The goal of this research was to study the efficiency of the silica-modified, highly selective synthesized carbon molecular sieves for nitrogen separation in the methane purification process. For this purpose, carbon molecular sieves obtained from pistachio and walnut shells were impregnated in their raw form by means of phosphoric acid as an activator agent, and then cured with nano silica with different

Despite several studies focusing on producing sustainable concrete with nonconventional materials, there are short-term and long-term lapses in behavior of some of the concretes. This study, with a main focus on durability performance, explores strength and behavior of manufactured sand concrete containing alcofine and zinc oxide in severe environmental conditions. Alcofine and zinc oxide were added

Machining of multidirectional Hybrid Fiber Reinforced Composite (HFRC) is a challenging task because of defects like matrix cracking, fiber pullouts, delamination, burr formation, and heat affected zones. The current study is focused on machining and characterization of in-house fabricated HFRC made of carbon and silica glass fiber using Abrasive Jet Machining (AJM). Machining of holes in fabricated

Thermoelectric properties of AA-stacked bilayer SiC in presence of a magnetic field and a bias voltage were studied using the tight binding model. Green function method was applied to calculate thermal conductivity and Seebeck coefficient under the influence of bias voltage and external magnetic field within the linear response theory. We obtained that the effect of bias voltage is to increase energy

In present research AZ91D/SiC composites were developed using advanced vacuum assisted stir casting process. The tribological properties of AZ91D/SiC composites under dry, oil and nanofluids lubricating conditions were investigated. The nanofluids were prepared by adding the silicon carbide (SiC) nanoparticles to the soluble oil with different weight percentages (1 wt.%, 1.5 wt.%, 2.0 wt.%) for experimentation

An inexpensive spray pyrolysis technique was effectively used to form a p-type SnSb2S4 thin film on n-type Si wafer for the first time to produce SnSb2S4/n-Si heterojunction. The capacitance-voltage estimations of the SnSb2S4/n-Si heterojunction have been recorded in the dark condition at 1 MHZ and demonstrated that the junction has an abrupt junction behavior. The dark current-voltage curve showed

The machine learning methodology is gaining immense exposure as a potential methodology for solving and modelling the machining behaviour of advanced materials. The present paper deals with the application of machining learning approach in analyzing and predicting the effect of reinforced silicon carbide (SiC) particle size on the erosion behaviour of silicon carbide reinforced polymer composites.

In order to improve the sustainability of cementitious composites used for repair and construction applications, environmentally friendly materials can be incorporated as components in the composites. As materials with a higher ductility are preferred for the repair of structures such as pavement, short fibres can be incorporated into cementitious composites to improve the flexural and tensile strength

This paper introduces an experimental investigation of micro hole drilling on two different categories of material such as silicon and german silver using micro electrical discharge machining (μEDM) process. The conductivities of the two materials are of different levels; silicon being a semiconductor has relatively much lower electrical conductivity as compared to german silver which is an alloy of

In this paper, 2-D analytical models of channel central potential, threshold voltage, subthreshold current and subthreshold swing for graded channel double gate (GC-DG) Junctionless FETs (JLFETs) have been presented. The 2-D Poisson’s equation has been solved to determine the channel central potential by parabolic approximation method with appropriate boundary conditions. The minimum potential for

The Frequency Shift Keying (FSK) dual-transmission mode for short-range communication using the silicon microring resonator arrangement is proposed. FSK generated by an optical modified add-drop multiplexer embedded gold grating connected to three other microring resonators. The proposed system consists of a transmitted microring with two nano-ring phase modulators, which connected through a 10 km

Following our interest in exotic silylenes, here we compare and contrast 20 novel five-membered cyclic silylenes, including saturated (sila)0–4 cyclopentasilylenes (1–10) and unsaturated (sila)0-4cyclopentasilylenes-3-ene (1′-10′), reached at B3LYP/6–311++G** level of theory. Arduengo-type silasilylenes 1′-10′ turn out more stable than their corresponding 1–10, for showing higher singlet-triplet energy

This investigation reports the preparation and properties of thermoplastic polyurethane/silica nanocomposite prepared via melt mixing process. In this case, nanosilica at different loading was mixed with a polyester-based thermoplastic polyurethane (TPU). The dispersion of nanofiller was studied by the SEM and TEM analyses. The nanocomposite with optimal dispersion of nanofiller has better filler-polymer

Purpose Wheat (Triticum aestivum L.) is a sensitive plant for both biotic and abiotic stresses and directly losses the production rate under these stresses. The beneficial role of silicon has been explored in the beginning of twentieth century. Therefore the current experiment was carried out to explore the effect of silicon on defense system of wheat by antioxidant enzymes assay. Methods In this study

