magnesium and barium aluminates. BaAl2S4 and MgAl2S4 phosphors doped with Eu2+ and Ce3+ shows strong excitation in nUV region. This method is very simple and does not require H2S gas flow [2]. We successfully prepared MgAl2S4:Eu2+ and BaAl2S4:Ce3+ powders by this method. MgAl2S4 doped with Eu2+ act as blue component in display application.
Structural and optical properties of chromium doped zinc gallate long persistent phosphor prepared by surfactant assisted hydrothermal method
Authors: Kumari Puja , Mondal Amba , Kumar Choudhary Anil , Ambast Deepak K S 
Published: June 2021

Abstract
Herein, CTAB surfactant aided hydrothermal reaction was carried for preparing Cr3+ doped ZnGa2O4. Urea was used as fuel to continue the reaction. By fixing Cr3+ ions conc. to 0.5 mol%, the molar ratio of CTAB was varied. We used XRD, TEM, FTIR, PL, UV-VIS spectroscopy, decay kinetics, and afterglow decay experiments to characterize the samples. XRD data suggested a cubic phase matching with JCPDS card no. 00-038-1240. TEM images confirmed the formation of nanoparticles within the range 20-80 nm. The estimated band gap was around 4.8 eV. Excited by 227 nm UV lights elaborated a wide emission band extended from 600 to 800 nm and peaking at 696 nm. The afterglow decay curve showed a long persistent signal up to 1 hour after ceasing offthe excitation source.
Effect of copper concentration on ethanol sensing performance of Cu-stilbite thick film sensor
Authors: Mahabole M P , Lakhane M A , Naik K B , Kutte V D , Ghadge A , Khairnar R S , Bogle K A , Sabale P B 
Published: June 2021

Abstract
The present study deals with natural stilbite zeolite commonly named as Ca-stilbite. Ion exchange process is carried out for partial exchange of calcium ions by copper ions. Ion exchanged stilbite is characterized by different spectroscopic techniques as XRD, FTIR and EDS techniques. Thick films are deposited on pre-cleaned glass substrates using screen printing technique. The sintered films are finally used for ethanol detecting. The Ca-stilbite zeolite structure is confirmed by the characterization techniques XRD and FTIR. Incorporation of copper ions in stilbite structure can be confirmed by EDS data. The Cu-stilbite films showed good ethanol detectors. The operating temperature, ethanol response, response/recovery nature are observed to be the functions of concentration of copper ions. Higher the copper concentration (0.2M) lower is the operating temperature (90°C) and higher is the ethanol sensitivity (233). It can be concluded that partial replacement of calcium by copper ions in stilbite leads to change in operating temperature and sensitivity.
An introduction to flexible electronics: Manufacturing techniques, types and future
Authors: Sircar Aenakshi , Kumar Hemant 
Published: June 2021

Abstract
Flexible Electronics is an emerging technology in the fields of electronics. These are electronic circuits made on substrates which can be modified into various shapes. It can be rolled or twisted with minimal or no effect on its electronics components and its function. Flexible electronic components are usually made of a bi-layer of thin substrate which can be either plastic, metal or textile or any other suitable material with a second layer of active electronic component. Wide range of its application in solar cells, aerospace and medical fields have increased its demand by many folds. Flexible electronic circuits play a major role in components where density, availability of space, and weight of the material has to be taken into consideration. The following is the review of the current status of it the modern electronic industries, its manufacturing process, its application in various technological fields, and the role it will play in the future
Prediction of vibrational spectroscopic characteristics of bioactive natural product using density functional theory
Authors: Mishra Ashok Kumar , Gupta Vimlesh , Tewari Satya Prakash 
Published: June 2021

Abstract
The present study discusses the applicability of density functional theory to investigate the vibrational spectroscopy of some bioactive natural products implementing variety of functional-basis set combination to find out suitable theoretical model. The DFT at B3LYP/6-31+G (d, p) and at higher level functional-basis set combination have been obtained to be feasible for this purpose. The IR & Raman active vibrations at the normal modes have been obtained by the theoretical computation in the selected natural product namely Isodihydroaminocadambine. The vibrations in the various domains have been ascertained due to C-H stretching, C-H in plane bending, C–H out of plane bending, C–C stretching and other low domain frequencies calculated through the said theoretical approach. The theoretical IR spectra exhibit at most intensity at 3 88 cm−1. The strongest Raman activity has been observed at 3202 cm−1 which is the characteristics of this molecule. The spectroscopic characteristics reported in the present study may be applicable for characterizing the title molecule for exploring its different applications.
Reflectivity simulation by using transfer matrix method
Authors: Keskar D , Survase S , Thakurdesai M 
Published: June 2021

