Materials Literature
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The strong size dependence of the properties of silicon nanoparticles smaller than 5 nm sharply distinguishes them from all other phases of the condensed silicon. If the other phases, for example, a:Si, c-Si or mcSi, can be characterized by well-defined properties averaged over the volume (see Table 2.1), the properti…
In general, nanostructures with relatively small sizes constitute excellent signal transduction elements when dealing with biological analytes or chemical species. The reason for this is the similarity of the order of size between nanostructures and biological analytes and chemical species. The consequence of this iss…
This chapter presents an overview of the growth behavior of zinc oxide (ZnO) nanostructures on the nonconventional substrates such as paper, plastics, and polymer, with special attention to recent developments in ZnO nanostructures growth on paper substrates and their utilization for different applications. Various me…
The Scherrer formula, the Williamson-Hall plot and the Warren-Averbach method are the most misused tools for the quantitative estimation of the “average size” of a nanocrystalline powder from an X-ray diffraction pattern. In fact, it will be shown that, even if mathematically correct, the result of the traditional ana…
Porous silicon (P-Si) became known for the first time in 1956 in a publication by A. Uhlir, in which the material was obtained as a byproduct of photoelectrochemical etching of holes in the plates of crystalline silicon (Uhlir, 1956). Two years later, D. Turner (Turner, 1958) examined in more detail and described P-Si…
As is known from solid state physics (Ashcroft and Mermin, 1979a and 1979b; Davydov, 1976; Kittel, 1978), the solids can be classified according to the nature of electrical conductivity as electrical conductors (usually metals), semiconductors and insulators (dielectrics). Appreciable conductivity is typical of conduc…
A series of nanocomposites composed of poly(propylene carbonate)(PPC) and ZnO nanoparticles (NPs) were synthesized and characterized. Initially, (3-glycidyloxypropyl)trimethoxysilane was used to introduce epoxide groups onto the ZnO surface. Subsequently, the modified ZnO NPs were incorporated in PPC matrices by ring-…
Within the framework of the European Metrological Research Program (EMRP) IND04 MetroMetal 'Ionizing radiation metrology for the metallurgical industry', joint research carried out by 14 metrological institutions from countries within the European Union and the company ENVINET, questions concerning the determination o…
The luminescence gap in the regioregular poly(3-hexylthiophene) film is shown to be 1.93 eV at 16 K from the excitation energy dependence of the luminescence spectrum. The self-trapped exciton, of which the luminescence is due to the recombination, is suggested to consist of a self-trapped hole and an electron bound a…
Abstract Pure polycrystalline bulk samples and single crystals of InNb(TeO4)2, are prepared by solid state reaction of In2O3, Nb2O5, and TeO2 in the molar ratio of 1:1:6 (evacuated quartz tube, 800 °C, 2 d; controlled cooling).
ResumoO cancro da tiroide é tipo de neoplasia endócrina mais frequente, estando na maioria das vezes associado a um excelente prognóstico que deve à terapia com iodo radioativo.Como a única função do iodo no organismo humano está relacionada com a síntese de hormonas tiroideias que ocorre na própria glândula tiroideia…
Strontium titanate (SrTiO3) thin films were deposited on corning glass by using dip coating method. Strontium nitrate, titanium (IV) isopropoxite, ethylene glycol and nitric acid have been use to prepared sol-gel of strontium titanate. Structural and its surface morphologies of the films were characterize by using X-r…
Bernardeli, V. R. Study on the behavior of Switched Reluctance Generator in self-excited operation mode, UFU
Formulae of magnetic field enhancement at a two-dimensional semi-elliptical bump and a two-dimensional pit with chamfered edges are derived by using the method of conformal mapping. The latter can be regarded as an approximated model of the two-dimensional pit with round edges.
Abstract Two new asymmetrical 3-( p -R-phenyl)-4-amino-5-(2-pyridyl)-1,2,4-triazoles ( 3a , R = CH 3 and 3b , R = OCH 3 ) were synthesized with a yield of 58% and 69%, respectively. The compounds 3a and 3b were characterized with FT-IR, 1 H NMR, ESI-MS spectra, and elemental analysis. Additionally, their molecular and…
The Ge concentration play an importion role in SiGe channel Fin-FET device. A fast, more convenient, and nondestructive analysis method, three-dimensional spectroscopic ellipsometry-optical critical dimension metrology (3D SE-OCD), is used to extract Ge concentrations of SiGe channel FinFETs. The refractive index (n)…
The pressurized heavy water reactors make use of heavy water in moderator and in primary heat transport system. The cationic fission products produced during the reactor operation such as Cesium, Strontium, Cobalt, Palladium, Ruthenium and anions Iodide, Iodate, Ruthenate etc. contaminate the heavy water. Columns cont…
The three-dimensional Zn(II) coordination polymer poly[[bis(μ2-benzene-1,4-dicarboxylato){μ4-N(1),N(3),N(5)-tris[(pyridin-3-yl)methyl]benzene-1,3,5-tricarboxamide}dizinc(II)] monohydrate], {[Zn2(C8H4O4)2(C27H24N6O3)]·H2O}n, is characterized by a rare (4,4,4)-connected (4.6(2).7(2).8)(4.6(2).7(3))(4(2).6(2).7(2)) topol…
Abstract Review: 131 refs.
Abstract Ln(IO3)3 (Ln = Ce, Nd, Eu, Gd, Er, Yb) polycrystals are hydrothermally prepared using aqueous solutions of Ln(NO3)3 or Ln2O3 and HI as precursors (autoclave, 230 °C, 24 h).