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。
We design, fabricate, and characterize a frequency-selective surface (FSS) with directional thermal emission and absorption for long-wave infrared wavelengths. The FSS consists of an array of patch antennas connected by microstrips, the ensemble of which supports leaky-wave-type modes with forward and backward propaga…
This paper studied the effects of cations and polymer matrix on the fluorescent properties of quantum dots (QDs). The results indicated that temperature has a greater impact on fluorescence intensity than clay cations (mainly K(+) and Na(+) ). Combined fluorescence lifetime and steady-state spectrometer tests showed t…
In this work, on the basis of finite difference time domain simulations and group theory, by employing regular nanosphere trimers as the main examples, we analyse and discuss the polarization-independent surface enhanced Raman scattering (SERS) phenomenon arising from the rotation symmetry of coined metallic nanomulti…
The properties of Few-Layer Graphene (FLG) change with the number of layers and Amplitude Modulation (AM) Atomic Force Microscopy (AFM) is commonly used to determine the thickness of FLG. However, AFM measurements have been shown to be sensitive to environmental conditions such as relative humidity (RH). In the presen…
Abstract The paper focuses on the Romanche transform margin on the African side of the Equatorial Atlantic, and draws from thermomechanical numerical modelling and subsequent GIS-based thermal history grid processing. Our modelling indicates that the early post-break-up thermal history of the transform margin is contr…
Abstract An ethyne‐bridged Ni 2+ porphyrin‐[26]hexaphyrin‐Ni 2+ porphyrin triad ( 4 ) has been prepared and shown to adopt a dumbbell‐like conformation despite the two bulky porphyrinylethynyl groups at the hinge positions of the hexaphyrin. The 1 H NMR and UV/vis/NIR spectra of 4 revealed that the aromatic nature of…
We present the results of an investigation of surface-enhanced Raman scattering (SERS) by optical phonons in colloidal CdSe nanocrystals (NCs) homogeneously deposited on both arrays of Au nanoclusters and Au dimers using the Langmuir-Blodgett technique. The coverage of the deposited NCs was less than one monolayer, as…
Hydrophobic and oleophobic materials have an important role in daily-life and industry. The hydrophobic and oleophobic property is mainly ascribed to the low surface energy materials and the roughness surface. The hydrophilicity and oleophobicity surface can be achieved by surface modification methods, such as electro…
This contribution describes some peculiarities of the science of oxide surfaces and nanostructures and proposes a simple conceptual scheme to understand their electronic structure, in the spirit of Jacques Friedel's work. Major results on the effects of non-stoichiometry and polarity are presented, for both semi-infin…
One-dimensional core-shell nanostructures consisting of a ferromagnetic cobalt core and a multiferroic BiFeO3 (BFO) shell were fabricated by an artificial two-step methodology. The coupling between the ferromagnetic core and multiferroic shell manifests a significant exchange bias effect which gives a clear demonstrat…
Pyramidal silicon nanospikes, termed black-Si (b-Si), with controlled height of 0.2 to 1 μm, were fabricated by plasma etching over 3-in wafers and were shown to act as variable density filters in a wide range of the IR spectrum 2.5 to 20 μm, with transmission and its spectral gradient dependent on the height of the s…
The galvanic corrosion behavior of Alloy 690 coupled with magnetite has been investigated in an alkaline solution at 30 °C and 60 °C using a potentiodynamic polarization method and a zero resistance ammeter. The positive current values were recorded in the galvanic couple and the corrosion potential of Alloy 690 was r…
In the present study, molecular dynamics (MD) simulation was used to investigate the relationship between wetting behaviour and slip length on patterned substrates. We adopted two solid surfaces of Si(100) and graphite due to similarities in their intrinsic contact angle. Contact angle and apparent slip length were ob…
Epitaxial films of $\mathrm{C}{\mathrm{o}}_{x}\mathrm{M}{\mathrm{n}}_{y}\mathrm{G}{\mathrm{e}}_{z}$ grown on Ge (111) substrates by molecular-beam-epitaxy techniques have been investigated as a continuous function of composition using combinatorial synchrotron x-ray diffraction (XRD) and x-ray fluorescence (XRF) spect…
Immediately after surgical placement of biomaterials, a first step consists in the adsorption of proteins from the biological environment on the artificial surfaces. Because the composition of the adsorbed protein layer modulates the cell response to the implanted material, researchers in the biomaterials field have f…
Abstract A novel elastic mechanoluminescence (EML) material Zn 2 (Ge 0.9 Si 0.1 )O 4 :Mn is reported to exhibit weak persistent luminescence (PL), a dynamic compressive load in the 300–2800 N range, and a nearly perfect linear response. The PL and EML spectra indicate that the EML and PL emissions originate from the 4…
The behaviour of single layer graphene sections under current-stressing conditions is presented. Graphene devices are stressed to the point of failure, and it is seen that they exhibit Joule heating. Using a simple 1-D model for heat generation, we demonstrate how to extract values for the resistivity and thermal coef…
We consider the Euler-Cahn-Hilliard systemproposed by Lowengrub and Truskinovsky describingthe motion of a binary mixture of compressible fluids. We show that the associated initial-valueproblem possesses infinitely many global-in-time weak solutions for any finite energy initial data. A modification of the method of…
10 pages, 5 figures
The Mueller matrix differential decomposition is applied to interpret Mueller matrices of asymmetric gratings and to understand the use of Mueller matrix ellipsometry (MME) in distinguishing the direction of profile asymmetry, as reported in our recent work [Chen et al., J. Appl. Phys. 116, 194305 (2014)]. We show tha…