Materials Literature
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We present here a study of the radial modes for infinitely long cylinders and cylindrical shells of general anisotropic crystals. The elastic coefficients matrix includes twenty-one independent constants. We obtain expressions in closed form for the dispersion relation, valid for any anisotropic material. In the case…
We investigate the effect of water adsorption on the electrical properties of graphene oxide (GO) films using the direct current (DC) measurement and alternating current (AC) complex impedance spectroscopy. GO suspension synthesized by a modified Hummer's method is deposited on Au interdigitated electrodes. The strong…
Hydrogen peroxide (H(2)O(2)) is an endogenous molecule that plays diverse physiological and pathological roles in living systems. Here we report multimolecule integrated nanoprobes with the enhanced chemiluminescence (CL) response to H(2)O(2) that is produced in cells and in vivo. This approach is based on the nanosco…
Nano-TiO(2) has the highest production of all nanomaterials, and pigment-TiO(2) is a commodity used on the million tons/year scale. Information on the release of TiO(2) from consumer products is therefore an important part of analyzing the potential environmental exposure to TiO(2). For this study, we investigated the…
The generation of supramolecular architectures with well-defined structures and functionalities is recently garnering attraction. Self-assemblage of amphiphilic polymers leads to the formation of polymeric micelles that demonstrate unique set of characteristics such as excellent biocompatibility, low toxicity, enhance…
A new electrodeposition route was developed to prepare p-type CuFeO2 as a thin film-type electrode for use as a photocathode in a solar water splitting cell. The resulting p-CuFeO2 film has a bandgap energy of ca. 1.55 eV, with its conduction band edge located at a more negative potential than the reduction potential…
In this review, homogeneous and heterogeneous grafting from cellulose and cellulose derivatives by ring-opening polymerisation (ROP) are reported. Cellulose is biorenewable and biodegradable as well as a stiff material with a relatively low specific weight, foreseen to be an excellent replacement for synthetic materia…
We report the realization of field-effect transistors (FETs) made with chemically synthesized multilayer crystal semiconductor WS2. The Schottky-barrier FETs demonstrate ambipolar behavior and a high (∼105×) on/off current ratio at room temperature with current saturation. The behavior is attributed to the presence of…
Graphene has attracted enormous attention for radio-frequency transistor applications because of its exceptional high carrier mobility, high carrier saturation velocity, and large critical current density. Herein we report a new approach for the scalable fabrication of high-performance graphene transistors with transf…
Abstract ZnO nanoparticles were prepared by coprecipitation method at 450C. X-ray diffraction result indicates that the sample is having a crystalline wurtzite phase. Transmission electron microscopy (TEM) result reveals that the ZnO sample is spherical in shape with an average grain size of about 50nm. X-ray peak bro…
摘要： 以D-甘露糖和2,4-二羟基二苯甲酮(UV-O)为原料，合成了新型的紫外线吸收剂（3-羟基-4-苯甲酰基）苯基-2,3;4,6-二-O-亚环己基-D-β-吡喃甘露糖苷（UV-O-DHM），其完全分解温度可达372.6 ℃，具有很好的热稳定性。 将UV-O-DHM均匀地掺入聚乳酸(PLA)的二氯甲烷溶液中，通过静电纺丝制得了可生物降解的抗紫外线PLA超细纤维膜。 采用扫描电子显微镜观察了纤维形貌，纤维的粗细均匀，直径为3~4 μm，且纤维表面有均匀的纳米孔结构。 随着PLA纤维中UV-O-DHM浓度的增大超细纤维的紫外辐射透过率降低。 当UV-O-DHM的掺入量为1.1%时，在230~350 nm范围内，透过率基本接近于0，…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
There was a certain amount of fibers in paper sludge, including the short fiber and small fiber. Collagen fiber was a compound with high bond energy, which can be reused from the leather solid waste, and contained many polar groups. Both fibers can be well combined with Hydrogen bond. So the collagen fiber and paper s…
Microstructure, piezoelectric properties and dielectric behavior of undoped and MoO3-doped lead-free (K0.44Na0.52Li0.04)(Nb0.86-xTa0.10-xSb0.04-x)Mo5/6xO3(KNL-NTS) was investigated. Samples were obtained by the conventional solid state reaction. X-ray diffraction (XRD) and Raman spectra revealed the formation of a per…
In the article the results of the design and analysis of mathematical model for determining residual stresses in the surface of layer at parts processed by plastic surface deformation (PSD) in which the rollers having an arbitrary shape and size. It is shown that for the calculation of stresses in the surface of layer…
A comparative study is made regarding the effect of the mechanical activation of carbonate acidic (BaCO 3 -HBO 2 /H 3 BO 3 ) 2 and carbonate-acidic fluoride (BaCO 3 -Na 2 CO 3 -NaF-(HBO 2 /H 3 BO 3 ) 2 ) systems on the thermal synthesis of barium metaborate β-BaB 2 O 4 and fluoroborate Ba 2 Na 3 [B 3 O 6 ] 2 F.
In this paper, we reported that firewood-like CeO 2 nanostructures were synthesized via hydrothermal method in the present of cetyltrimethylammonium bromide (CTAB) for the first time. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were used to c…
Excellent electron-field emission properties of carbon nanotubes (CNTs) attract essential scientific and practical interests. The small gap between top of the emitter and the anode essentially increases the field enhancement factor. The screening effect reduces the field emission current of a CNT placed in an array of…
The relaxation behaviors of PS below Tg and its variation trend along with aging time were studied by DSC, fluorescence spectrum and XRD. On the basis of DSC results, the kinetics of the volume and enthalpy relaxation process were analyzed, and the influence of the aging time on the relaxation behaviors were discussed…
Recent developments in polymeric dielectric nanocomposites have shown that these novel materials can improve design of high voltage components and systems. MMT(Montmorillonite)has an excellent corona performance and PI/MMT nanocomposite films can be prepared by in-situ polymerization process in this paper. Dielectric…