Materials Literature
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A novel continuous flow (CF) electroless (EL) plating method deposits gold (Au) films which exhibit increased continuity and uniformity relative to batch immersion as measured by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Transmission UV−vis (T-UV) spectra exhibit lower peak heights (PH) and…
Abstract The tri‐nickel Dawson sandwich complex [NaNi 3 (H 2 O) 2 (P 2 W 15 O 56 ) 2 ] 17– has been obtained from [P 2 W 15 O 56 ] 12– and Ni 2+ . The X‐ray crystal structure analysis is reported. This complex presents an unprecedented structure with the three transition metal ions in two external and one internal pos…
A three‐dimensional quantitative Raman analysis of ferroelectric domain orientation is presented for single‐crystalline barium titanate (BaTiO 3 ; BT). The analysis has been developed according to basic principles of polarized/confocal Raman spectroscopy and is aimed at visualizing in three dimensions the geometrical…
Renewable raw materials and recyclable thermoplastic polymers provide attractive eco-friendly quality as well as environmental sustainability to the resulting natural fiber reinforced composites. We studied the possibility of using the recycled polypropylene (PP) for production of composites based on kenaf fibers (KF)…
Abstract The graft copolymerization reaction of acrylamide onto guar gum with a vanadium(V)/mandelic acid redox pair was carried out in an N 2 atmosphere. The optimum concentrations of vanadium(V), mandelic acid, hydrogen ions, acrylamide, and guar gum for the maximum percentage of grafting were 6.0 × 10 −3 , 2.0 × 10…
The studies on high-level excited states of an ion and electronic transition between different levels, either with theoretical or experimental methods, will help reveal the mechanism of luminescence, which is also a prerequisite for development of novel high efficiency phosphors. In this paper, Bi 3+ , Eu 3+ and/or Tb…
Abstract A MSM (metal‐semiconductor‐metal) ultraviolet (UV) photo‐detector was fabricated on a high‐quality diamond film deposited by microwave chemical vapor deposition on a Si substrate. Charge‐based deep level transient spectroscopy (Q‐DLTS) was used for obtaining the information on activation energy ( E a ), captu…
Carbon nanotubes are fabricated using chemical vapor deposition at predetermined locations by patterning catalyst directly on a substrate with nanometer-scale precision using dip-pen nanolithography with multipen cantilevers (see image). The development of new molecular inks for the deposition of the precursor catalys…
The 5,10-porphodimethene-type P,S,N 2 -hybrid calixphyrins bearing p -methoxyphenyl or p -(trifluoromethyl)phenyl groups at the sp 2 -hybridized meso carbons and their palladium(II) and rhodium(I) complexes were prepared and characterized. The electronic effects of the meso-aryl substituents on the redox properties of…
A series of ferrite spinels [AFe 2 O 4, where A = Fe(II), Co(II), Ni(II), or Zn(II)] synthesized by coprecipitation were reduced in hydrogen and subsequently studied in the decomposition of carbon dioxide at 500 °C by a combination of in situ XANES, XRD, and mass spectrometry methods. The reducibilities of the ferrite…
Abstract Attempts have been made to use different amount of ground tire rubber (GTR) powder as a partial substitute for natural rubber (NR) in thermoplastic elastomer based on linear low‐density polyethylene (LLDPE, 60 wt%) and NR (40wt%). Maleic anhydride (MA) and dicumyl peroxide (DCP) were used, during melt mixing…
Ab initio Hartree-Fock (HF) and density functional theory (DFT) calculations are being performed to investigate the geometric, vibrational, and electronic properties of the polyaniline leucoemeraldine base (PANI-LB). Vibrational spectra of PANI-LB have been analyzed using the DFT oligomer approach, and complete assign…
Equilibrium, supramolecular assembly in melt blends of two species of telechelic polymers with reversible bonding sites at both ends is theoretically investigated. The bonding between polymers, whether between like or dislike chains, is controlled by affinities of chain bonding set by specified bond energies. Low affi…
The C-H breaking of methane on the clean and the oxygen precovered palladium single crystal surfaces with the simplest orientations, namely, the dense (111), (100), the more open (110), and the stepped (111) surfaces, the corresponding O/Pd surfaces with different coverage of oxygen, as well as the palladium oxide PdO…
Addition of charged surfactant to mixtures of air, water and hydrophobic silica nanoparticles under high shear induces transitional phase inversion from a water-in-air powder to an air-in-water foam. Optical and electron microscopy reveal the non-spherical shape of both drops and bubbles, respectively, in these materi…
The creep behavior of glass or glass–ceramic sealant materials used in solid oxide fuel cells (SOFCs) becomes relevant under SOFC operating temperatures. In this paper, the creep of glass–ceramic sealants was experimentally examined, and a standard linear solid model was applied to capture the creep behavior of glass–…
By means of time-of-flight neutron scattering, we have characterized the dynamic structure factor and the hydrogen motions of polyethylene above its melting point. As signatures of simple-liquid dynamics, we observe that (i) in the explored dynamic window, the intermediate scattering functions display a single-step de…
Localization and magnetism of Fe replacing either Mn or Ni in the Ni 2 Mn 1.44 Sn 0.56 -type Heusler alloy have been systematically investigated using magnetization, scanning electron microscopy and Mössbauer spectroscopy. It has been shown that the addition of Fe either in Mn or in Ni sites reduces the fraction of th…
In situ high-temperature neutron powder diffraction, dilatometry, X-ray photoelectron spectroscopy (XPS), and thermal gravimetrical analysis (TGA) were applied to study crystal structure and phase transformations in A-site deficient nominal composition La 0.95 Ni 0.6 Fe 0.4 O 3−δ with temperature and oxygen partial pr…
This study reports on the characterization of a carbon nanotube fibre using synchrotron radiation microbeam small- and wide-angle X-ray scattering in combination with microfluorescence. The fibre, spun directly from a chemical vapour deposition reaction zone, is imaged in terms of microstructural heterogeneities. The…