Abstract
Efficiency of optoelectronic devices can be enhanced by using Distributed Bragg Reflector (DBR). Distributed Bragg Reflector (DBR) is a multipair layered structure of high and low refractive indices. High reflectivity of DBR is due to constructive interference of reflected light from interfacial layers of DBR. In the present paper, reflectivity of DBR composed of II-VI compound semiconductor is simulated using Transfer Matrix Method (TMM). In this paper, reflectivity of 4, 8, 12, 16 and 20 periods for the incidence angle of 45+ is simulated. Also, the effect of interchange of constituent layers in DBR stack, on reflectivity is simulated.
Eco-friendly synthesis route of silver nanoparticle: A review
Authors: Gundo Sakshi , Parauha Yatish R , Singh Neelu , Dhoble S J 
Published: June 2021

Abstract
Nanotechnology is concerned with the production and use of nano-sized materials. In the development of nanotechnology, the synthesis of metal nanoparticles is a reliable and environmental friendly step. At the present time, the use of the biosynthesis method in the development of metal nanoparticles has been developed as an alternative synthesis route, removing the limitations of traditional synthesis methods such as physical and chemical methods. In the biosynthesis process, researchers are facing challenges to synthesize stable and geometrically controlled Silver Nanoparticles (AgNPs). In the past few years, the plant-mediated synthesis method has proved to be important in the development of stable, low cost and environment-friendly AgNPs and has been described by many researchers. In the past decade, silver nanoparticles (AgNPs) are the most studied and used nanoparticles due to their unique properties. In this review, we have discussed the eco-friendly synthesis route for the development of AgNPs and its application in various fields.
Evaluation of contact angle of water proof coated fabric made from melt-blown polyester non-woven and acrylic polymeric materials
Authors: Ramaiah G B , Mekonnen S , Solomon E , Melese B , Rao K P 
Published: June 2021

Abstract
Water proof fabrics are hydrophobic in nature. Contact angle measurement is a characterization technique used to gauge how well the water proof fabrics designed and developed is useful in preventing seepage of water through fabric surface. The water-proof coated fabric was developed using polyester non-woven fabric made by melt-blown process as base material. Binder made using acrylic polymer was used for preparation of the water-proof coated fabric using layering technique. Different layer configurations like single and double layers was used to develop the non-woven coated fabric. The developed fabrics was subjected to morphological studies using scanning electron microscope. The water proof coated fabrics was also analyzed for its static contact angle measured using rame-hart instrument. The contact angle was measured for both single layer and double layer water proof fabrics at different positions. The contact angle range was reported from 96° - 58° for single layer water proof coated fabrics. However, for double layer water proof coated fabrics the contact angle reported was in the range of 82°-68°. The contact angle changes for different angle of measurements and orientations. The results show that contact angle is not only a function of hydrophobic character of polyester non-woven fabric base material but also depends on the process parameters like number of layers, the thickness of coating, coating technique and the moisture levels that the acrylic polymer binder coating material absorbs the liquid from its surface. The forces acting on the surface of the coating material mainly influences the contact angle of the coated surface. The water repellency increases with the increase in static contact angle.
Photoluminescent studies of 2, 2’-dihydroxybiphenyl, ethylenediamine - formaldehyde copolymer
Authors: Chakole S P , Nandekar K A , Gurnule W B 
Published: June 2021

Abstract
Polymer resin-II (2,2’-DBPEDF) synthesized by the condensation polymerization of 2,2’-dihydroxybiphenyl (DBP), ethylenediamine (ED) and formaldehyde (F) in acidic medium with molar ratio 2:1:3 of monomer and refluxing in oil bath at 120°C for 5 hr. Synthesized copolymer as a ligand is combined with metal particles such as Ni2+, Cu2+ and Zn2+ ions is in 2:1 molar proportion to get metal complex. The reaction has been finished with refluxed at 60°C for three hour. Composition and structure of organic polymer resin-II have been determined by elemental analysis and molecular weight determination by non-aqueous conductometric titration. The UV-visible, FTIR, proton nuclear magnetic resonance and surface feature and crystalline behaviour of ligand and its complexes were analysed by SEM. Newly synthesized copolymer with metal complexes with copper and zinc metal may be used as supporting material for luminescence 2,2’-DBPEDF-Cu show higher photoluminescence than 2,2’-DBPEDF-Zn.
An investigation of mechanical properties of concrete by addition of sugarcane baggase ash and steel fiber
Authors: Solanke Shrikant S , Pawade P Y 
Published: June 2021

