Investigation of Power on Silicon Adiabatic for VLSI Applications

Silicon - In this article, a novel silicon adiabatic circuit is proposed for low power applications. To achieve efficient performance, the charging and the discharging diodes in the energy recovery...     

Design and Modeling of Polarization-Conversion Based all-Optical Basic Logic Gates in a Single Silicon Ring Resonator

Silicon - The demonstration of all-optical basic logic gates using single silicon micro-ring resonator is presented in the paper. Based on the nature of the pump signal rather than its intensity,...     

Effect of a Metamaterial and Silicon Layers on Performance of Surface Plasmon Resonance Biosensor in Infrared Range

Silicon - Metamaterial based surface plasmon resonance biosensor for enhancement of performance parameters at near infrared wavelengths is presented. The thickness of the metamaterial layer and...     

Investigation of MEMS Piezoresistive Pressure Sensor with a Freely Supported Rectangular Silicon Carbide Diaphragm as a Primary Sensing Element for Altitudinal Applications

Silicon - Silicon and Polysilicon are used as piezoresistive materials in MEMS (Micro Electromechanical system) piezoresistive pressure sensors because of its reproducibility and enhanced...     

Investigation on Slicing Behavior of Single Crystal Silicon Wafer in AWJM and Influence of Micro Dimple Textured Surface for Solar Applications

Silicon - The current investigation focuses on the slicing characteristics of silicon, a hard and brittle solid that is very difficult to cut, with abrasive water jet machining (AWJM) process by...     

Mechanical Treatment of Ceramic Materials Based on Aluminum Oxide, Silicon Nitride, and Silicon Carbide

A comparative analysis of the mechanical treatment of ceramic materials based on aluminum oxide and silicon nitride and carbide is performed. Recommendations for the selection of the type of grinding wheel, the grinding velocity, and the pressure exerted by the wheel on a machined part are formulated.     

Fabrication and Application of TiO2 Based Thin Film Capacitive Biosensor towards Fruit Freshness Detection on Silicon Substrate

Silicon - A growing interest towards healthcare and lifestyle change in recent years has facilitated extensive research in the field of biosensors. In this work, a highly sensitive, robust and...     

Preparation,Characterization, and Dielectric Properties of PP/CaTiO3 Composites for Microwave Substrate Applications

Calcium titanate (CaTiO₃) filled polypropylene (PP) composites have been fabricated through compression molding method. The phase purity of the PP/CaTiO₃ composites was studied using X‐ray diffraction studies. Scanning electron microscopy technique has been employed to study the dispersion of the particulate filler in the PP matrix. The dielectric constant and loss tangent of the composites were measured at X‐band frequency region using waveguide cavity perturbation technique. PP/CaTiO₃ composite has an effective dielectric constant of 11.74 and loss tangent 0.007 at optimum filler loading. The experimental dielectric constant of filled composites was compared with theoretically predicted dielectric constant values obtained using different modeling approaches. The linear coefficient of thermal expansion of PP/CaTiO₃ composites was studied using thermomechanical analyzer.     

Investigation of Charge-plasma Based Dopingless Tunnel FET for Analog/RF and Linear Applications

Silicon - Tunnel FET (TFET) based upon charged-plasma (CP) concept have came out as a potential Metal-Oxide-Semiconductor-Field-Effect-Transistor (MOSFET) replacement as it provides immunization...     

Hyaluronic Acid and a Short Peptide Improve the Performance of a PCL Electrospun Fibrous Scaffold Designed for Bone Tissue Engineering Applications

Bone tissue engineering is a rapidly developing, minimally invasive technique for regenerating lost bone with the aid of biomaterial scaffolds that mimic the structure and function of the extracellular matrix (ECM). Recently, scaffolds made of electrospun fibers have aroused interest due to their similarity to the ECM, and high porosity. Hyaluronic acid (HA) is an abundant component of the ECM and an attractive material for use in regenerative medicine; however, its processability by electrospinning is poor, and it must be used in combination with another polymer. Here, we used electrospinning to fabricate a composite scaffold with a core/shell morphology composed of polycaprolactone (PCL) polymer and HA and incorporating a short self-assembling peptide. The peptide includes the arginine-glycine-aspartic acid (RGD) motif and supports cellular attachment based on molecular recognition. Electron microscopy imaging demonstrated that the fibrous network of the scaffold resembles the ECM structure. In vitro biocompatibility assays revealed that MC3T3-E1 preosteoblasts adhered well to the scaffold and proliferated, with significant osteogenic differentiation and calcium mineralization. Our work emphasizes the potential of this multi-component approach by which electrospinning, molecular self-assembly, and molecular recognition motifs are combined, to generate a leading candidate to serve as a scaffold for bone tissue engineering.     

Structural,Optical and Electronic Properties of Silicon Carbide Doped PVA/NiO for Low Cost Electronics Applications

Silicon - This work aims to study of the effect of increase in an atoms numbers added to the (PVA-NiO-SiC) structures on the geometrical parameters, electronic and spectroscopic characteristics for...     

Evaluation of Plastic Bonded Explosive (PBX) Formulations Based on RDX,Aluminum, and HTPB for Underwater Applications

Aluminized high explosives are known to give better underwater performance. All explosive formulations for underwater targets are filled into warheads and shells by casting method. TNT, a high explosive is used as casting medium due to its lower melting point. Plastic bonded explosives are fast replacing TNT‐based high explosive formulations for the reasons that they are more insensitive and low vulnerable explosives with better shelf life. Few aluminized plastic bonded explosive formulations based on RDX, aluminum, and HTPB have been processed, varying the aluminum content from 0 to 35% and evaluated underwater. The present paper discusses the experimental methodology adopted to evaluate the above formulations for their ballistic parameters, viz., peak over pressure and impulse. Explosion bulge tests have been conducted with each explosive formulation and extent of bulge in test plates is presented and compared with a standard underwater explosive, viz., HBX‐3.     

