Size Tunable Synthesis of Gold Nanoplates by Gamma Irradiation in Presence of Polydiallyldimethylammonium Chloride as the Capping Agent

A simple gamma irradiation strategy was developed for the synthesis of gold nanoplates by employing polydiallyldimethylammonium chloride (PDDA) as the capping agent. The nanoplates produced had hexagonal, triangular and truncated triangular shapes and the size of the nanoplates could be varied from 500 nm to 5 μm by adjusting the concentration of Au3+ and PDDA in the solution. X-ray diffraction and selected area electron diffraction investigations proved that the nanoplates are single crystals bound by the {111} planes on the top and bottom surfaces. The nanoplates were also characterized by energy dispersive X-ray analysis and X-ray photoelectron spectroscopy.

Download Full-text

Ordering of Mg and Nb in the octahedral positions of the “cubic” perovskite structure of Pb3MgNb2O9

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1524/zkri.1971.134.1-2.44 ◽

1971 ◽

Vol 134 (1-2) ◽

Cited By ~ 24

Author(s):

H. Brigitte Krause ◽

Donald L. Gibbon

Keyword(s):

Electron Diffraction ◽

Single Crystals ◽

Perovskite Structure ◽

X Ray Diffraction ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Diffraction Patterns

AbstractSelected-area electron-diffraction patterns and x-ray diffraction powder patterns were taken of crushed single crystals of Pb

Download Full-text

Bimolecular and Monomolecular Lipid Films: Selected Area Electron Diffraction

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100063603 ◽

1969 ◽

Vol 27 ◽

pp. 338-339

Author(s):

Robert M. Glaeser ◽

David W. Deamer

Keyword(s):

Electron Diffraction ◽

Membrane Structure ◽

Molecular Organization ◽

Membrane Material ◽

X Ray Diffraction ◽

Membrane Systems ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Lipid Films ◽

Ultimate Objective

In the investigation of the molecular organization of cell membranes it is often supposed that lipid molecules are arranged in a bimolecular film. X-ray diffraction data obtained in a direction perpendicular to the plane of suitably layered membrane systems have generally been interpreted in accord with such a model of the membrane structure. The present studies were begun in order to determine whether selected area electron diffraction would provide a tool of sufficient sensitivity to permit investigation of the degree of intermolecular order within lipid films. The ultimate objective would then be to apply the method to single fragments of cell membrane material in order to obtain data complementary to the transverse data obtainable by x-ray diffraction.

Download Full-text

Growth of sillenite Bi12FeO20 single crystals: structural, thermal, optical, photocatalytic features and first principle calculations

Scientific Reports ◽

10.1038/s41598-020-78598-3 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Durga Sankar Vavilapalli ◽

Ambrose A. Melvin ◽

F. Bellarmine ◽

Ramanjaneyulu Mannam ◽

Srihari Velaga ◽

...

Keyword(s):

Single Crystal ◽

Single Crystals ◽

Photoelectron Spectroscopy ◽

Diffraction Method ◽

Lattice Parameter ◽

First Principle ◽

X Ray Diffraction ◽

X Ray ◽

First Principle Calculations ◽

Photodegradation Efficiency

AbstractIdeal sillenite type Bi12FeO20 (BFO) micron sized single crystals have been successfully grown via inexpensive hydrothermal method. The refined single crystal X-ray diffraction data reveals cubic Bi12FeO20 structure with single crystal parameters. Occurrence of rare Fe4+ state is identified via X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The lattice parameter (a) and corresponding molar volume (Vm) of Bi12FeO20 have been measured in the temperature range of 30–700 °C by the X-ray diffraction method. The thermal expansion coefficient (α) 3.93 × 10–5 K−1 was calculated from the measured values of the parameters. Electronic structure and density of states are investigated by first principle calculations. Photoelectrochemical measurements on single crystals with bandgap of 2 eV reveal significant photo response. The photoactivity of as grown crystals were further investigated by degrading organic effluents such as Methylene blue (MB) and Congo red (CR) under natural sunlight. BFO showed photodegradation efficiency about 74.23% and 32.10% for degrading MB and CR respectively. Interesting morphology and microstructure of pointed spearhead like BFO crystals provide a new insight in designing and synthesizing multifunctional single crystals.

Download Full-text

Hydrothermal Synthesis of Iodine-Doped Nanoplates with Enhanced Visible and Ultraviolet-Induced Photocatalytic Activities

International Journal of Photoenergy ◽

10.1155/2012/915386 ◽

2012 ◽

Vol 2012 ◽

pp. 1-12 ◽

Cited By ~ 5

Author(s):

Jiang Zhang ◽

Zheng-Hong Huang ◽

Yong Xu ◽

Feiyu Kang

Keyword(s):

Photocatalytic Activity ◽

Photoelectron Spectroscopy ◽

Oxygen Vacancies ◽

Diffuse Reflectance Spectroscopy ◽

Synergetic Effect ◽

X Ray Diffraction ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Transmission Electron ◽

Photocatalytic Activities

The iodine-doped Bi2WO6(I-BWO) photocatalyst was prepared via a hydrothermal method using potassium iodide as the source of iodine. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and selected area electron diffraction (SAED), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The photocatalytic activity of I-BWO for the degradation of rhodamine B (RhB) was higher than that of pure BWO and I2-BWO regardless of visible light (>420 nm) or ultraviolet light (<400 nm) irradiation. The results of DRS analysis showed that the I-BWO and I2-BWO catalysts had narrower band gaps. XPS analysis proved that the multivalent iodine species including I0and were coadsorbed on the defect surface of Bi2WO6in I-BWO. The enhanced PL intensity revealed that a large number of defects of oxygen vacancies were formed by the doping of iodine. The enhanced photocatalytic activity of I-BWO for degradation of RhB was caused by the synergetic effect of a small crystalline size, a narrow band gap, and plenty of oxygen vacancies.

