scholarly journals Growth of Semimetals Bismuth and Antimony Films on Reactive Substrate

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Xiao Wang ◽  
Xiaoxing Wei ◽  
Caixia Song
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Growth Process ◽  
Hierarchical Structures ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hierarchical Microspheres ◽  
Microscopy Images ◽  
Scanning Electron

Semimetal Bi and Sb thin films with novel hierarchical structures were synthesized on zinc substrate via a hydrothermal method. X-ray diffraction (XRD) analysis confirmed the formation of pure semimetals Bi and Sb. Scanning electron microscopy images showed that Bi films constructed with microtube arrays and hierarchical microspheres can be obtained selectively by altering the concentration of Bi3+ions. The synthesized Sb films were constructed with bowl-shaped particles. The growth process of these semimetal architectures was briefly discussed.

Solvothermal Synthesis and Electrochemical Properties of Hairball-Like Bismuth Trisulphide Microcrystallines

2011 ◽  
Vol 233-235 ◽  
pp. 2289-2293
Author(s):  
Pin Jiang Li ◽  
Wen Jun Fa ◽  
Yan Ge Zhang ◽  
Bao Jun Huang ◽  
Yi Dong Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solvothermal Synthesis ◽  
Growth Process ◽  
Solvothermal Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
One Step ◽  
Scanning Electron

Hairball-like bismuth trisulphide microcrystallines has been successfully prepared via one step solvothermal process and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) techniques. The morphologies of the Bi2S3 microcrystallines were influenced by reaction time, temperature, the mole ratio of the reactants and concentration of starting materials, and the growth process has been proposed. The electrochemical behavior of Bi2S3 was investigated using the cyclic voltammetry.

scholarly journals Influence of Processing Type in the Morphology of Membranes Obtained from PA6/MMT Nanocomposites

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Rodholfo da Silva Barbosa Ferreira ◽  
Caio Henrique do Ó Pereira ◽  
Rene Anisio da Paz ◽  
Amanda Melissa Damião Leite ◽  
Edcleide Maria Araújo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Screw Extruder ◽  
X Ray ◽  
Membrane Morphology ◽  
Twin Screw ◽  
Microscopy Images ◽  
Scanning Electron

The nanocomposites have an extensive use in the current process of membrane preparation, taking into account their unique features as membranes. Thus, the study of nanocomposite processing to obtain membranes is highly important. In this work, Brazilian clay was used (Brasgel PA) for the preparation of polyamide/clay nanocomposite. The nanocomposites were produced in a high rotation homogenizer and in a twin screw extruder. From the nanocomposites and pure polymers processed in the two equipments, membranes were prepared by the immersion-precipitation method, using formic acid as solvent. By X-ray diffraction (XRD), the formation of exfoliated and/or partially exfoliated structures with changes in the crystalline phases of the polyamide was observed. From scanning electron microscopy images, it was observed that the processing clearly influenced the membrane morphology.

Comparison of Mechanical Properties and Microstructure of Annealed and Quenched Ti-Nb Alloys

2018 ◽  
Vol 769 ◽  
pp. 29-34 ◽  
Author(s):  
Alexander Thoemmes ◽  
Ivan V. Ivanov ◽  
Adelya A. Kashimbetova
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Β Phase ◽  
Α Phase ◽  
Nb Content ◽  
Scanning Electron

The effect of Nb content on microstructure, mechanical properties and phase formation in annealed and quenched binary Ti-Nb alloys were investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis. The content of Nb varied in the range 0-37 mass % leading to significant changes in the microstructure. The annealed and furnace-cooled binary Ti-Nb samples exhibited HCP martensitic α` phase at a Nb content below 14 mass % and stable BCC β phase at higher contents of Nb. The structure of the quenched samples changed with increase of Nb content in the following order: coarse primary martensite → fine acicular (α`+α``) martensite → single β phase structure. The mechanical properties of alloys strongly depended on the Nb content and type of the dominating phase.

