Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
在不同表面活性剂辅助的水热条件下合成出纺锤形、花束状、纳米束和削角八面体形的YF3：Eu3＋纳米发光材料,对其结构和性能进行了表征.XRD分析表明：样品为结晶良好的正交相YF3.由FESEM与TEM照片可见,不同表面活性剂的条件下,所合成样品的形貌不同.SEAD显示所得样品分别为多晶和单晶结构,EDX显示所得样品中含有F,Y和Eu三种元素.荧光光谱表明：YF3：Eu3＋纳米晶的最强发射峰位于591nm,对应Eu3＋的5D0→7F1的磁偶极跃迁发射,说明Eu3＋占据YF3基质中Y3＋晶格点的C2对称格位上.不同形貌样品的荧光光谱强度不同.
A selective list of books, databases, websites, etc. for conducting research related to apparel and textiles.
Η παρούσα διπλωματική εργασία εκπονήθηκε στο τμήμα Ηλεκτρολόγων Μηχανικών και Τεχνολογίας υπολογιστών του πανεπιστημίου Πατρών και το θέμα της αφορά τη μελέτη σφαλμάτων στο δρομέα τριφασικής σύγχρονης μηχανής έκτυπων πόλων με τη δημιουργία δισδιάστατου μοντέλου πεπερασμένων στοιχείων. Σκοπός της διπλωματικής εργασίας…
A selective list of books, databases, websites, etc. for conducting research related to apparel and textiles.
Designing new materials with improved or tailored properties is one of the main goals of the chemists. Two common ways are mainly used to get a material with improved or new properties: blending or chemical synthesis. Chemical synthesis is an unlimited method to get new substances with well-defined properties even it…
A selective list of books, databases, websites, etc. for conducting research related to apparel and textiles.
A weekly roundup of information on newly offered instrumentation, apparatus, and laboratory materials of potential interest to researchers.
Due to their finite sizes, the surface and interior structures of nanoscale materials prepared by mechanochemical routes may have particular importance for their chemical and physical properties. The structure-property relationships in nanoscale materials is also an area where there is a large scope for further resear…
In the 3D network [Rh(bpy)(3)][NaCr(ox)(3)]ClO(4) (ox = oxalate, bpy = 2,2'-bipyridine) phonon-assisted as well as resonant energy migration within the R(1) line of the (4)A(2) --> (2)E transition of Cr(3+) has been identified. The latter is dominant below 4.2 K, and in a fluorescence line narrowing spectrum, it manif…
We propose a new indirect x-ray and gamma-ray detector which is comprised of a scintillating crystal coupled with an amorphous selenium (a-Se) metal-semiconductor-metal (MSM) photodetector. A lateral Frisch grid is embedded between the anode and the cathode to provide (1) unipolar charge sensing and (2) avalanche mult…
Flat panel selenium detectors (1) have been commercially available since 1998 (2). The MTF of these detectors can approach the theoretical SINC function for the pixel size (3). Detectors can be designed with selenium thickness suitable for absorption of the range of x-ray energy for the modality (4, 5). For higher ene…
The aim of this work was to study the modification of the structural, chemical and optical properties, on the surfaces of certain commercial polymers, produced by plasma immersion (PI) and plasma immersion ion implantation (IIIP). Polymers investigated include polyvinyl chloride and polyethylene terephthalate. Plasmas…
We consider two type of upper Hessenberg matrices which determinants are Fibonacci numbers. Calculating sums of principal minors of the fixed order of the first type leads us to convolved Fibonacci numbers. Some identities for these and for Fibonacci numbers are proved. We also show that numbers of compositions of a n…
WHY USE A RADIOISOTOPE? When researchers contemplate using a radioactive compound there are several things they have to consider. First and foremost, they must ask the questions: is a radioisotope necessary, is there another way to achieve our objectives? The reason for this is that radioisotope use is governed by ver…
ADVERTISEMENT RETURN TO ISSUEPREVCommentComment on "Flue Gas Desulfurization with an Electrostatic Spraying Absorber"Amitava Bandyopadhyay*View Author Information Department of Chemical Engineering, University of Calcutta, 92, APC Road, Kolkata 700 009, India*To whom correspondence should be addressed. Telephone: +91-…
We study the problem of a single Dirac fermion in a quantizing orbital magnetic field, when the chemical potential is at the Dirac point. This can be realized on the surface of a topological insulator, such as Bi2Se3, tuned to neutrality. We study the effect of both long range Coulomb interactions (strength alpha=e^2/…
The bioavailability and fate of Zinc (Zn) in soils is influenced by reactions occurring at the water-mineral interface. Understanding Zn interaction with mineral surfaces is essential to the understanding of Zn fate and toxicity. In this study, adsorption experiments investigated the impact of ligands and pH on the ad…
Abstract Reinforcement presence affecting corrosion threshold concentration, Ct, determination and time‐to‐corrosion, Ti, has been investigated. Elevated Ct and decreased Ti due to reinforcement physical obstruction on the path of chloride ingression into concrete has been examined with finite element modeling. Result…
International Journal of Corrosion publishes research dedicated to understanding, managing, and preventing corrosion in all its manifestations. The journal welcomes the submission of both fundamental and highly applied studies.
We extend the recently developed converse NMR approach [T. Thonhauser, D. Ceresoli, A. Mostofi, N. Marzari, R. Resta, and D. Vanderbilt, J. Chem. Phys. \textbf{131}, 101101 (2009)] such that it can be used in conjunction with norm-conserving, non-local pseudopotentials. This extension permits the efficient ab-initio c…