Download Full-text

Single crystal growth and magnetic properties of Co-doped ZnNb2O6

Modern Physics Letters B ◽

10.1142/s0217984919502749 ◽

2019 ◽

Vol 33 (23) ◽

pp. 1950274

Author(s):

Ying Liu ◽

Dapeng Xu ◽

Huamin Yu ◽

Tian Cui ◽

Liang Li

Keyword(s):

Magnetic Properties ◽

Single Crystals ◽

Photoelectron Spectroscopy ◽

Physical Property Measurement System ◽

Physical Property ◽

X Ray Diffraction ◽

Zone Method ◽

X Ray ◽

Structure Formula ◽

Property Measurement

The columbite structure [Formula: see text] single crystals have been successfully grown by using the optical floating zone method. The as-grown crystals are characterized by X-ray diffraction (XRD), Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). All these analyses show that the doping Co ions do not disturb the structure of columbite [Formula: see text] and some [Formula: see text] ions are substituted by transition metal [Formula: see text] ions without any other impurities. The magnetic properties of as-grown [Formula: see text] crystals have been investigated using Physical Property Measurement System (PPMS). The effective magnetic moment of [Formula: see text] crystals is [Formula: see text], indicating that [Formula: see text] ions present in [Formula: see text] single crystals are in mixed HS and LS states. The ferromagnetic, antiferromagnetic and paramagnetic characters of as-grown crystals are also discussed.

Download Full-text

Comparison of Simulated and Experimental Order Parameters in FePt—II

Microscopy and Microanalysis ◽

10.1017/s1431927611000146 ◽

2011 ◽

Vol 17 (3) ◽

pp. 403-409 ◽

Cited By ~ 2

Author(s):

Karen L. Torres ◽

Richard R. Vanfleet ◽

Gregory B. Thompson

Keyword(s):

Electron Diffraction ◽

Order Parameter ◽

Convergent Beam Electron Diffraction ◽

Order Parameters ◽

X Ray Diffraction ◽

Chemical Order ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Convergent Beam ◽

Good Agreement

AbstractEight FePt thin film specimens of various thicknesses, compositions, and order parameters have been analyzed to determine the robustness and fidelity of multislice simulations in determining the chemical order parameter via electron diffraction (ED). The shape of the simulated curves depends significantly on the orientation and thickness of the specimen. The ED results are compared to kinematical scattering order parameters, from the same films, acquired from synchrotron X-ray diffraction (XRD). For the specimens analyzed with convergent beam electron diffraction conditions, the order parameter closely matched the order parameter as determined by the XRD methodology. However, the specimens analyzed by selected area electron diffraction conditions did not show good agreement. This has been attributed to substrate effects that hindered the ability to accurately quantify the intensity values of the superlattice and fundamental reflections.

Download Full-text

Note on the comparison of the subsidiary maxima in electron diffraction and X-Ray diffraction patterns from single crystals

Proceedings of the Physical Society ◽

10.1088/0959-5309/54/4/306 ◽

1942 ◽

Vol 54 (4) ◽

pp. 379-387 ◽

Cited By ~ 2

Author(s):

A Charlesby

Keyword(s):

Electron Diffraction ◽

Single Crystals ◽

X Ray Diffraction ◽

X Ray ◽

Diffraction Patterns ◽

Subsidiary Maxima

Download Full-text

Application of the Energy-Dispersive X-ray diffraction method to determine static and dynamic displacements close to D in Ta single crystals

Journal of Applied Crystallography ◽

10.1107/s0021889884010967 ◽

1984 ◽

Vol 17 (1) ◽

pp. 33-38 ◽

Cited By ~ 5

Author(s):

G. Steyrer ◽

T. H. Metzger ◽

J. Peisl

Keyword(s):

Single Crystals ◽

Diffraction Method ◽

Energy Dispersive ◽

X Ray Diffraction ◽

X Ray

Download Full-text

Synthesis and Characterization of a New Aluminum-Doped Bismuth Subcarbonate

Crystals ◽

10.3390/cryst9090466 ◽

2019 ◽

Vol 9 (9) ◽

pp. 466

Author(s):

Loisangela Álvarez ◽

Blanca Rojas de Gascue ◽

Rolando J. Tremont ◽

Edgar Márquez ◽

Euclides J. Velazco

Keyword(s):

Infrared Spectroscopy ◽

Photoelectron Spectroscopy ◽

Energy Dispersive ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

Characterization Methods ◽

X Ray ◽

Fourier Transformed Infrared Spectroscopy ◽

Anionic Part

A new compound, Bi2O2CO3:Al, was synthesized by the coprecipitation method. The characterization was done by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), electronic scanning microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The characterization methods allowed to identify the Bi2O2CO3:Al compound, such as the Al-doped Bi2O2CO3 by XRD, the anionic part (CO32−) by FTIR, and the presence of aluminum in the compound by XPS and EDX. It was confirmed to have a nanostructure like a nanosheet and a microstructure that resembles a type sponge by SEM.

Download Full-text