Materials Literature
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Y2O3 thin films are fabricated on Si (100) wafer by using showerhead type direct PEALD system. The commercial tris (methylcyclopenta dienyl) yttrium ((MeCp3)3Y) precursor and oxygen plasma are used as a precursor and as a reactant. The growth rate per cycle is increased slightly from 0.1nm/cycle to 0.13nm/cycle, as th…
Y 2 O 3: Eu 3+, Tb 3+ nanopowders were prepared by co-precipitation method with NH 4 HCO 3 as precipitant. The nanopowders with different calcined temperatures and Eu 3+/ Tb 3+ doped ratio were characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM) and fluorescence spectrophotometer. The results…
We investigate decoherence of an electron in graphene caused by electron-flexural phonon interaction. We find out that flexural phonons can produce a dephasing rate comparable to the electron-electron one. The problem appears to be quite special because there is a large interval of temperature where the dephasing indu…
Poly(4-vinylpyridine) was covalently wrapped onto ZnO nanoparticles through surface initiated Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerization upon grafting from protocol. The surface of ZnO nanoparticles was initially modified by the coupling reaction with silane leading to trithiocarbonate func…
Optically active polyamides containing axially asymmetric 9,9′-spirobifluorene units in the main chain were synthesized for the first time by low-temperature solution polycondensation of ( R)-2,2′-bis(4-amino-2-trifluoromethylphenoxy)-9,9′-spirobifluorene with various diacyl chlorides. All these polymers were obtained…
In this work, submicro-composites of LiYF4:Yb3+, Er3+ and reduced graphene oxide (r-GO) have been synthesized via a facile hydrothermal route in the presence of surfactant EDTA and r-GO. Subsequently, the LiYF4:Yb3+, Er3+ submicro-composites are annealed in order to improve the crystallinity. The mechanism of growth e…
A polymer-free technique for generating nanopatterns on both synthesized and exfoliated graphene sheets is proposed and demonstrated. A low-energy (5-30 keV) scanning electron beam with variable repetition rates is used to etch suspended and unsuspended graphene sheets on designed locations. The patterning mechanisms…
Industrial AM60 magnesium alloy, to which mixed rare earth containing Y, Gd and Nd elements is added, was used to study the effects of rare earth (RE) on their casting microstructures and properties. The experimental results showed that RE could effectively improve grain refinement and the internal organization, which…
Effect of pulsed magnetic field treatment on the microstructure and mechanical properties of Mg97Y2Zn1 alloy has been investigated. When the pulsed magnetic field is applied on the alloy in semi-solid state, the α-Mg was modified from developed dendrite to fine rosette, resulting in a refined solidification microstruc…
This paper studies the fire taking multi-layer fabric thermal protection performance of the system, respectively from the single thermal protective performance of fabric and ten kinds of multilayer composite fabric through analyzing the thermal protective performance, The following conclusions: in terms of single flam…
Isatin Schiff base, 3-(4-hydroxyphenylimino) indolin-2-one, was investigated as an corrosion inhibitor in NaCl solution. The structure was analysized by X-ray single diffraction. The inhibition and the mechanism of the title compound on the corrosion of high protective Q235A steel in NaCl solution were screened and di…
Two-phase samples were prepared by mixing Fe, Cu, and Al particles (<50 µm) in lithium multipurpose grease with different weight fractions of Fe, Cu, and Al powders. Effective thermal conductivity of these samples has been measured by a laboratory-made thermal conductivity probe as a function of weight fraction of fil…
ABSTRACT The application of emerging nanotechnologies in medicine showed in the last years a significant potential in the improvement of therapies. In particular, polymeric nanocarriers are currently tested to evaluate their capability to reduce side effects, to increase the residence time in the body and also to obta…
The clay mineralogy and formation of hydroxy-interlayered vermiculite (HIV) in the Jiujiang red earth sediments were investigated using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and inductively coupled plasma-atomic emission spectrometer (ICP-AES)…
Natural convection heat transfer from horizontal rod bundles in Nxm × Nym arrays (Nxm, Nym = 5–9) in liquid sodium was numerically analyzed for three types of the bundle geometry (in-line rows, staggered rows I and II). The unsteady laminar two-dimensional basic equations for natural convection heat transfer caused by…
Siro-spinning (two-strand yarn spinning) is a new kind of modified ring spinning method, which is achieved by feeding two rovings into the apron zone at a predetermined separation simultaneously. There are three spinning triangles, including two primary spinning triangles and one final spinning triangle, in Siro-spinn…
Hydroxypropyl-β-cyclodextrin (HP-β-CD) is commonly used as a complexation reagent to solubilize compounds with poor aqueous solubility to improve in vivo dosing. However, the degree of solubility enhancement was often limited by the formation of only a 1:1 complex and a low complexation constant (K). Such a limitation…
Foam buffer package materials composed of plant fibers have been a focus of research in recent years because of their environmentally beneficial ability to become fully disintegrated. In this study, bleached bagasse pulp was micronized using a PFI mill, and foam buffer materials were prepared using the micronized fibe…
The work is aimed at using the chaos synchronization error dynamics (CSED) technique for defect pattern recognition in gas insulated switchgear (GIS). The radiated electromagnetic waves generated due to internal defects were measured by the self-made ultrahigh frequency (UHF) micro-strip antenna, so as to determine wh…
Na-substituted BiFeO3 films were prepared on FTO/glass substrates using the sol–gel method. XRD results showed that all films adopted random orientation and an R3m perovskite structure. UV–Vis absorption results indicated that the films exhibited intense absorbance around 450 nm. The band gaps were 2.59 eV, 2.63 eV, 2…