Materials Literature
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Temperature-induced non-monotonous reversible deformation of water-filled nanoporous silica materials is investigated experimentally using in-situ small-angle x-ray scattering. The influence of freezing and melting in the nanopores on this deformation is treated quantitatively by introducing a simple model based on th…
Heterostructures of Co-doped amorphous carbon (Co-C)/silicon were fabricated by growing Co-C films on n-type Si substrates using pulsed laser deposition. The heterostructures exhibited a positive colossal magnetoresistance (CMR) effect over a temperature range of 55-240 K. The magnetoresistance (MR) for the reverse bi…
The effects of (a) the chemical modification of water hyacinth fiber by poly(vinyl alcohol) (WHF‐ PVA ) and (b) loading on the properties of low‐density polyethylene (LDPE)/(natural rubber (NR))/(water hyacinth fiber (WHF)) composites were studied. Mechanical properties, water absorption behavior, morphology, and ther…
Abstract In this article, we investigate the nanocomposite material formation, particularly the deposition of nanocrystalline diamond and carbon nanowalls (CNWs) on single‐wall carbon nanotubes buckypaper (BP). One part of the buckypaper substrate was nucleated by nanodiamond powder. The growth was carried out in a ho…
Abstract Waste polymer reconditioning was examined by a method of dissolution/reprecipitation on low- and high-density polyethylene (PE) and polypropylene (PP). Toluene and petroleum ether, in different proportions, were used as solvents, and n-hexane was used as a non-solvent. Commercial polymer products used on an e…
In the theory of dislocations, the Burgers vector is usually defined by referring to a crystal structure. Using the notion of affine development of curves on a differential manifold with a connection, we give a differential geometric definition of the Burgers vector directly in the continuum setting, without making us…
Tiny flowers: A conceptually new method for fabricating polymer/Prussian blue (PB) hybrid flowers with ultrathin petals by using a CAICP technique has been developed. The PB hybrid flowers exhibit enhanced thermal stability, emit deep-blue light, and are electrochemically active. Their intriguing microstructure and en…
Abstract Novel X‐type polyurethane 5 containing 4‐(2′,2′‐dicyanovinyl)‐6‐nitroresorcinoxy groups as nonlinear optical (NLO) chromophores, which constitute parts of the polymer backbone, was prepared and characterized. Polyurethane 5 is soluble in common organic solvents such as acetone and N , N ‐dimethylformamide. It…
Boroaluminosilicate glasses containing La 2 O 3 were prepared by the normal quenching method. The glass transition temperatures (T g ) were measured by differential scanning calorimetry (DSC). The structural role of RO was investigated by nuclear magnetic resonance (NMR). Chemical durability was evaluated by weight lo…
Semiconductor quantum dots (QD) have been widely used for fluorescent bioimaging. However their biosafety has attracted increasing attention, since the data about their in vivo behavior in biological systems are still limited. In this paper we have investigated the short- and long-term biodistribution of intact fluore…
The <1 μm fraction of a trans-vacant 1M illite (RM30) was studied by conventional and synchrotron X-ray diffraction (XRD) techniques, combined with thermogravimetric (TG, DTG) methods to investigate the structural transformation of illite at different temperatures and degrees of dehydroxylation (D T ). The oriented…
Abstract This article aims to investigate the effect of soluble and insoluble nitrogen on mechanical properties of stainless steels. Reference steel contains about 14.42%Ni and 0.012%N. Two developed steels have the same base chemical composition of the reference steel except Ni and N contents. One of the developed st…
Members of the edgrewite Ca 9 (SiO 4 ) 4 F 2 -hydroxyledgrewite Ca 9 (SiO 4 ) 4 (OH) 2 series, structural analogues of clinohumite-hydroxylclinohumite series, Mg 9 (SiO 4 ) 4 (F,OH) 2 , were discovered in xenoliths of carbonate-silicate rock altered to skarn within ignimbrites of the Upper Chegem volcanic structure, K…
We report on the charging of individual graphene oxide (GO) sheets with varied degrees of reduction by using electrically biased atomic force microscope (AFM) tips. AFM measurements indicate that the apparent height of reduced GO (rGO) sheets increases sharply after charging, while the charging ability is enhanced whe…
Bioactive constructs to guide cellular mobilization and function have been proposed as an approach for a new generation of biomaterials in functional tissue engineering. Adult mesenchymal stem cells have been widely used as a source for cell based therapeutic strategies, namely tissue engineering. This is a heterogene…
Room-temperature magnetic behavior and tunable bandgap of epitaxial Sn1−xMgxO2 films were investigated. The Mg dopants can enhance the ferromagnetism and the largest saturation magnetization of 7.0 emu/cm3 has been observed in Sn0.94Mg0.06O2 film which has the narrowest bandgap. The ferromagnetism decreases with furth…
Aluminum-lithium alloys are widespread in the aerospace industry. The new 2099 and 2199 alloys provide improved properties, but their microstructure and texture are not well known. This article describes how state-of-the-art field-emission scanning electron microscopy (FE-SEM) can contribute to the characterization of…
We measured energy distribution and yields of electrons emitted from graphene adsorbed on a Ni(111) surface under the impact of 200–1200 eV electrons. The adsorption of graphene results in significant changes of the spectra of emitted electrons but not of the total emission yields. The electronic structure of the grap…
This study concentrates on the energy states introduced into the band gap of polyethylene by chemical impurities and the resulting implications for hole mobility in PE. The thermal activation energies of polyethylene with iodine impurity, PE, and polypropylene can be predicted from the energy of iodine and carbonyl im…
A new family of Co/rare-earth intermetallic cubane aggregates [Co3Ln(hmp)4(OAc)5H2O] (Ln = Dy, Ho, Er, Tm, Yb, Y) have been synthesized by self-assembly. Single-crystal X-ray diffraction analysis revealed that they are remarkably isostructural in showing a common [Co3Ln] core. Magnetic studies showed that the Dy, Er,…