The effect of thermal treatment on microstructure and tribological behavior of Al-7Si/ZrSiO4 reinforced composites has been investigated. Composites with 5, 10 and 15 vol.% of ZrSiO4 particles were produced using stir casting process. Produced composite samples were then further subjected to T6 heat-treatment by subjecting the cast samples for solution treatment for 4 h at 540 °C followed quenching

In recent low-power electronics industry, Tunnel field-effect transistors (TFETs) have shown the superior performance such as decreased leakage current and lower subthreshold slope (SS). Previously available research work have recognized the fact that the precise evaluation of linearity is critical in short channel devices. The linearity analysis of double gate vertical TFET using hetero-dielectric

Silicon (Si) and potassium are known to impart tolerance against numerous biotic stresses in crop plants. A study was conducted to determine the effect of diatomaceous earth (DE), a soil-applied Si source and soluble silicic acid, a foliar applied Si source at two levels of potassium for their efficacy against pink stem borer (PSB) incidence and damage in wheat under field conditions for two seasons

In the present report, a photonic crystal based micro-ring resonator (MRR) structure is proposed which is very compact in size and has very fast response and is employed for temperature sensing purpose. Temperature sensing application for both the single MRR and cascaded MRR is illustrated in this paper. The sensitivity of the reported structure is increased from 2.9 nm/°C to 3.4 nm/°C by cascading

Herein, we prepare vertical and single crystalline silicon nanowires (SiNWs) via a one-step metal-assisted chemical etching method in aqueous NH4HF2/AgNO3 solution. The effects of silicon substrate resistivity and concentrations of NH4HF2 and AgNO3 on the etching process were examined. Two properties were studied, the morphology and the wettability of etched layers. The morphology of the silicon nanowire

In the present study, we report the physical and optical properties of low-cost glass (soda-lime silicate glass) fabricated from local minerals, obtained from Hazara division Khyber Pakhtunkhwa, Pakistan. Zirconium dioxide (1–3%) was added as a nucleating agent to investigate its effect on phase, density, hardness, and optical properties of soda-lime silicate glass. In the obtained glass-ceramic materials

This paper assesses methods for the fabrication of single-sided electrically conductive tape. Silicone resin, dichlorobenzoyl peroxide, and various types of carbon fillers were used to prepare pressure-sensitive adhesives. Various carbon black and graphene filler concentrations in the range 1 to 25 wt.% were tested, whereas for carbon nanotubes the range was 0.25 to 10 wt.%. The adhesion, shear strength

This work was mainly aimed to synthesize new ceramic composites based on nano-bioactive glass (nBG) and magnesium phosphate ceramic (MgP) with different ratios using the sol-gel approach in order to overcome the limitations of both materials. The glass was based on 85SiO2-10CaO-5P2O5 (mole %), and MgP was based on the formula; Mg3(PO4)2. The obtained composites were characterized by DTA, XRD, FTIR

This study investigates the effect of Strontium (Sr) grain modifier addition on Al-9Si alloy and B4C reinforced composite fabricated by two step gravity casting technique. The optimum level of Sr was identified as 0.08 wt.% for complete modification. The modified cast components were thermally treated by T6 temper to enhance the tribo-mechanical properties. Metallographic observation revealed the transformation

In this research, nanocomposite latex based on polystyrene-co-2-ethylhexyl acrylate with layered silicate was synthesized by emulsion polymerization procedure. For increasing compatibility between the organophilic montmorillonite (Cloisite 30B) and polymer matrix, the Cloisite 30B was reacted with vinyltricholorosilane as a coupling agent to replace the edge hydroxyl groups of the layered silicate

Controlling pore structure, e.g. pore diameter, size and distribution of porous silicon (PS) is highly needed for technological applications such as microfluidic operation and filtration in which the pore size and shape can block the entrance of some species or increase its concentration or purity by separation. In the present study, highly doped p-type silicon is utilized to prepare PS with different

The SiC reinforced z-pinned composites are becoming advantageous in the field of aerospace and defense sector due to their superior mechanical properties. The reinforcement of SiC particles makes them difficult to machine with conventional machining processes. In the present research investigation, the micro-slicing of SiC reinforced z-pinned composites has been attempted using wire electrochemical

Octa(3-aminopropyl)octasilsesquioxane and DAB-AM-16 dendrimer, due to their specific chemical and physical properties, give wide application in various fields of science. Because they have a large number of NH2 reactive groups at their ends, they are capable of interacting with different substances, generating in this way different compounds with enormous analytical potential that can be used in the

