The fiber morphology was studied by SEM pattern, EDX, and X-ray diffractometer. The results showed that the wool yarns BIBW2992 mw dyed with acid dye along with 25 ppm of silver nanoparticles exhibited a very good antimicrobial effect even after 10 laundering cycles on S. aureus while the rubbing fastness remained unchanged, and the color fastness and tenacity were even improved. (C) 2011 Wiley Periodicals, Inc.
J Appl Polym Sci 122: 1405-1411, 2011″
“Thin film alternating gradient field magnetometers (AGFM) have potential for measuring magnetic moments of minerals in extraterrestrial soil samples. AGFM sensors offer increased spatial resolution required to detect magnetic nanoparticles for biosensing applications. We have fabricated a patterned thin film with the properties necessary for use in a small AGFM system. Hexagonal-close-packed CoCrPt thin films of 20 and 500 nm were sputtered (nominal composition of Co(66)Cr(15)Pt(19)), showing a high magnetic moment and large out-of-plane
anisotropy. The films showed a Delta theta(50) of better than 3 degrees for the (002) CoCrPt peak for all films, which improves with thickness. The texture is partly due to the NiW and Ru underlayers. The films showed an out-of-plane easy axis, indicating a strong uniaxial anisotropy that exceeds the shape demagnetization energy. This is due to the addition of Cr, which decreases the magnetic moment of the films; magnetoelastic coupling and film stresses may also aid in achieving a perpendicular anisotropy.
The first-order uniaxial anisotropy constants were calculated as a function of Selleck MAPK inhibitor temperature, ranging from 3.7 x 10(6) ergs/cm(3) at room temperature to 6.8 x 10(5) ergs/cm(3) at 500 degrees C, and the T dependence agrees with Akulov’s theory for uniaxial materials. The thickest film was etched with a checkerboard pattern to decrease the demagnetization effects, which are seen more influentially in the thicker films. selleck chemicals This opened up the hysteresis loop, and decreased the amount of field necessary to overcome the thin film geometry. (C) 2011 American Institute of Physics. [doi:10.1063/1.3536672]“
“Hydroxyapatite/ethylene-vinyl acetate (HA/EVA) composites were prepared by injection molding and characterized by X-ray diffraction (XRD) and attenuated total multiple reflection infrared (ATR-IR) spectroscopy. The nonisothermal crystallization behavior of HA/EVA composites at different cooling rates and with different HA content were examined by differential scanning calorimetry (DSC). The results exhibit the occurrence of interaction between HA and EVA, and the HA particles in EVA matrix act as effective nucleation agent. The addition of HA influences the mechanism of nucleation and growth of EVA crystallites. HA particles, as nucleus, are efficient to promote EVA crystallization at early stage but prevent EVA crystal growth in the late stage. The EVA crystallization in the composite is mainly through heterogeneous nucleation.