Materials Discovery最新文献

In this article, different photonic crystal fiber (PCF) background material effects have been studied for sensing and communication applications. By employing different PCF background materials such as BK7, silica, and ZBLAN, some important PCF sensor parameters have been studied by full vectorial finite element method (FV-FEM) with perfectly matched layers. Investigation results reveal that PCF background material strongly affects sensing response, confinement loss, effective area and numerical aperture. Here, ZBLAN is found to be a prominent prospect in sensing and communication applications for higher operating wavelength (≥1.55 μm). Additionally, a comparative analysis of other parameters of the PCF has been done in a precise manner.

The green emitting phosphor was YPO₄ co-doped with Gd³⁺, Tb³⁺ and synthesized by the precipitation method. The X-ray diffraction (XRD) analysis shows structural purity of as-synthesized phosphors. The photoluminescence (PL) properties including excitation (PLE) and emission (PL) spectra in the vacuum ultraviolet (VUV) or ultraviolet region were measured. From the emission spectra monitored at different excitation wavelengths, the two-step energy transfer process was confirmed with theoretical visible quantum efficiency was found to be 155%, 159% and 162% under excitation wavelengths of 150, 185 and 224 nm respectively.

Dye sensitized solar cells (DSSCs) receive lots of attention as a suitable device in converting sunlight to electricity. A great deal of work has been carried out to develop gel polymer electrolytes (GPEs) and one strategy is introducing ionic liquids (ILs) to eliminate some adverse effects and also to improve ionic conductivity. The composition 15% polyvinylidene fluoride (PVdF): 37% ethylene carbonate (EC): 37% propylene carbonate (PC): 11% 1 butyl 3 methyl immidazolium iodide (IB 3M II) showed the highest conductivity. It was a good anionic conductor. IL has caused reduction of crystallinity which assists to enhance conductivity.

Engineering design process consists of three main parts: material selection, components dimensioning and the choice of production technology. The material selection relies on the knowledge of material behavior in different loading conditions. Due to their wide application, majority of research still deals with characterization of metallic materials. Innovative materials hold potential so research of characterization and modeling of their behavior is increasingly getting into focus. Therefore, it is important to resolve main objectives required for characterization of these materials. This paper discusses development of procedures required for effective soft tissues characterization, based on previously developed ones for metallic materials characterization.

The structural and electronic properties of icosahedral Ru₁₃@Pt_42-nMo_n (n = 0–18) nanoclusters are studied by the density functional theory. Through the analysis of excess energy, core-shell interaction energy and dissolution potential, we found that the addition of Mo atoms on the surface enhances the stability and dissolution resistance of Ru₁₃@Pt_42-nMo_n (n = 0–18) NCs. The difference charge density and Bader charge show that the electrons transfer from core to shell. Moreover, the trend of electron transfer is confirmed by Bader charge. The Ru atoms lose more electrons with increasing the number of Mo atoms, Pt gaining more electrons when the coordination number of Pt-Mo increases, and Mo donating more electrons if the coordination number of Mo-Pt increases. Besides, the d-band center of Mo exhibits a negative relationship with coordination number of Mo-Pt.