Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The polymer-dispersed liquid crystal (PDLC) was used as a dielectric layer of electroluminescent (EL) device to provide multi-function of electroluminescence and electro-optic shutter. A 50 μm-thick PDLC layer was formed between a transparent electrode and a ZnS:Cu phosphor layer. The electro-optic properties of the E…
An image analysis technique in conjunction with polarising optical microscopy (POM) is proposed for assessment of the thermo-optical properties of homogeneously aligned chiral ester liquid crystals of the type ((S)-(-)-2-methylbutyl 4′-(4″-n-alkanoyloxybenzoyloxy) biphenyl-4-carboxylates, where n = 16 or 18. Chiral es…
Hohle Ceroxidfasern mit auf ihren Innenoberflächen eingebetteten Pt-Nanopartikeln (Pt-NPs) bilden sich durch sequenzielles Abscheiden von Pt-NPs und CeO2-Hüllen auf elektrogesponnenen Polystyrolfasern mit nachfolgender Kalzinierung an Luft bei 400 °C. Trotz relativ geringer Pt-Beladung ist die Turnover-Frequenz der CO…
Ein pH-Indikator: Im Nahinfraroten (NIR) emittierende Lanthanoid-funktionalisierte Gold-Nanopartikel wurden durch Selbstorganisation zwischen einem YbIII-Cyclen-Komplex und Xylenolorange an der Goldoberfläche erhalten (siehe Bild). Optisches Anregen des Xylenolorange mit sichtbarem Licht (bis 600 nm) sensibilisiert di…
Five aluminum-based amine-bis(phenolate) complexes, three of them novel, with variation of the pendant donor arm were synthesized in excellent yields, and characterized by NMR spectroscopy and X-ray crystallogra-phy. The quantitative conversion of the aluminum alkyl species to the corresponding benzyl alkoxide was ach…
Water-based polyurethane dispersions (PUD) are a rapidly growing segment of polyurethane (PU) coatings industry due to environmental legislations such as the clean air act and also due to technological advances that made them an effective substitute for the solvent-based analogs. Water-based or waterborne PUD have gai…
Water-based corrosion inhibitors, in addition to providing improved performance, offer several other advantages over oil-based corrosion inhibitors, such as better water-partitioning characteristics, high flash points, and higher reportable quantities if a spill occurs. We have found in several instances that new wate…
We describe studies of nanoparticle synthesis using oligonucleotides as capping ligands. The oligonucleotides nucleate, grow, and stabilize near-infrared fluorescent, approximately uniform PbS nanocrystals in an aqueous environment. The properties of the resulting particles strongly depend upon the sequences as well a…
A photobleaching method was used to measure the reorientation of dilute probes in liquid o-terphenyl near a crystal growth front. Near the glass-transition temperature Tg, mobility in the supercooled liquid was enhanced within ∼10 μm of the crystal growth front, by as much as a factor of 4. This enhanced mobility appe…
Abstract Li-doped ZnO after different thermal treatments was characterized by depth-resolved cathodoluminescence spectroscopy (DRCLS), secondary ion mass spectrometry, surface photovoltage spectroscopy (SPS), coupled with other surface science techniques. It is found that the Li configuration and electrical properties…
Secondary electron emission is one of the most fundamental problems in spacecraft charging. An accurate prediction of secondary electron yield at low-energy electron impingement has long been a challenging problem due to both the complexity of the process and the difficulty in carrying out accurate measurements in a v…
The in situ growth of Ni-containing layered double hydroxide (LDH) microcrystallites on microspherical γ-alumina support was carried out through the surface activation of support followed by a homogeneous coprecipitation process, and carbon nanomaterials were synthesized directly over as-grown supported LDH samples vi…
A series of coumarin derivatives, 7-alkoxycoumarin-3-carbonyl hydrazine (nCCH), which possessed a hydrazine moiety at the end of the molecule was prepared and was characterised by infrared and 1H-nuclear magnetic resonance spectra, electrospray ionisation-mass spectrometry and elemental analysis. All the compounds exh…
Silicon is the second most common element on the Earth's crust and its oxide (SiO(2)) the most abundant mineral. Silica and silicates are widely used in medicine and industry as well as in micro- and nano-optics and electronics. However, the fabrication of glass fibres and components requires high temperature and non-…
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…