Abstract
Concrete is a powerful industrial substance into construction industry due to the durability and its strength properties. Construction industries have drained natural resources as well as build the poisonous material in the atmosphere by the utilization of raw materials. The substitute items have been found to conserve the natural resources and atmosphere to some degree. Utilization of this atmospheric waste material into the construction industry without much treatment may be a good alternative for natural aggregates. Accordingly, in this paper M30 grade of concrete mix (As per IS 10262:2009) is replaced with natural / industrial wastes like sugarcane bagasse ash and steel fiber. For casting the concrete cube, the replacement dosage of Sugarcane bagasse ash and steel fibre varied from 0% to 20% in the level of 5% and 0% to 1.5% in a level of 0.5% respectively by cement weight. Concrete cube having above ingredient of the mixes was cured for 7, 28 and 90 days. The impact of the mixture of sugarcane bagasse ash and steel fibre on different mechanical properties like compressive/flexural/split tensile strength was examined. It was observed that addition of 10 % of sugarcane bagasse ash and 1% of steel fibre into cement is a promising combination that provides optimum mechanical properties.
Synthesis and Single Crystal X-ray Studies of Cyclic Te(IV) Diiodide
Authors: Singh Puspendra , Singh Priyanka , Shabbaniand Gulam , Butcher Ray J 
Published: June 2021

Abstract
The cyclic tellurium(IV) diiodide, 2-Methyl-1,1-diiodo-1-telluracyclopentane, was prepared in good yields at room temperature by the incorporation of tellurium powder across Carbon–Iodine bond in presence of sodium iodide and acetone. The cyclic tellurium(IV) diiodide compound has been established by proton and 13carbon NMR spectroscopy along with elemental analysis. This compound was further characterized by 125Te NMR in DMSO. Molecular structures of cyclic tellurium(IV) diiodide was also established by single-crystal X-ray studies. In solid-state, molecular structures of cyclic tellurium(IV) diiodidepossess scarcely observed Te…I secondary bonding interactions (SBIs) and two molecule are co-crystallized. Both molecules are interconnected with each other by Te…I secondary bonding interactions. The five-membered rings acquire a twist-boat shape structure. Observed C–Te–C bond angles for molecule A, and molecule B are 85.0(1)°& 85.4(2)° respectively. Similarly observed, I–Te–I bond angles for both molecule A & B are 174.5(1)°&174.2(1)° respectively.
Synthesis and Single Crystal X-ray Studies of Dimesityl Ditelluride: [2,4,6-Me3C6H2Te]2
Authors: Singh Puspendra , Singh Priyanka , Shabbani Gulam , Butcher Ray J 
Published: June 2021

Abstract
The reaction of freshly prepared mesityl magnesium bromide with tellurium powder in anhydrous THF provided the dimesityl ditelluride: [2,4,6-Me3C6H2Te]2. A suitable needle-shaped crystal of dimesityl ditelluride was developed by evaporation of a solution in chloroform. The Te compound was developed with the orthorhombic space group Iba2 with a = 15.2916(7) Å, b = 15.7225(7) Å, c = 14.5272(7) Å and α,□β,□γ = 90°. The geometry about the central tellurium atoms adopt a bent-shaped geometry with torsion angle C10–Te2–Tel–C1 = 87.0(3)°□ and this may be considered a cisoid conformation. Intermolecular C–H….Te interactions give rise to a two-dimensional supramolecular synthons in its crystalline state. The crystal packing diagram shows Te….H [Te1….H5A, 3.2557(5) Å & Te1….H8C, 3.2578(5) Å] hydrogen-bonding interactions which are responsible for associative forces.
Molecular docking studies of N-(benzo[d]thiazol-2-ylcarbamothioyl)-2/4-substituted benzamides as an anti-bacterial inhibitor for E. coli dihydroorotase
Authors: Wanjari P , Bharati A , Wanjari M 
Published: June 2021

