Materials Literature
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This paper presents our results on the significant effect of application of electric field during deposition on various properties of thin SnO2 films, especially in the ultrathin regime. SnO2 films of 25-75 nm deposited on glass substrates without and with the presence of electric field (32 V/cm) during deposition wer…
Tin oxide/multiwalled carbon nanotube (SnO2/MWCNT) heterojunctions were synthesized using the SnCl2 solution method. The interfacial structures, especially the interactions between the SnO2 and MWCNTs, were investigated by field emission scanning electron microscopy, transmission electron microscopy, ultrasonic destru…
During the past several decades, Si nanocrystals (NCs) have received remarkable attention in view of potential optoelectronic device applications. This paper summarizes recent progress in the study of luminescence from Si NCs, such as photoluminescence (PL), cathodoluminescence, time‐solved PL, and electroluminescence…
Hydrogen titanate nanotubes were synthesized by hydrothermal process using 10 M NaOH and TiO2 anatase powder. The material synthesized was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) to ensure the structural and morphological characteristics.…
Y-type hexagonal ferrites with the nominal chemical composition Ba2Ni2-xZnxFe12O22 (0.0 ≤ x ≤ 0.6 with a step of 0.1) have been synthesized by the conventional solid state reaction method and sintered in the temperature range 1150℃-1250℃ to study their structural and magnetic properties. The aim of the present work is…
A new Brønsted acidic ionic salt based on Keggin phosphotungstate anion, [Et3NH]3PW12O40, has been synthesized using 12-phosphotungstic acid, H3PW12O40, and triethylamine. The salt has an ionic liquid-like composition but possesses a high melting point. It was characterized by 1H NMR,13C NMR, FT-IR, and CHN analysis,…
Transformation-based cloaks prescribing infinitesimal and infinite material parameters are difficult to be realized in practical applications. However, the underlying theory of electromagnetic transformation can be used in various applications, such as radar cross section (RCS) reduction. In this letter, we examine sc…
This paper discusses computation of shape derivatives of electromagnetic fields produced by complex 2-periodic structures. A dual set of forward and adjoint problems for Maxwell's equations are solved with the method of moments (MoM) to calculate the full gradient of the object function by the adjoint variable method…
The periodic negative semi-pyramid nanostructures are fabricated in polymer layer via an imprinting-assisted replication process using the differentially shaped, but periodically textured Si-masters demonstrating the effective reduced reflectance of less than 20% over broadband wavelengths ranging from 300 nm to 1200…
Nanoscale impact fatigue tests were conducted to comprehend the relative fatigue performance and failure modes of 100 nm thick diamondlike carbon (DLC) film deposited on a 4 in. diameter Si (100) wafer of 500 μm thickness. The nanofatigue tests were performed using a calibrated TriboIndenter equipped with Berkovich in…
We report for the first time the thermal expansion of NpO2 up to 2000 K and compare it to the one of UO2 and PuO2. Lattice parameters were measured as a function of temperature by in situ X-ray diffraction with neutral, reducing and oxidizing atmospheres. Data for NpO2 under neutral and reducing conditions perfectly s…
An impact of the decomposition products of Poly(butylene succinate adipate) (PBSA) (Bionolle#3001) in the form of polymer chips and nonwovens made of the polymer upon the qualitative and quantitative microbiological profile of the soil in which samples of the materials were incubated was investigated. The mass loss of…
In this study, we pick graphene research as a case study to demonstrate the importance of follow-up monitoring the emerging technology items. Graphene was selected as an emerging technology from MIT(2008) and KISTEP(2009). We analyze the growth, transition, and differentiation of graphene research by keyword mapping t…
A brief review is given to study inhibitive action of Poly (4-vinylpyridine) - Graft - Bromodecane (P4VPBrD) at three degrees of quaternisation (25%, 45% and 60 %) on the corrosion behaviour of pure iron was investigated in desaerated molar sulphuric acid solution using weight loss measurements, potentiodynamic polari…
X-ray diffraction (XRD), Scanning electron micrographs (SEM) and Energy dispersive X-ray (EDX) techniques were used to characterize Mn0.5Zn0.5Fe2O4 nano-particles synthesised by advanced combustion route. The magnetic properties of the as prepared sample were determined by using vibrating sample magnetometer (VSM). Th…
Eu3+ doped CaWO4 phosphors of different concentrations are prepared by a co-precipitation method. The X-ray diffraction patterns and field emission scanning electron microscopy images are investigated. The excitation spectra, emission spectra and the curves of fluorescence decays of the samples are measured. The Judd-…
We present a new kind of zero-index metamaterial composed of periodic array of dendritic cells with continuous long pole, and investigate its electromagnetic characteristics. First, we study the one-level dendritic cell with continuous long pole. The retrieved effective permittivity and permeability of the unit cell s…
采用静电纺丝技术将聚苯胺(PANI)和稀土配合物[Tb(BA)3phen]掺杂到高分子材料(PVP)中, 制备出一类新型的具有光电双功能的Tb(BA)3phen/PANI/PVP复合纳米纤维. 用扫描电子显微镜(SEM)、X射线能量色散谱仪(EDS)、荧光光谱仪及宽频介电松弛谱仪对样品进行了表征. 结果表明, 复合纳米纤维直径为(331±43) nm. 在 276 nm紫外光激发下, Tb(BA)3phen/PANI/PVP复合纳米纤维发射出主峰位于491, 547和585 nm的绿光, 对应Tb3+的5D4→7F6, 5D4→7F5和5D4→7F4跃迁. 当Tb(BA)3phen:PANI:PVP的质量比为15:10:100时,…
The combustion synthesis is a technique using glycine as fuel and Aluminium Nitrate as an oxidizer is able to produce alumina powders in Nano scale. Thermodynamic modelling of the combustion reaction shows variation in amount of gases produced and in flame temperature (combustion temperature) with variation in fuel to…
The characteristics of dynamic strength and deformation on rock with different axial pre-compressions under cyclic impacts were conducted with modified split Hopkinson pressure bar(SHPB).Firstly,the different axial pre-compression stresses were loaded on sandstone specimens before the cyclic impact loadings were carri…