Materials Literature
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I discuss the accuracy and computational time of the discrete dipole approximation (DDA) when applied to metal nanoparticles. The accuracy of the DDA can be made satisfactory by refining discretization (or increasing number of dipoles), but the required discretization level strongly depends on particle shape and refra…
Three kinds of activated carbons were prepared from Taixi anthracite by NaOH activation. As-obtained activated carbons were adopted as electrode materials to construct asymmetric and symmetric supercapacitors. The electrochemical properties of as-constructed supercapacitors in aqueous electrolyte (3.0M KOH) were inves…
Borosilicate glasses are important as most promising host materials for immobilizing high-level radioactive wastes, like U-, Pu-oxides [1 Chun, K. S., Kim, S. S., Kang, C. H. and Nucl, J. 2001. Mater., 298: 150 [Google Scholar],2 Jantzen, C. M., Brown, K. G. and Pickett, J. B. 2000. WSRC-MS-2000-00307 [Google Scholar]…
亲水性量子点的荧光性能是其作为生物检测探针的一个重要质量指标. 不同结构的量子点在亲水性修饰过程中, 其抵抗荧光淬灭的能力差异较大. 设计与制备具有不同结构和成分的核、核壳量子点, 再通过双亲性高分子对其亲水性改性, 利用荧光光谱监测亲水性修饰过程中的荧光性能变化来度量所合成量子点的光化学稳定性. 实验结果表明,在表面亲水性修饰过程中, 未包覆壳层的裸核量子点其抵抗荧光淬灭的能力最弱; 包覆壳层的核壳量子点, 其抵抗荧光淬灭的能力增强, 且壳层越多, 抵抗能力越强. 壳层的结构和成分直接影响核壳量子点抵抗荧光淬灭的能力, 具有合理晶格匹配的核壳量子点, 其抵抗荧光淬灭的能力较强. 另外, 通过优化设计与制备的核壳量子点经表面亲水性…
Microscopy & Microanalysis 2012 will celebrate our past achievements, present our current research, and inspire us about the future of our field. The meeting will be held in Phoenix, Arizona from July 29–August 2, 2012.
In soft magnetic amorphous and nanocrystalline alloys where anisotropy varies randomly over a length scale determined by the micro structure, there exist a distribution of anisotropies. It is possible to determine such distribution of random anisotropies from the magnetization curve. Anisotropy field distribution of a…
In this paper, we successfully produced Al-Ti-B-C master alloys through adding mixtures of Ti and B4C powders into Al melt. XRD and SEM examinations suggest that only fine TiB2 and TiC particles are formed in the matrix of Al-Ti-B-C master alloy when the Ti/B4C molar ratio is 3/1, while an additional TiAl3 phase is pr…
Purification of polyether polyols made by double metal cyanide catalysis was studied. The removal effect of residual double metal cyanide in the polyols by the methods of adsorption and precipitation-filtration is characterized by the residual concentration of the zinc and cobalt ions which is measured by Inductively…
A conceptual design study of Japan sodium-cooled fast reactor (JSFR) is in progress as the “Fast Reactor Cycle Technology Development (FaCT)” project in Japan. A selector-valve type failed fuel detection and location (FFDL) system is applied to the JSFR design that has an upper internal structure (UIS) with a slit abo…
The key problems in 2D FEM simulation such as the establishment of finite element model, the initial stress loading, the distortion appraisal are solved and 2D FEM simulation model is built to analyze the milling distortion caused by the residual stress. The FEM model is verified by the elasticity theory. Some machini…
In this study, we prepare Cu(ReTa) and Cu(ReTaNx) films via reactive cosputtering of copper (Cu), rhenium (Re), and tantalum (Ta) on a barrierless silicon (Si) substrate in an argon–nitrogen (Ar–N2) atmosphere. These Cu(ReTa) and Cu(ReTaNx) films, after annealing at 630 and 750 °C for 1 h, exhibit two values of resist…
We present printable laser devices formed by dispersing dye doped chiral nematic liquid crystals in solution processible polymers. Unlike current technology, this allows lasers to be formed on a wide variety of surfaces, e.g. paper, plastic, metal.
The above letter [1] stated that the planar artificial magnetic conductor (AMC) with square patch elements can be modeled by a distributed parallel LC network having one or more resonance frequencies. The resonant frequency is where the zero reflection phase or AMC condition occurs and the inphase reflection bandwidth…
Three dimensional (3D) photonic crystals (PhCs) are important for many applications such as photon confinement, optical switching, bio-sensing etc. Their unique property arises from the periodic arrangement of micro/submicro-meter particles. There is a lack of simple method to fabricate the same. Here we present a sim…
The phase-separated structures of the mixed Langmuir–Blodgett (LB) films of behenic acid and hybrid carboxylic acid (FmHnA: CmF2m+1CnH2nCOOH) are investigated by focusing on the effects of the chemical structures of the hydrophobic part of FmHnA and the subphase temperature on the size and shape of the domains. Domain…
High refractive index and high nonlinearity functional PbSe nano-structures have been firstly fabricated with direct laser writing which gives the way for the fabrication of a series of semiconductor nano-structures for photonic applications.
In order to establish an optimal combination of materials used for polymer thrust bearings, two types of components (polyetheretherketone (PEEK) races - polytetrafluoroethylene (PTFE) retainer and PEEK races – PEEK retainer) were tested by rolling contact fatigue. Their wear properties were investigated and it was con…
Within this paper non-inertial cavitation microstreaming is investigated as a method for applying a mechanical stress to biological cells in vitro. A microfluidic device is designed in which microstreaming generated around microbubbles adhered to the floor of the acoustic chamber can be targeted at cells. The repeatab…
Up and down the production line at filter manufacturing plants, adhesives are mixed, extruded and coated onto components. Given the vital role of adhesives in filter assembly, filter manufacturers want to know more about them. Hugh Evans of Franklin Adhesives & Polymers provides some basic information to aid understan…
A family of macrocycles displays and organizes small alcohol substrates in a manner predicted by the rings' intrinsic self-assembly properties.