THERMAL EVAPORATION SYNTHESIS OF ZnO MICROSHELLS

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2722-2727
Author(s):  
Y. J. XING ◽  
D. P. YU ◽  
Z. H. XI ◽  
Z. Q. XUE
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Zinc Oxide ◽  
Growth Process ◽  
Thermal Evaporation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

We demonstrate the synthesis of zinc oxide microshells by thermal evaporation of ZnO and Zn powders. X-ray diffraction (XRD), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) observations reveal that the products are ZnO microshells with hollow cores, of which the wall thickness is about several hundred nanometers. The possible growth process is discussed.

Intergrowth of several solid phases from the Y–Ni–B–C system in a large YNi2B2C crystal

2008 ◽  
Vol 41 (4) ◽  
pp. 738-746 ◽  
Author(s):  
Torsten Weissbach ◽  
Tilmann Leisegang ◽  
Andreas Kreyssig ◽  
Matthias Frontzek ◽  
Jens-Uwe Hoffmann ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
X Ray Diffraction ◽  
Orientation Relation ◽  
X Ray ◽  
Polished Cross Section ◽  
Diffraction Patterns ◽  
The Individual ◽  
Microscopy Images ◽  
Scanning Electron

A YNi2B2C single crystal containing traces of foreign phases was inspected by means of neutron and X-ray diffraction as well as scanning electron microscopy and X-ray spectroscopy methods. The diffraction patterns obtained from the experiments look similar to those expected for a superstructure. Nevertheless, they can be interpreted as crystallographically oriented precipitations of YB2C2and Ni2B within the YNi2B2C crystal, formed during the cooling process. The orientation relation between the lattices was obtained from experimental neutron and X-ray data. Structure refinements of the collected X-ray data were performed by separation of the intensity data of the individual phases. Scanning electron microscopy images of the inclusions found on a polished cross section of the crystal are presented; their chemical composition was determined using wavelength-dispersive X-ray analysis.

High Sensitivity Electrochemical Multisensors based on Graphene-PANI Nanocomposite for Simultaneous Detection of Glucose and Urea

2016 ◽  
Vol 19 (3) ◽  
pp. 145-150 ◽  
Author(s):  
Meysam Karimi ◽  
Mohammad Rabiee ◽  
Mojgan Abdolrahim ◽  
Mohammadreza Tahriri ◽  
Daryoosh Vashayee ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cyclic Voltammetry ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Xrd Analysis ◽  
Experimental Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

We present a study of the effect of graphene–PANI nanocomposites on the sensitivity of the urea and glucose multisensory. We used an electroctrochemical multisensor based on two electrodes located in a reservoir with two separate channels. The urease and glu-cose oxidase (GOD) were employed for detecting the urea and glucose, respectively. We characterized the graphene and graphene-PANI samples with X-ray Diffraction (XRD) analysis and scanning electron microscopy (SEM) observations. We further performed the Cyclic voltammetry and Amperometry tests. The collected experimental results revealed that the intensity of the peak significantly increases with the concentration of the urea and glucose.

Fabrication of Highly Ordered Arrays of TiO2 Nanotubes on Ti Wires

2012 ◽  
Vol 624 ◽  
pp. 63-66
Author(s):  
Ming Ya Li ◽  
Jian Min Wang ◽  
Jing Guo ◽  
Yue Liu Li ◽  
Xiao Qiang Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Xrd Analysis ◽  
Internal Diameter ◽  
Outer Diameter ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ordered Arrays ◽  
Glycol Solution ◽  
Scanning Electron

Highly Ordered arrays of TiO2 nanotubes on Ti wire were prepared by anodic oxidation with ethylene glycol solution of NH4F electrolyte. The phase compositions of the samples were characterized using X-ray diffraction (XRD) analysis using Cu-Kα radiation. The microstructure was observed using scanning electron microscopy (SEM). Experimental results show that at the anode condition of 95V, 50°C, and then themal treatment at 550°C, the highly ordered anatase TiO2 nanotubes arrays arranged on the surface of Ti wire. The length of the nanotube achieved was about 31μm, the internal diameter and outer diameter of the nanotube was 127nm and 170nm, respectively.

