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。
Abstract The frequency upconversion emissions of NaYF 4 nanocrystals embedded in transparent glass ceramics codoped with Yb 3+ /Er 3+ , prepared by melt quenching and subsequent heating, were investigated. It was found that, compared with that of the sample singly doped with 0.5Er 3+ , the intensities of the green and…
Highly fluorescent organic nanoparticles with size of about 300 nm were prepared by nanosecond laser ablation of micrometer-sized powder of dendronized perylenediimide dispersed in water. The nanoparticle colloidal solution provided a fluorescence quantum yield of 0.58. The absorption and emission spectral studies dem…
In a bioinspired methodology, positively charged polypeptides and polyamines directly catalyse ZnO mineralization under "green" conditions of room temperature and neutral pH. The polyamines not only act as mineralizing agents for the formation of ZnO nanoparticles, but also self-assemble the nanoparticles to form spin…
Reverse Monte Carlo (RMC) refinements using a combined real-space fit of the neutron/X-ray total scattering pair-distribution function (PDF) and the extended X-ray absorption fine structure (EXAFS) were developed and implemented as an extension to the public domain computer software RMCProfile . The effectiveness of c…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
We have produced hybrid liposomes (HL) which can be prepared by ultrasonicating a mixture of dimyristoylphosphatidylcholine (DMPC) and polyoxyethylene(23)dodecyl ether in a buffer solution. The fifty-percent inhibitory concentration (IC50) of HL on the growth of human B lymphoma (RAJI) cells in vitro was determined. T…
NO 2 adsorption on activated carbons at ambient temperature was studied. The adsorbed species after various adsorption times were examined by analyzing the evolution of NO, NO 2, CO, CO 2, and O 2 during thermal desorption. Emission of NO but not NO 2 was observed during the early stage of NO 2 adsorption. From the ni…
We present a robust method for synthesis of aligned, single-walled carbon nanotube (CNT) "flying carpets" from nanostructured alumina flakes. Roll-to-roll e-beam deposition is utilized to produce the flakes, and hot filament chemical vapor deposition is utilized to grow dense, aligned carbon nanotubes from the flakes…
The rapid advancements in digital technologies have prompted organizations to embrace digital transformations (DTs) in order to enhance efficiency, gain a competitive advantage, and achieve long-term sustainability objectives.However, the successful adoption of innovative digital technologies necessitates the careful…
We have performed high-resolution angle-resolved photoemission spectroscopy on Tl-doped PbTe. We observed a distinct energy shift of the valence band and core levels upon Tl doping, together with the evolution of a small hole pocket around the X[over] point in the Brillouin zone, while no clear evidence for the locali…
A novel pentadecatungstate, [H 6Ce 2(H 2O)Cl(W 5O 18) 3] (7-) ( 1), constructed by a dinuclear cerium unit and 15-member ring WO 6 units was prepared and characterized by single-crystal X-ray diffraction. Polyanion 1 exhibits blue photoluminescence with an emission maximum at 488 nm, which is characteristic of cerium(…
Modifications of the quantum dot (QD) surface are routinely performed via covalent biomolecule attachment, and poly(ethylene glycol) (PEG) derivatization has previously been shown to limit nonspecific cellular interactions of QD probes. Attempts to functionalize ampiphilic QDs (AMP-QDs) with custom PEG derivatives hav…
A small-angle light scattering (SALS) instrument with a high resolution at low angles and a high signal-to-noise ratio has been developed. Both a wide dynamic range and a wide scattering vector range are achieved using a two-dimensional array of complementary metal oxide semiconductor image sensors. These instrument c…
We describe the new nanostructured Pt/Ge/Se materials prepared from the molecular units [Ge2Se6](4-) and [GeSe4](4-) and linking Pt(2+) ions in the presence of surfactant micelles. X-ray diffraction coupled with transmission electron microscopy images reveals hexagonal pore symmetry. The solvent dependence and solutio…
Nanostructured ZnO thin films have been grown on quartz substrates by metal organic chemical vapor deposition. Zn(tta) 2 •tmeda (H-tta = 2-thenoyltrifluoroacetone, tmeda = N, N, N ′, N ′-tetramethylethylenediamine) has been used as Zn precursor. The impact of deposition temperature, in the range 400−750 °C, on film na…
Gold oxide cluster cations, containing one to four gold atoms and between one and five oxygen atoms, were investigated employing guided-ion-beam mass spectrometry to gain insight into their reactivity with CO. Clusters with one atomically bound oxygen atom (AuO +, Au 2 O +, and Au 3 O + ) were found to be reactive and…
The large-size domain and continuous para-sexiphenyl (p-6P) ultrathin film was fabricated successfully on silicon dioxide (SiO2) substrate and investigated by atomic force microscopy and selected area electron diffraction. At the optimal substrate temperature of 180 degrees C, the first-layer film exhibits the mode of…
Due to their tunable optical properties and their well-defined nanometric size, core/shell nanocrystals (quantum dots, QDs) are extensively used for the design of biomarkers as well as for the preparation of nanostructured hybrid materials. It is thus of great interest to understand their interaction with soft lipidic…
Unsymmetrical 1-(arylimino)-3-(2-hetarylimino)isoindolines have been prepared from 1,3-diiminoisoindoline, an arylamine (aniline, 2-methylaniline, 2-iodoaniline), and a heteroaromatic amine (2-amino-6-methylpyridine, 2-amino-4-methylthiazole) in a stepwise manner by two consecutive condensations. The metalation reacti…
The Coats and Redfern method for the determination of the activation energy has been extensively used in the kinetic analysis of thermal decomposition of coal and biomass. The relative errors involved in the apparent activation energy obtained from the Coats and Redfern method have been calculated by some researchers.…