Materials Literature
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Abstract Polystyrene (PS)/multi‐wall carbon nanotube (MWCNT) nanocomposites were prepared by melt mixing and by coagulation of PS/MWCNT sonicated dispersion. Before mixing and coagulation particles of MWCNT were covered with PS nanospheres by microemulsion polymerization to increase their dispersibility and compatibil…
Abstract BACKGROUND: Poly(ε‐caprolactone) (PCL) has attracted great attention due to its wide applications for pharmaceutical controlled released systems and implanted polymer devices. In this study, silk fibroin fiber (SF) obtained from degumming treatment of silk was used to prepare novel reinforced PCL biocomposite…
Abstract Polyaniline (PANI) nanofibers were chemically prepared through ultrasonic irradiated polymerization with varying ultrasonic power, frequency, and reaction temperature. It was found that PANI nanofibers with smoother surfaces and uniform diameters can be achieved by increasing the ultrasonic power or the react…
Abstract ζ‐potential measurements on LUVs allow to evidence the influence of pH, ionic salt concentration, and polyelectrolyte charge on the interaction between polyelectrolyte (chitosan and hyaluronan) and zwitterionic lipid membrane. First, chitosan adsorption is studied: adsorption is independent on the chitosan mo…
We report the influence of the polymer network density formed in short-pitch ferroelectric liquid crystal (FLC) on the soft and the Goldstone dielectric relaxation modes. The experimental results of the pure FLC and the FLC stabilized by a polymer network with various densities are presented and compared. These result…
The sidewalls of metallic single-walled carbon nanotubes (SWNTs) are selectively attacked by triethylsilane through a hydrosilylation reaction. Network-type SWNT field-effect transistor devices (see picture) show increased on/off current ratios after hydrosilylation.
Abstract Ordnung im Ölfilm : Mithilfe von reizempfindlichen Emulsionen wurden temperatur‐ und pH‐responsive Mikrogele entwickelt. Die Emulsionsstabilität an den Öl‐Wasser‐Grenzflächen wird nicht durch die Packungsdichte der Partikel bestimmt. Durch die Grenzfläche ausgelöste Strukturänderungen führen zur Verknüpfung d…
Abstract It is shown experimentally using colour high‐speed framing photography, carried out at 1 million frames per second that in a Prince Rupert's drop made of soda‐lime glass, a self‐sustained destruction/fracture wave can travel at a steady and stable speed of (1700 ± 100) m s –1 . It is also shown that this limi…
Distribution of magnetic ions in a semiconducting host is critical for the functionality of diluted magnetic semiconductors. By investigating the temperature- and field-dependent magnetization of single-phase polycrystalline ZnO:Co oxides, the substitution of Co at the Zn site is found not to occur randomly but Co ion…
Abstract High‐density polyethylene (HDPE)/hydrotalcite nanocomposites were prepared and characterized with a partially neutralized sodium ionomer of poly(ethylene‐ co ‐methacrylic acid) (EMAA) as a compatibilizer. Moreover, nanocomposites based on this ionomer were characterized as patterns to analyze the interactions…
Abstract The present study reports the synthesis and characterization of waterborne interpenetrating network (IPN) of epoxy‐acrylic‐oleic acid (EpAcO) with butylated melamine formaldehyde (BMF). The effect of BMF on the formation of IPN was investigated in terms of physicochemical, spectral, morphological, and thermal…
The geometry, stability, and electronic properties of B@Co12@Bn and Co13@Bn clusters with a wide range n=55 up to 92 are studied by ab initio calculations. We find that B@Co12@B80 and Co13@B80 with closed B80 shell are two stable magic clusters with nearly perfect icosahedral symmetry, and B@Co12@B80 is more stable th…
Abstract Most polyurethane elastomers in the market place are based on aromatic isocyanates. This is partially due to the higher cost of aliphatic isocyanates compared with aromatic isocyanates which are commonly used by the industry. However, more importantly, it has been the performance deficiency of polyurethane el…
Blanket‐like assembled ZnO nanowhiskers were fabricated using a freestanding ZnO nanoparticle layer by an aqueous solution deposition. X‐ray diffraction and field emission scanning electron microscopy clarified the crystalline phase, orientation, morphology, and microstructure. Thermal treatment of the zinc acetate di…
AIM: Toxicity of nanoparticles developed for biomedical applications is extensively debated as no uniform guidelines are available for studying nanomaterial safety, resulting in conflicting data obtained from different cell types. This study demonstrates the varied toxicity of a selected type of nanoparticle, cadmium…
We have performed a detailed study of the order and dynamics of the commercially available BL038 liquid crystal (LC) inside nanosized (50-300 nm) droplets of a reflection-mode holographic-polymer dispersed liquid crystal (H-PDLC) device where LC nanodroplet layers and polymer layers are alternately arranged, forming a…
Nickel‐doped forsterite (Ni 2+ :Mg 2 SiO 4 ) nanocrystals have been synthesized by a facile molten‐salt approach in the presence of NaCl and a surfactant (NP‐7.5). The products were characterized by X‐ray diffraction, transmission electron microscopy (TEM), high‐resolution TEM, selected area electron diffraction (SAED…
Abstract The preparation of BaCeO 3 doped by neodymium and lutetium oxides (BaCe 0.8 Nd 0.2 O 2.9 , BaCe 0.8 Lu 0.2 O 2.9 ) has been performed by solid‐state reactions of BaCO 3 and CeO 2 with Nd 2 O 3 and Lu 2 O 3 , respectively. The compound BaCe 0.8 Lu 0.2 O 2.9 has been synthesized for the first time. The X‐ray me…
The effect of dielectric friction on the rate of charge separation in type II ZnSe/CdS semiconductor nanorods has been investigated using picosecond transient absorption spectroscopy. The spatial separation of an excited electron-hole pair was estimated from the redshift in band edge absorption corresponding to the de…
New homo- and heterobimetallic tetranuclear complexes of formula [Cu(4)(mpba)(Me(4)en)(4)(H(2)O)(4)](ClO(4))(4).3H(2)O (1), [Cu(4)(mpba)(Me(4)en)(4)(H(2)O)(4)](PF(6))(4).2H(2)O (2), [Cu(4)(ppba)(Me(4)en)(4)(H(2)O)(4)](ClO(4))(4).2H(2)O (3), [Cu(4)(mpba)(dipn)(4)](ClO(4))(4).3H(2)O (4), [Cu(4)(ppba)(dipn)(4)](ClO(4))(4…