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。
This paper was to study the clothes dryer using waste heat from a split type air conditioner with a capacity of 12,648 btu/h. The drying chamber had a minimum cross section area with the size of 0.5 x 1.0 m2. The chamber was constructed by sailcloth and was inside folded with aluminium foil. Then, it was connected to…
Abstract We study the change in the structural morphology and optical properties of aqueous solution grown ZnO microrods on glass substrates with the change in the concentration of hexamethylene tetramine (HMT). The field emission scanning electron microscope images of the microrods grown for equimolar (1:1) ratio of…
Optical absorption and photoluminescence (PL) measurements have been made on the quantum dots (QDs) of CdS grown in a borosilicate glass matrix using a two-step annealing technique. The absorption measurements, made in the energy range of 1.3–3.2 eV, indicate the presence of nonradiative trap centers located in the fo…
Transparent semiconductor thin films of Zn1−x Mg x O (0 ≤ x ≤ 0.36) were prepared using a sol–gel process; the crystallinity levels, microstructures, and optical properties affected by Mg content were studied. The experimental results showed that addition of Mg species in ZnO films markedly decreased the surface rough…
By means of in situ small/wide-angle X-ray scattering (SAXS/WAXS) and differential scanning calorimetry (DSC), we examined evolutions of lamellar crystal thickness for α and β crystals, respectively, in bulk-crystallized syndiotactic polystyrene (sPS) during the partial melting−reorganization process upon progressive…
We report experiments highlighting the mechanistic role of mobile pentacene precursors in the formation of a network C(60)-pentacene co-crystalline structure on Ag(111). This co-crystalline arrangement was first observed by low temperature scanning tunneling microscopy (STM) by Zhang et al. (Zhang, H. L.; Chen, W.; Hu…
Abstract Peroxide cured metallocene catalyzed polyethylene (mPE) has been prepared to form an elastomer. mPEs with two different levels of comonomer contents have been cured with various amounts of dicumyl peroxide. “Threshold” fracture energy is roughly proportional to the reciprocal square root of Young's modulus. T…
A modified polymerizable complex (PC) method for the preparation of the relaxor ferroelectric 0.65Pb(Mg 1/3 Nb 2/3 )O 3 –0.35PbTiO 3 (PMN–PT) ceramics has been developed using a novel water‐soluble Nb precursor. The effects of Pb content and sintering temperature on the structure, morphology, composition, and electric…
Abstract— Near‐infrared‐to‐visible upconversion luminescence was observed in Sm 3+ ‐doped ZnO‐B 2 O 3 ‐SiO 2 glass under femtosecond laser irradiation. The luminescence spectra show that the upconversion luminescence originates from 4 G 5/2 to 6 H j /2 ( j = 5, 7, 9) transition of Sm 3+ . The dependence of the fluores…
Thermobalances are used for equilibrium vapor pressure measurements based on both effusion and transpiration methods. In the case of the transpiration method, however, despite the numerous advantages a thermogravimetric apparatus can offer, it is not as widely used as is the conventional apparatus. In this paper, the…
We study the transport properties of a neutral graphene sheet with curved regions induced or stabilized by topological defects. The proposed model gives rise to Dirac fermions in a random magnetic field and in a random scalar potential acting like a space-dependent Fermi velocity induced by the curvature. The last ter…
Cationic starch (D.S. 0.065) and anionic starch (D.S. 0.037) were used to form biopolyelectrolyte multilayers. The influence of the solution concentration of NaCl on the adsorption of starch onto silicon oxide substrates and on the formation of multilayers was investigated using stagnation point adsorption reflectomet…
O − radical anions were observed over a partially hydroxylated MgO surface after illumination by monochromatic light with λ = 280 and 303 nm. As all corner oxygen atoms are covered with adsorbed hydroxyl groups after activation at 450 °C, this process is initiated by selective excitation of 3-coordinated complexes [Mg…
This paper summarizes experimental evidence of anomalous luminescence in Eu(2+)-doped fluoride crystals Ba(x)Sr(1-x)F(2) (x = 0, 0.3, 0.5 and 1). Luminescence, luminescence excitation spectra and luminescence kinetics obtained at ambient and high hydrostatic pressure at various temperatures are discussed. Hydrostatic…
Jute fabrics reinforced polypropylene (PP) composites (40% fiber by weight) are prepared using compression molding. Different formulations using oligomer urethane diacrylate (M-1100), monomers 2-ethyl hexyl acrylate (EHA), 1-vinyl 2-pyrrolidone (NVP), and photo-initiator (Irgacure-369) in methanol were prepared in ord…
Physical and mechanical properties of a new composite of 70% (by weight) old corrugated container recycled fibers, 27% high-density polyethylene, and 3% compatibilizer (maleic anhydride polyethylene) were evaluated with a focus on dimensional stability. Maximum water absorption, thickness swelling, width swelling, and…
In this paper a theory of multi-walled carbon nanotubes and a suitable way for modelling them using the finite element method is presented. A brief reference to FE modelling of a single-walled carbon nanotube (SWNT) is given as an introduction to modelling of multi-walled carbon nanotubes, consisting of several layers…
(Si : O x : C y : H z ) thin films were deposited on knitted wool fabrics by plasma-enhanced chemical-vapor deposition using hexamethyldisiloxane as a monomer and argon and oxygen as feed gases in low-pressure equipment. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses confirmed th…
In order to couple high cellular uptake and target specificity of dendrimer molecule with excellent optical properties of semiconductor nanoparticles, the interaction of cysteine-capped CdTe quantum dots with dendrimer was investigated through spectroscopic techniques. NH(2)-terminated dendrimer molecule quenched the…
Effects of the substitution of Fe by Co or Ni on the crystal structure of the n = 2 Ruddlesden−Popper phase Sr 3 Fe 2 O 6+δ have been studied by in situ high temperature neutron powder diffraction (NPD) in the temperature range 20 °C ≤ T ≤ 900 °C. The analysis of neutron diffraction data confirmed that for a given tem…