Materials Literature
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Multiwalled carbon nanotubes (MWNTs) have been widely used as nanofillers for polymer reinforcement. However, it has been restricted by the limited available interface area of MWNTs in the polymer matrices. Oxidation unzipping of MWNTs is an effective way to solve this problem. The unzipped multiwalled carbon nanotube…
The resistivity, Hall effect, and transverse magnetoresistance have been measured in low residual resistivity single crystals of LiFeAs. A comparison with angle resolved photoemission spectroscopy and quantum oscillation data implies that four carrier bands unevenly contribute to the transport. However the scattering…
Al:ZnO nanoparticles with different doping levels were synthesized by a microwave-assisted nonaqueous sol–gel route in benzyl alcohol and subsequently processed into transparent conducting films. The crystal structure, crystal size and shape, and doping level of the nanoparticles were analyzed in detail by Rietveld re…
Abstract Blood capillaries are crucial for the biological evaluation of drug diffusion to target tissues, and the penetration of cancer cells or viruses. Since most capillaries have a bilayered structure consisting of a monolayer of endothelial cells (ECs) and surrounding smooth muscle cells (SMCs), the in vitro recon…
The structural properties of the system Y 2 (Ti 1– x Zr x ) 2 O 7 have been investigated using the neutron powder diffraction technique, including a detailed analysis of the “total scattering” using reverse Monte Carlo modeling to probe the short-range ion–ion correlations over sample range 0.0 ≤ x ≤ 1.0. The average…
Symmetric and asymmetric platinum(II) bis(phosphine) bis(aryleneethynylene) complexes that show strong absorption of visible light and long-lived triplet excited states with boron dipyrromethane (Bodipy) chromophore visible light-harvesting antennae attached to the Pt(II) centres were prepared for the first time. The…
Purpose - The purpose of this paper is to review the new trends in plastic additives, with special focus on developments in food packaging materials. Design/methodology/approach - Phenomenological research has brought awareness and increased insight into the role of various plastic additives on the packaging of foods.…
The nature of chemical bonding at graphene–metal interfaces is intriguing from a fundamental perspective and has great relevance for contacts to novel spintronics and high-frequency electronic devices. Here, we use near-edge X-ray absorption fine structure (NEXAFS) spectroscopy in conjunction with Raman spectroscopy a…
The development of nanoelectronics faces severe challenges from Joule heating, leading to high power density and spatial localization of heat, which nucleates thermal hot spots, limits the maximum current density and potentially causes catastrophic materials failure. Weak interfacial coupling with the substrate is a m…
A novel carbon allotrope consisting of parallel zigzag and armchair chains alternatively each other (10 atoms/cell, named pza-C 10 ) was discovered. The calculated band gap of pza-C 10 is 0.31 (0.71) eV with PBE (HSE06), and thus the new member of carbon family is a semiconductor. The pza-C 10 sheet not only is thermo…
Multi-functional rare-earth Yb(3+) and Ln(3+) (Ln = Er, Tm and Ho) ions doped one-dimensional (1-D) upconversion submicrocrystals (NaYF(4) and NaGdF(4)) possessing upconversion luminescence, biocompatibility and magnetic properties have been synthesized by a one-pot hydrothermal method. Rare-earth Yb(3+) and Ln(3+) io…
The reaction of the water soluble phosphine 1,3,5-triaza-7-phosphaadamantane (PTA) with [Au(C≡C-C(5)H(4)N)](n) yields the highly luminescent water soluble [(PTA)Au(4-pyridylethynyl)] complex. A detailed analysis of the compound shows the formation of gel structure giving rise to very long fibers, being the first examp…
Cellulose is the most abundant biopolymer and a major reservoir of fixed carbon on earth. Comprehension of the elusive mechanism of its enzymatic degradation represents a fundamental problem at the interface of biology, biotechnology, and materials science. The interdependence of cellulose disintegration and hydrolysi…
Abstract Comparative in situ X‐ray diffraction (XRD) study of activation Fe, Co, and FeCo catalysts on different supports (Al2O3 and CaCO3) for multi‐walled carbon nanotube (MWNT) growth combined with ex situ high‐resolution transmission electron microscopy (HRTEM) characterization has been performed. The catalyst co…
Biocatalytic action and specific ion effects are both known to have dramatic effects on molecular self-assembly and hydrogelation. In this paper, we demonstrate that these effects are highly cooperative. Biocatalytic hydrogelation of Fmoc peptides in the presence of salts combines kinetic (through enzymatic catalysis)…
The coalescence of viscous drops on a substrate is studied experimentally and theoretically. We consider cases where the drops can have different contact angles, leading to a very asymmetric coalescence process. Side view experiments reveal that the "bridge" connecting the drops evolves with self-similar dynamics, pro…
The requirements for early diagnostics as well as effective treatment of insidious diseases such as cancer constantly increase the pressure on development of efficient and reliable methods for targeted drug/gene delivery as well as imaging of the treatment success/failure. One of the most recent approaches covering bo…
Carbon nanotubes (CNTs) were functionalized with polyethyleneimine (PEI) and made into composites with polyvinyl acetate (PVAc). CNTs were dispersed with different amounts of sodium dodecylbenzenesulfonate (SDBS) prior to the PEI functionalization. The resulting samples exhibit air-stable n-type characteristics with e…
The monomethylaluminum complexes 1 and 2, bearing pyrrolylpyridylamido as dianionic [ − NNN – ] tridentate ligands with general formula [NNN]AlMe, were synthesized and tested as initiators in the ring-opening polymerization (ROP) of ε-caprolactone, l -lactide, and d, l -lactide. In the presence of 1 equiv of alcohol,…
Zinc oxide (ZnO) thin films were deposited on p-silicon (Si) substrate from ammonium zincate bath following a chemical dipping technique called SILAR. Films in the thickness range 0.5-4.5 µm could be prepared by varying the number of dipping for a fixed concentration (0.125 M) of zincate bath and fixed pH (11.00-11.10…