Materials Literature
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Abstract Consecutive synthesis methodologies for the preparation of a series of trimethylsilyl and tert ‐butyl‐substituted ruthenocenes of the type Ru(η 5 ‐C 5 H 3 R 1 R 2 )(η 5 ‐C 5 H 3 R 3 R 4 ) ( 2 , R 1 = SiMe 3 , R 2 = R 3 = R 4 = H; 3 , R 1 = R 3 = SiMe 3 , R 2 = R 4 = H; 4 , R 1 = R 2 = R 3 = SiMe 3 , R 4 = H;…
We report a new method for the synthesis of boron nitride nanostructures (nBN) using laser chemical vapor decomposition (LCVD). Borazine was used as precursor and excited with two simultaneous radiations, the fundamental and second YAG laser harmonics. If only one of the two radiations is employed, no reaction takes p…
The interaction of Cu clusters with ZnO(0001)–Zn terminated crystal faces is studied after reduction at high temperatures by a combination of scanning tunneling microscopy, scanning tunneling spectroscopy, X-ray photoelectron spectroscopy (XPS), and thermal desorption spectroscopy. We find that tiny amounts of Cu prom…
Chitin was synthesized from Nigerian brown shrimps by a chemical process involving demineralization and deproteinisation. Deacetylation of the chitin was conducted to obtain Chitosan. The chitin and chitosan were characterized using FTIR, XRD and SEM. Proximate and elemental analysis were also conducted. The percentag…
Abstract A series of Fe II complexes based on [Fe(tpa)] 2+ building units and [N(CN) 2 ] – bridging ligands with different anions for charge balance has been prepared and characterized. They have a general formula [Fe(tpa){N(CN) 2 }] x · Y · Z, where x = 4 ( 1 4+ ), Y = 4ClO 4 – , and Z = 2H 2 O for 1· (ClO 4 ) 4 (H 2…
Dynamic mechanical and thermal behavior of polyester composites reinforced with enzyme and NaOH-treated jute woven fabrics were studied. Dynamic properties such as storage modulus ( E′), loss modulus ( E″) and damping parameter (tan δ) were determined in a single-cantilever bending mode. The storage modulus of the com…
In this chapter, toluene, p-xylene, acetone and formaldehyde were chosen as the model VOCs because they were regarded as representative indoor VOCs for determining the effectiveness and capacity of gas-phase air filtration equipment for indoor air applications, the photo-catalytic degradation characters of them by TiO…
The impact of stress on changes in magnetisation is one of the most complex issues of magnetism. Magnetic methods make use of the impact of stress on permeability, hysteresis and magnetic Barkhausen noise, which are examined with fields with a high strength and a small frequency. The paper presents an analysis of the…
Nickel nanoparticles were synthesized by two different routes and their reactivity was assessed during methane catalytic decomposition (MCD) conducted in situ in a thermogravimetric analyzer at atmospheric pressure from room temperature to 930 °C. Commercially available nickel nanoparticles were also evaluated for com…
The geometry and energetics of the unreconstructed tin- and oxygen-terminated (100), (010), and (110) surfaces, the tin-terminated (111) surface, and the stoichiometric (001) surface of rutile-SnO${}_{2}$ are investigated. Total energies and relaxed atomic geometries are calculated within density functional theory usi…
Aluminum-based composites containing multi-walled carbon nanotubes are produced by a powder metallurgy route involving a ball-milling technique. Effects of processing parameters on the dispersion of multi-walled carbon nanotubes and resulting properties are investigated. Multi-walled carbon nanotubes, initially locate…
Batches of multi-walled carbon nanotubes having an average length of 2091 nm were aggressively tip-ultrasonicated to produce shortened carbon nanotubes having average lengths of 1689 nm, 1332 nm, 992 nm and 503 nm. Raman spectroscopic analysis confirmed that the shortened carbon nanotubes retained their crystallinity…
Licht an: Die Photokontrolle von J-artigen Excitonen-Wechselwirkungen gelingt mithilfe von Chromophoren (siehe Bild). Wasserstoffverbrückte Merocyanin-Farbstoffe lassen sich durch photoinduzierten Ringschluss/Ringöffnung von Diarylethen-Rezeptoren reversibel schalten. Die Zugabe von Bismelamin-Rezeptoren, die eine H-A…
12 C isotopically enriched polycrystalline diamond free-standing plates were synthesized by microwave plasma-assisted chemical vapor deposition. Diamond plates 30 mm in diameter and 100–600 µm in thickness were successfully obtained at a typical growth rate of 3–5 µm/h. The 12 C isotopic enrichment was 99.997%, wherea…
A physically meaningful analytical (mathematical) model is developed for the prediction of the interfacial shearing thermal stress in an assembly comprised of two identical components, which are subjected to different temperatures. The bonding system is comprised of a plurality of identical columnlike supports located…
As a part of continuous efforts to systematically understand the morphological development in water‐assisted injection molding, high density polyethylene with different molecular weights was molded in this study. Unexpectedly, it was found that shish kebab with high lamellar and molecular orientations was formed in th…
In this paper, an NLO polymer P2, consisting of “star-type” chromophore, was first prepared through the Suzuki coupling reaction and the Sonogashira coupling reaction. For comparison, its “H-shape” analogue P1, only consisting of an “H-type” chromophore, was synthesized. To further enhance the NLO coefficient and stab…
Fluorescent emitters in diamond are considered to be a valuable resource for fields such as quantum communication, quantum photonics, and biological imaging. In this paper, we report a wide range of narrow bandwidth ( ~ 1.5 nm) spectral emission lines arising from different color centers at room temperature. The defec…
Biocompatible superparamagnetic polyelectrolyte hybrid hollow microspheres ((CS/Fe(3)O(4)-CA)(3)-CS-NH-CH(2)-PEG) were successfully prepared by PEGylation of multilayered polyelectrolyte hybrid shell encapsulated polystyrene sulfonate (PSS) microsphere templates fabricated by the layer-by-layer self-assembly of chitos…
A graphene field-effect-transistor (GFET) model calibrated with extracted device parameters and a commercial 65 nm silicon MOSFET model are compared with respect to their radio frequency behavior. GFETs slightly lag behind CMOS in terms of speed despite their higher mobility. This is counterintuitive, but can be expla…