Corn plants are highly demanding of nitrogen and the application of silicon has been studied because it minimizes stress from different natures, and for the better utilization of some nutrients by the plants. Thus, the response of the plant to N can be increased by its association with silicon. The present study had the objective to evaluate the dry matter production, accumulation of nitrogen and silicon

This communication presents the performance analysis and impact of low frequency flicker noise on a dual dielectric pocket heterojunction silicon on insulator (SOI) tunnel FET (TFET). The proposed TFET structure is well optimized for different gate-source underlap length and various thickness of δp+ Si1-xGex layer. It offers an ON current of 1.16 × 10−4 A/μm providing a high ON/OFF ratio of 3.49 × 1012

This present investigation deals the role of surface functionalized crystalline nano-silica addition into epoxy resin on fatigue, fracture toughness and drop load impact damage behaviour with various stacking sequence of E-glass fibre. The main objective of this current investigation was revealing the importance of surface-functionalized crystalline nano-silica particle in E-glass fibre reinforced

In this article, the variable thermal conductivity which it depending on temperature gradient in context of the photothermal excitation process of a semiconductor elastic material is studied. In the presence of Hall current effect the governing equations is introduced in one dimension subjected to thermal ramp type. The interaction between thermal-elastic-mechanical-plasma waves are used during the

In this paper, a new structure: triple work function metal gate SOI MESFET, intended for integration into the deep-submicron CMOS technology, is proposed. The gate of the device consists of three different materials which are laterally merged into one. The difference in the work function of dissimilar gate materials introduces two step changes in the profile of channel potentials which screens the

Porous silicon (PSi) has been established as a promising candidate for a variety of applications in many fields of science and technology. Currently, free-standing PSi is receiving an increasing attention for biomedical applications, such as drug delivery carriers and bio-sensing. In this study, fabrication of free-standing PSi film with attractive structural and optical properties for a prospective

The presence of heavy metals in water is one of the major concerns in the public health area. So, the characterization of inorganic compounds toxicity and their detection, speciation and removal are some of the biggest environmental challenges today. Within this context, the present work evaluated the effect caused by Ni2+ in neuronal autofluorescence recorded in brain slices. Besides, a bioinorganic

An experimental study was conducted to investigate the interfaciale adhesion between molten silicon and TiB2, ZrB2 and HfB2 ceramics by using the sessile drop technique. Contact angle measurements were performed as a function of wetting time at 1703 °C. The interface between silicon and ceramic was analyzed using SEM-EDS. The dependence of adhesion energy, Wad, on elastic parameters of these systems

The Editor-in-Chief has retracted this article [1] because Figure 4 and Figure 5 appear to show cobalt oxide nanoparticles and not iron oxide nanoparticles as stated in the article. The data reported in this article are therefore unreliable.

The original version of this paper was unfortunately published with an error in the order of authors and their corresponding affiliations. The correct data is shown above.

This study focus on the effects of silicon inclusion carbonaceous particulate on the hardness and microstructural properties of carburized low carbon steel, at constant temperature of 900 °C with different holding time from 2 to 5 h. The cow bone and coal dust composite particles were varied with 20% CaCO3 used as the energizer. Hardness and microstructural testing of the various specimens were then

In this work, the effectiveness of various dielectric passivation materials such as SiO2, Si3N4, Al2O3 and Si3N4/Al2O3 on the DC & RF behaviour of InP-HEMT (High Electron Mobility Transistor) was analyzed using TCAD (Sentaurus) tool. The InP HEMT structure used in this work features a novel T-Gate structure with Pt sinking technology to alleviate short channel effects (SCEs), double-Si-δ-doping technique

In this study, the lanthanide-doping (Ce3+, Sm3+, Eu3+ and Tb3+) effects on the formation of leucite (KAlSi2O6) by sol-gel synthesis were investigated. The phase purity and morphological properties of lanthanide-doped specimens have been estimated. The proposed sol-gel synthesis route is suitable for the preparation of mixed leucite-kalsilite ceramics doped with Sm3+, Eu3+ and Tb3+ (up to 10 M %).

Weldability, microstructure evolution and tensile strength of an aluminium alloy (AA6082) and of two category of composites with AA6082 matrix reinforced with Si3N4 and SiC particles during friction stir welding (FSW) were investigated. 5, 10 and 15 weight percentage of reinforced particle were used in each category. FSW was carried out as per the parameters selected by Taguchi L-9 orthogonal Array

Thick layer of polycrystalline silicon (poly-Si) grown by Atmospheric Pressure Chemical Vapor Deposition (APCVD) is still a reference material in a number of applications, despite the high thermal budget of this technique. This work presents a material study of undoped poly-Si layers of different thicknesses, using different characterization techniques such as secondary electron microscope in backscattered