AbstractIn pharmacological studies, it is common that drug molecules fail in the final stages of testing. Human, as well as animal trials, have serious regulatory limitations. An alternate option to test energetically suitable binding conformations of synthesized ligands in a dynamic site cavity of a target receptor is to accomplish a molecular docking study. After carrying out the synthesis, characterization, and biological evaluation of molecular properties experimentally, to strengthen and investigate the findings further, we have carried out a molecular docking study to conform binding of ligand N-(benzo[d]thiazol-2-ylcarbamothioyl)-2/4-substituted benzamides against the protein E. coli dihydroorotase (PDB ID 2eg7). Among the synthesized compounds 3a, 3b, 3c, and 3e are found to have promising antibacterial activity. Moreover, the compound 3a is identified as a potential lead molecule with the lowest binding affinity value.
Effect of nanofluid additive and after treatment devices on engine emission - A review
Authors: Pitale Amol , Walke Pramod , Khond Vivek 
Published: June 2021

Abstract
This research paper summaries the research carried by various researcher in the field of Nanofuids and after treatment devices on performance and emission of CI engines. Basically there are two methods of reducing the emission in the engines. First method is completely burn the fuel i.e. converting hydrocarbon and eliminating the emission. Suppose if the fuel is not completely combustible and it produces emission but it can be reduced by treating it before it enter the atmosphere, this is another way of reducing exhaust emission. The major exhaust emission are NOx and PM i.e. particulate matter. It is evident from many research papers that combustion can be improved by adding Nano additives to reduce the emission. Researcher have used various nano particle of various size and material to improve the performance of the engine and reduce emission. Also they have used various after treatment device reduce emission.
Finite element analysis of diesel exhaust fluid tank holding bracket
Authors: Subhedar Aditi , Bohra Bhavesh 
Published: June 2021

Abstract
With low running costs, diesel engines have performance, longevity and reliability. In addition to their benefits, they play a very significant role in the degradation of the atmosphere. Hence after treatment technology is adopted to control the emissions caused by these engines to treat the exhaust gas coming from the engine. Selective catalytic reduction is one such method after treatment that is used to treat the NOx (Nitrogen Oxides) content of the engine’s exhaust gas. Diesel Exhaust Fluid tank holding bracket supports the (Diesel Exhaust Fluid) tank and its complete assembly. Diesel Exhaust Fluid tank and its assembly is responsible for storage, calculated injection of Aqueous Urea Solution 32. Weight reduction of the Diesel Exhaust Fluid tank holding bracket is a major parameter of concern as it helps us increase the payload capacity of the vehicle and also increase the overall fuel efficiency. This paper presents the steps followed while performing the Finite Element Analysis on the existing Diesel Exhaust Fluid tank holding bracket. Based on the results of the existing dimensions, the new dimensions are designed and analysed.
Adsorbent from waste tires as activated carbon for removal of heavy metals from waste water-A review
Authors: Sudame Aruna M , Ugale Manjusha , Raut Ekta R , Kapgate Bharat 
Published: June 2021

Abstract
Globally there is an increasing need for green solutions to environmental challenges. One of the many challenges that plagues our environment is the problem of heavy metals especially those from waste water. Heavy metals are very difficult to remove using simple chemical processes, and when not properly removed during distillation processes it can find its way to drinking water thereby causing serious health challenges like damage of important organs and even cancer. How ubiquitous this problem is and the fact that waste water is part of every thriving urban community calls for very innovative approach to solving this challenge of heavy metals in waste water. This study uses an innovative approach to solving this challenge, by using carbon found in waste tires as an adsorbent for removing heavy metals. Our approach is using a waste material very endemic in our communities to solve another waste material which is causing problem to health and environment. The ripple effect of our approach is that it helps reduce tires waste in our surrounding, while also removing heavy metals from waste water.
Sorption of Cu (II) Ions by Adsorption using Orange Peel
Authors: Malkhedeand S S , Rao Y R M 
Published: June 2021

Abstract
The purpose of the present work is to find out feasibility of the process to remove copper ions from the aqueous solution using powdered orange peel as an adsorbent. Powered activated carbon was also used along with pretreated orange peel to compare the efficiencies. Adsorption is taken into consideration to be one of the most excellent technologies broadly used in international environmental safety regions. Batch adsorption study was conducted to find out the impact related to the numerous strictures like pH, contact period, adsorbent dosage, concentration of preliminary metal Cu(II) ions besides the size of the adsorbent particle on the removal of copper ions from synthetic solutions. The statistics related to the adsorption isotherm which was obtained by carrying out the experiments, performing modeling of such data is very important so that forecasting of adsorption besides knowhow of adsorption. Experimental statistics were investigated with the use of numerous models related to the adsorption and that includes BET model, Freundlich model, Langmuir model as well as Modified Freundlich isotherms model. Equilibrium facts are also evaluated with the use of above-mentioned models related to the process of adsorption.