The Use of Microwave Radiation for Synthesis of a Ceramic Based on Silicon Carbide and Complex Oxides: a Study of Physicochemical Properties

A new composite ceramic material based on silicon carbide and complex oxide is synthesized by the microwave radiation method at a frequency of 2450 MHz. The material is characterized by loss tangent tan = 0.072 – 0.075 and has prospective applications in radio and microwave technology. The material, owing to its radio-absorbing properties, can be used to fabricate heaters for microwave muffle furnaces.     

Corrosion and Oxidation of Silicon Carbide Based on a Nitride Binder in an Aluminum Electrolyzer Side Lining

Refractories and Industrial Ceramics - The main question for understanding the corrosion of a side lining made from silicon carbide based on a silicon nitride binder is whether corrosion of...     

Investigation of Potential of Adsorbed CuO,TiO, RuO2 and MnO2 on Silicon and Carbon Nanotubes as Anode Materials of Metal Ion Batteries

Silicon - Abilities of SiNT and CNT for anodes of batteries are studied. Effects of titanium and copper oxides (TiO and CuO) and ruthenium and manganese oxides (RuO2 and MnO2) on abilities of SiNT...     

Investigation of the Effect of Accelerated Hydrothermal Aging on the Cu Sites in a Cu-BEA Catalyst for NH3-SCR Applications

The influence of hydrothermal aging between 500 and 900 °C for 3 h, on the structure of a Cu-Beta catalyst was studied in this work. The XRD measurements indicated a structural breakdown of the zeolite upon 900 °C hydrothermal aging. This was confirmed from the loss of surface area as measured by BET method. The temperature for the zeolite structure break down was different between the powder bed as opposed to the sample that was washcoated on a cordierite monolith, which was most likely due to slightly different aging conditions and the presence of binders. The strong increase in the intensity of the Cu2p XPS peak indicated that the surface is enriched of copper at higher temperatures due to the zeolite structure collapse. The presence of CuO is usually accompanied by a satellite peak, which was clearly observed at higher binding energies for the catalysts aged at 800 and 900 °C. The XPS results are in good agreement with the UV–Vis experiments, which also point to the formation of copper oxide after high temperature aging.     

Effects of Grain-Boundary Structure on the Strength, Toughness, and Cyclic-Fatigue Properties of a Monolithic Silicon Carbide

An in situ -toughened silicon carbide (ABC-SiC) has been examined in the as-processed condition, where the grain-boundary films are predominantly amorphous, and following thermal exposure at a temperature of 1300°C, where the films become fully crystalline. Previous work has shown that, at elevated temperatures (up to 1300°C), after the grain-boundary films crystallize in situ , only a marginal reduction in strength, fracture toughness, and cyclic-fatigue crack-growth properties is observed, in comparison with those of the as-processed microstructure at 25°C. In the present study, the effect of such crystallization on the subsequent strength, toughness, and fatigue properties at 25°C is examined. Little or no degradation is observed in the room-temperature properties with the crystallized grain-boundary films/phase; in fact, although the strength shows a small reduction (∼3%), the fracture toughness and fatigue-crack-growth threshold both increase by ∼20%, compared with that of the as-processed structure with amorphous grain-boundary films.     

Insight on the Chemistry of Epoxy and Its Curing for Coating Applications: A Detailed Investigation and Future Perspectives

This article is aimed to focus on the developments in the polymeric materials used for coating with special importance to epoxy. A detailed discussion commencing from epoxy derived from both petroleum and plant resources, classification and its application have been elaborated along with various types of curing agents and some potential greener UV-curing techniques used in coating technology. Also detailed discussion on the future perspectives of the polymers in coating has been presented, which may be useful in framing-up the future of polymers from renewable resources via greener route.     

Synthesis,Properties and Applications of BICAP: a New Family of Carbazole‐Based Diphosphine Ligands

A new family of bidentate phosphine ligands based on the biscarbazole backbone has been synthesized and applied in the ruthenium‐ and rhodium‐catalyzed asymmetric hydrogenations of methyl acetoacetate and dimethyl itaconate. The nitrogen atoms in these BICAP ligands allow facile introduction of substituents providing structurally similar, but electronically different ligands, which were used to fine‐tune these reactions to 98% and 55% ee, respectively.     

Properties of New Composite Materials Based on Hydroxyapatite Ceramic and Cross-Linked Gelatin for Biomedical Applications

The main aim of the research was to develop a new biocompatible and injectable composite with the potential for application as a bone-to-implant bonding material or as a bone substitute. A composite based on hydroxyapatite, gelatin, and two various types of commercially available transglutaminase (TgBDF/TgSNF), as a cross-linking agent, was proposed. To evaluate the impacts of composite content and processing parameters on various properties of the material, the following research was performed: the morphology was examined by SEM microscopy, the chemical structure by FTIR spectroscopy, the degradation behavior was examined in simulated body fluid, the injectability test was performed using an automatic syringe pump, the mechanical properties using a nanoindentation technique, the surface wettability was examined by an optical tensiometer, and the cell viability was assayed by MTT and LDH. In all cases, a composite paste was successfully obtained. Injectability varied between 8 and 15 min. The type of transglutaminase did not significantly affect the surface topography or chemical composition. All samples demonstrated proper nanomechanical properties with Young’s modulus and the hardness close to the values of natural bone. BDF demonstrated better hydrophilic properties and structural stability over 7 days in comparison with SNF. In all cases, the transglutaminase did not lead to cell necrosis, but cellular proliferation was significantly inhibited, especially for the BDF agent.