Higher Photocatalytic Activity of P-Incorporated TiO2 Nanotube Arrays

2015 ◽  
Vol 1087 ◽  
pp. 452-456
Author(s):  
Khairul Arifah Saharudin ◽  
Srimala Sreekantan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Degradation Rate ◽  
Oxygen Vacancies ◽  
Xrd Analysis ◽  
Nanotube Arrays ◽  
Photoluminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

TiO2 nanotubes arrays were prepared by anodization of Ti in EG containing H3PO4 and NH4F electrolyte. The samples were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDX) and photoluminescence spectra (PL). The as-anodized TiO2 nanotubes were annealed in inert (argon), reducing (nitrogen), or oxidizing (oxygen) atmosphere at 400 °C for 4 hr. XRD analysis revealed that the TiO2 nanotubes were anatase after annealing. In this study, the TiO2 nanotubes annealed in argon exhibited the highest degradation rate of methyl orange (MO) solution under ultraviolet irradiation among the samples. The degradation rate was approximately 98% after 5h, which may be ascribed to the large amount of oxygen vacancies and defects (phosphorus) within the Ar - TiO2 sample that simultaneously increased the degradation rate of MO.

scholarly journals SYNTHESIS AND DIELECTRIC PROPERTIES OF FOUR-LAYERED AURIVILLIUS SrBi4Ti4O15 DOPED Nd3+ AND Mn4+

2016 ◽  
Vol 11 (2) ◽  
pp. 127
Author(s):  
Sestry Misfadhila ◽  
Evi Adhelina ◽  
Yestria Rilda ◽  
Syukri Arief ◽  
Zulhadjri Zulhadjri
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dielectric Constant ◽  
Xrd Analysis ◽  
Orthorhombic Symmetry ◽  
Molten Salt Method ◽  
X Ray Diffraction ◽  
Aurivillius Phase ◽  
X Ray ◽  
Scanning Electron

<p>Synthesis of four-layered Aurivillius compound doped with Nd<sup>3+</sup> and Mn<sup>4+ </sup>cations, SrBi<sub>3.5</sub>Nd<sub>0.5</sub>Ti<sub>4-x</sub>Mn<sub>x</sub>O<sub>15</sub> (<em>x</em> = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na<sub>2</sub>SO<sub>4</sub>/K<sub>2</sub>SO<sub>4</sub> as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by <em>Le Bail</em> technique. The results of XRD analysis show that the four-layered Aurivillius compound formed, however there are additional peaks identified as perovskite and Bi<sub>7.68</sub>Ti<sub>0.32</sub>O<sub>12.16</sub>  phases for <em>x</em> = 0 and perovskite and Sr<sub>4</sub>Ti<sub>3</sub>O<sub>10</sub>phases for <em>x</em> = 0.5 and 1. The results of refinement show that four-layered Aurivillius phase formed has orthorhombic symmetry with <em>A2<sub>1</sub>am</em> space group. Scanning Electron Microscopy (SEM) shows the plate like morphology that are characteristic of Aurivillius compound. Dielectric constant of the samples show increasing value as increasing of Mn<sup>4+</sup> concentration.</p>

Effects of Plasma Nitriding on Low Temperature Salt-Bath Chromizing of W18Cr4V Steel

2011 ◽  
Vol 213 ◽  
pp. 543-547
Author(s):  
Jin Ling Ye ◽  
Feng Ye
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Low Temperature ◽  
Plasma Nitriding ◽  
Xrd Analysis ◽  
Salt Bath ◽  
Chromium Concentration ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Effects of plasma nitriding on low temperature salt-bath chromizing of W18Cr4V steel is studied .The chromizing process is investigated by means of optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffraction (XRD). Results show that the specimens are chromized successfully by low temperature salt-bath subjected to plasma nitriding. A chromized layer with average 3.3μm in thickness and 1200HV-1300HV in microhardness is formed on the substrate by chromizing at 610°C for 6h. XRD analysis show that the chromized layer is composed of Cr23C6, CrN, Cr/Fe, (Cr, Fe)7C3 , (Cr, Fe)2N and the surface chromium concentration reaches 77.67%.

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