Materials Literature
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We present a simple strategy for the fabrication of porous carbon nanofibers (see figure). This procedure produces thin webs by electrospinning a polymer solution containing different concentrations of zinc chloride and subsequently thermally treating the system. Their resulting surface area and good electrical conduc…
Quenching upon aggregation: 11-Mercaptoundecanoic acid (11-MUA)-protected Au nanoparticles (11-MUA-AuNPs) are much more stable and fluoresce much more strongly than the corresponding unmodified AuNPs. After addition of 2,6-pyridinedicarboxylic acid, the 11-MUA-AuNPs bind to HgII with both high sensitivity and selectiv…
The antifogging properties of mosquito compound eyes (see figure) result from their elaborate superhydrophobic surface structure, which consists of hexagonally non-close-packed nipples at the nanoscale and hexagonally close-packed hemispheres at the microscale. A soft-lithography approach is adopted to fabricate artif…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
Extract Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
Air-core superconducting transformers incorporate the function of shunt reactors, thus they can be used in high-voltage high-capacity applications. They result lighter than their traditional counterpart while requiring heavy metallic shields. However they may represent an effective alternative to traditional transform…
PDF | An investigation into the influence of low copper contents on the hot ductility of C-Mn-Al steels has been carried out in order better the understanding on the problem of “hot shortness”. Previous work has suggested that this problem results from the segregation of Cu that occurs at the surface of the steel as a…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
This work describes electroless deposition of copper layers onto a polyimide (PI) film. The film was modified by etching with 1.0 M KOH solution treatment, and an activated Ag thin film was developed on this surface using 0.1 M AgNO 3 . The Cu layers were coated on the activated surface of polyimide films by electrole…
To improve the oxidation protective ability of SiC coating for carbon/carbon ( C / C ) composites, MoSi 2 was introduced in the SiC coating by infiltration technique. XRD and SEM analysis show that the SiC coating obtained by pack cementation is a porous structure with a thickness of about 60–100 μm. After infiltratio…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
The plasma treatment on SiO 2 substrate surfaces increased the oxygen-containing functional groups or the polar component of the surface free energy and, the wetting characteristics of the underfills/ SiO 2 . The plasma treatment condition which gave the smallest contact angle between the underfills and SiO 2 was an o…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
We report a detailed microstructural study of red phases obtained in the crystal growth of the 2212 superconductor from Bi-Sr-Ca-Cu-O melts (Bi : Sr : Ca : Cu = 4 : 3 : 3 : 4 or 2 : 2 : 2 : 4) during cooling from 1000–1050°C. Crystallization from temperatures well above 1000°C leads to quantitative formation of red cr…
A nondestructive method of the simultaneous analysis of hydrogen and helium in combination with the technique of studying hydrogen migration provides fundamentally new information about the hydrogen behavior in metal-hydrogen systems: about hydrogen migration in metals directly under irradiation and about the mutual e…
The elemental composition and the nature of the chemical bond at the surface of two vanadium-palladium alloys are studied as functions of the sample warm-up temperature by x-ray photoelectron spectroscopy. The obtained results are explained in the framework of segregation theories for ternary systems of strongly dilut…
ZnSe nanoparticles embedded in SiO2thin films were prepared by sol-gel method using zinc acetate dihydrate, selenic acid and TEOS as source materials. The ZnSe nanoparticles/SiO2thin film composites were deposited on the glass substrate by dip coating technique. FESEM images show that morphology of embedded ZnSe nanop…
The intergranular microstructure in a liquid phase sintered silicon nitride based ceramic may be viewed as an oxynitride glass-ceramic. This work is concerned with the incorporation of yttrium B-phase, which is a five-component phase, into the intergranular regions of silicon nitride ceramics. The silicon nitride mate…
The research on the sintered Sm2Co17 Permanent magnets prepared by metal injection molding is still at the exploratory stage. Carbon and oxygen are two key factors that influence the magnetic properties. In this article, the effects of oxygen and carbon on the properties and microstructure of the magnets have been stu…
Silica fillers are often added to elastomer to improve performance in commercial applications. Mixing with different nanofillers in the presence of different curative systems is expected to improve interchain crosslinking between the filler and the elastomer. ZnO is a common curative for many functional elastomers, th…