In this work, we have analyzed the characteristic J-V of vertical multijunction solar cells. We have also offered a design of a monolithic compact solar module with cells electrically connected in series. The extracting of the electrical parameters of multi-junction solar cells from characteristics data J-V such as: J0, saturation current density; Rs, series resistance; Rsh, shunt resistance; n, ideality

In present work, the role of the oxygen potential (PO2) and oxygen ion (O2−) concentration for removing phosphorus (P) during CaO–SiO2–Al2O3–FexO slag refining was studied by on-line measurement of oxygen activity in molten silicon (Si), FactSage calculation, Raman spectroscopy and nuclear magnetic resonance (NMR) spectroscopy. The results show that the addition of FeO from 0 to 9.25 wt% in slag can

This paper addresses reliability issues associated with temperature of Ferroelectric Dopant Segregated Schottky Barrier Tunnel Field Effect Transistor (Fe DS-SBTFET). The simulated results are compared with Dopant Segregated Schottky Barrier TFET (DS-SBTFET). This is achieved by varying the operating temperature from 300 to 500 K. DC parameters such as ION/IOFF ratio, drain current characteristics

To study the effect of the Egyptian nepheline syenite raw materials on the sinterability of the ceramic tiles, four batches with concentrations of nepheline syenite (0, 5, 10 and 15%) were prepared. The four batches were ground, mixed, shaped, pressed and fired at temperatures from 1160 °C to 1260 °C. Some technological behaviors of the samples were measured in dry, green state and after firing at

The silica-ortho-phenylenediamine(RHAOPDA) derived from Rice Husk Ash and o- phenylenediamine (OPDA) were synthesized. The prepared material was characterized by different techniques; N2- adsorption-desorption measurements of the synthesized material showed that the surface area for RHAOPDA is 25.10 m2 g−1 with a mean pore diameter of 15.10 nm. CHNS and FT-IR analyses proved that the o-phenylenediamine

Magnesium shows potential for bioimplant applications because of its high biocompatibility and equivalent bone strength. However, the high corrosion rate of magnesium and magnesium alloys in the physiological environment results in the rapid evolution of H2 gas, which is lethal to the neighboring tissues. With an intention to reduce the corrosion rate, magnesium alloy AZ91D is reinforced with nanophase

In this research work, the performance determining criteria’s (PDC) measures like mechanical, tribological and thermo-mechanical etc. of AA2024-SiC alloy composite (i.e. ASC-0; ASC-2; ASC-4; ASC-6) are analysed using hybrid Analytic Hierarchy Process (AHP) and Technique for Order Preferences by Similarity to Ideal Solution (TOPSIS) technique (a Multi-Criteria-Decision-Making (MCDM) technique; computationally

Stable cordierite glass-ceramics were prepared from natural kaolin, silica sand and magnesite as raw materials. Furthermore the effect of fluorine additions was tested by addingAlF3 or MgF2tothe glass composition. Stable cordierite was crystallized in all glass-ceramic samples during thermal treatment at temperatures in the range from 900to 1200 °C. In the microstructure cordierite, crystals of sizes

In this study oil palm shells (OPS) are used as coarse and fine aggregate in making of light weight concrete. OPS are used as aggregate by many researchers but using them as both coarse and fine aggregate in concrete. Concrete with OPS as fine and coarse aggregate are examined for alkali-silicate reaction using concrete motor bar test and concrete prism test. Heat of hydration in lightweight concrete

Purpose Polymer Nanocomposites are advanced engineering composites with enhanced properties. These materials play a central role in various industrial sectors. The growing awareness of the key parameters (which influence the physical properties) with different combination of matrix-reinforcement, are making them more attractive in various applications. Machining of these materials is a challenging

The recycling of industrial waste clays for production of an interesting ceramic product is the main goal of the present research work. Ceramic bodies were prepared using Feeders or Cyclons waste clays, sand and feldspar. 0.0, 15, 20, and 25 wt.% of sand were added at the expanse of kaolin (75-50 wt.%). Constant mass percent (25 wt.%) of feldspar was added for all ceramic compositions. The designed

In this work, porous silicon was preparation by electrochemical etching and the MgO thin film by sol-gel technique. The structural properties of MgO NPs were studied using XRD and the morphology properties by field emission scanning electron microscopy. The electrical properties; spectral responsivity, detectivity of the photodetector were measured. The Spectral responsivity of MgO/p-PSi/Si photodector

Application of silicon (Si) and salicylic acid (SA) mitigates plant stress; however, this effect is not known under nitrogen (N) deficiency conditions in rice plants. The objective of the present study was to determine whether foliar application with a soluble form of Si and SA, individually or in combination, could mitigate N deficiency stress in rice plants. The treatments consisted of application