Materials Literature
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Biomimetic superhydrophobic surfaces successfully fabricated on high-density polyethylene surfaces by simple heat- and pressure-driven imprinting methods using patterned anodic aluminum oxides as replication templates are reported. On measuring the water contact angle (see figure), it is clearly observed that the nano…
Gold threads modified with superhydrophobic or normal hydrophobic coatings are used as a model system in the study of the contribution of the superhydrophobic coating of a water strider to its floating and movement on the water surface. After depositing Pt aggregates on one of its ends (see figure), the gold threads a…
Abstract Films of high Young's modulus and low density are of interest for application as loudspeaker membranes. In the present study nanocomposite films were prepared from microfibrillated cellulose (MFC) and from MFC in combination with melamine formaldehyde (MF). The prepared materials were studied with respect to…
Abstract Robust ultrathin multilayer films of silk fibroin were fabricated by spin coating and spin‐assisted layer‐by‐layer assembly and their mechanical properties were studied both in tensile and compression modes for the first time. The ultrathin films were characterized by a high elastic modulus of 6–8 GPa (after…
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…