Materials Literature
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We report a differential scanning calorimetry investigation of the adsorption of normal alkanes on the surface of hexagonal boron nitride. The alkanes investigated (pentane–hexadecane) all show small transitions above the bulk melting point. On the basis of similar results on graphite, we assign these transitions as t…
Recently, the ability of polymeric collagen-like peptides to regulate cell behavior has generated great interest. A triple-helical peptide known as collagen-related peptide (CRP) contains the sequence (Gly-Pro-Hyp)(10). With Gly-Pro-Cys triplets appended to both of its termini, designated CRP(cys), chemical cross-link…
In this paper, we propose a charge-trap flash memory device using a ferroelectric material, Sr0.7Bi2.3Nb2O9 (SBN), with spontaneous polarization as a blocking layer. This device consists of metal/SBN/nitride/oxide/silicon and has an advantage in the carrier injection into the nitride from the silicon due to polarizati…
Reaction of the n = 3 Ruddlesden-Popper oxychloride Sr(4)Mn(3)O(7.5)Cl(2) with calcium hydride yields the topotactically reduced phase Sr(4)Mn(3)O(6.5)Cl(2). The deintercalation of oxide ions from the central MnO(1.5) layer of the starting phase is accompanied by a rearrangement of the anion lattice, resulting in a la…
Zone-coated diesel oxidation catalysts (DOCs) can be used to obtain overall improved performance in oxidation reaction extents. However, why this occurs and under what conditions an impact is expected are unknown. In order to demonstrate why these catalysts work better than their standard counterparts and how signific…
To improve electrical properties a high temperature annealing treatment was applied to several transparent conductive oxides (TCO), namely tin doped indium oxide (ITO), Ga- or Al- doped ZnO (ZnO:Al/Ga), ion beam assisted deposited (IBAD) ZnO:Ga and Ga doped zinc magnesium oxide (ZnMgO:Ga). All these films were grown b…
The photoluminescence (PL) spectra acquired from CdS nanocrystals encapsulated with oleic acid synthesized by a two-phase approach exhibit two fine features, including a narrow peak arising from near-band edge emission and a broader one composed of two subpeaks at slightly lower energy. Solvent effects suggest that th…
Intercalated/exfoliated nanocomposites of thermoplastic polyolefin (TPO) blended nanoclay (Cloisite 20 A and Cloisite 30B) were fabricated using melt extrusion process. Polypropylene grafted maleic anhydride (PP-g-MA) was used as a compatibiliser to improve the dispersibility of clay. TPO/nanoclay composites were prep…
This research compared the low velocity impact damage resistance of 24 ply quasiisotropic base and polymer nanofabric interleaved composite laminates. The impacted laminates were compression tested to assess the damage tolerance. The polymeric nanofibers were fabricated by the electrospinning of Nylon-66 solution, and…
Abstract The parasitic absorption effect of metal nanoparticles in the dye‐sensitized solar cells (DSSC) was investigated using the finite difference time domain technique. It was shown that the conversion efficiency can be improved up to 15–20% in the DSSC device with an optimized metal nanoparticle array of 210 nm i…
Local structure around Fe ions on Pb(Fe1/2Nb1/2)O3 ceramics was probed by x-ray absorption spectroscopy in order to settle the controversies about its structure. It is observed that the shell structure around Fe atoms exhibits a monoclinic local symmetry at 130 and 230 K, tetragonal local symmetry at room temperature,…
Abstract In this research work, three different types of nano-composites based on EPDM/NBR blend (70/30 wt.%) have been prepared: one type including Cloisite 20A in EPDM phase, the other one containing Cloisite 30B in NBR phase and the third type consisting of Cloisite 20A in EPDM and Cloisite 30B in NBR phases simult…
Arrays of conical-shaped nanodiamond structures are formed on silicon substrate by a single-step CVD process from CH4/H-2 mixtures. The formation of these nanocones has been found to depend on interplay between growing and etching during the CVD process carried out in a dual-mode MW/RF plasma reactor. Morphology and s…
Colloidal stability and coagulation kinetics of orthorhombic and monoclinic sulphur nanoparticles (SNPs) were determined in terms of their size distribution along a gradient of temperature, dilution and time-drive. Dynamic light scattering (DLS) was used to determine the size and shape of SNPs in the colloidal suspens…
Abstract This paper reports on the synthesis of polyester‐grafted starch (starch‐ g ‐PCL) by in situ ring‐opening polymerization (ROP) of ε‐caprolactone (ε‐CL) catalyzed by a metal free organic catalyst (imidazole). This reaction has been carried out in bulk, without solvent. The structure of starch‐ g ‐PCL was charac…
Wavelength-dependent surface-enhanced Raman spectra of methylene blue adsorbed on rough submicrometer silver particles were measured. Results revealed a high enhancement factor (105 ∼ 107), especially in the long-wavelength region. Investigation on the far- and near-field optical properties of the particles showed a r…
We investigate the properties of a bi-molecular film of liquid crystal close to a magnetic nanoparticle terminated with a variety of functionalization compounds using atomic force microscopy. Studies in bulk liquid crystals have shown that the functionalization compound influences how the liquid crystal reorients. The…
This paper presents results showing the improvement of water repellency on an aluminium substrate after immersion in boiling water followed by plasma polymerization of Hexamethyldisiloxane (HMDSO) via a Grey-based Taguchi method. Immersion in boiling water was used to create a rough nanostructured surface on the alumi…
Using the full-potential linearised augmented-plane wave (FP-LAPW) method based on density functional theory (DFT), we have investigated the electronic structures, the magnetic behavior, and the ferroelectric origin of multiferroic Bi2NiMnO6. The calculated ferromagnetic Curie temperature of Bi2NiMnO6 is very sensitiv…
Abstract Surface modification of biomaterials has been adopted over the years in order to improve their biocompatibility. In this study, heparin, hyaluronic acid and chondroitin sulfate were used to modify the surface of poly( L ‐lactic acid) (PLLA) films by an entrapment method to promote its biocompatibility and to…