Preparation of water-dispersible graphene using N-methylmorpholine N-oxide monohydrate and its application for the preparation of nanocomposites using PEDOT

2015 ◽  
Vol 3 (27) ◽  
pp. 7105-7117 ◽  
Author(s):  
Dong-Hun Kim ◽  
Loon-Seng Tan ◽  
Soo-Young Park
Keyword(s):  
Electron Diffraction ◽  
Saed Pattern ◽  
Water Dispersible ◽  
Selective Area ◽  
Sem And Tem ◽  
Selective Area Electron Diffraction

SEM and TEM images (inset: selective area electron diffraction (SAED) pattern) of mono-layered water dispersible graphene (GPN) sheet by treatment ofN-methylmorpholineN-oxide monohydrate (NMMOm).

Observation of Domains and Phase Separation in Hydrated Lipid Bilayers

1975 ◽  
Vol 33 ◽  
pp. 496-497
Author(s):  
S. W. Hui ◽  
D. F. Parsons
Keyword(s):  
Phase Separation ◽  
Transition Temperature ◽  
Electron Diffraction ◽  
Lipid Bilayers ◽  
Dark Field ◽  
Selective Area ◽  
Observation Area ◽  
Field Electron Microscopy ◽  
Diffraction Patterns ◽  
Selective Area Electron Diffraction

The domain structure and phase separation in lipid single bilayers were observed directly by selective area electron diffraction (SAED) and selected reflection dark field electron microscopy (SRDFEM), using an environmental stage for a Siemens Elmiskop IA. The specimens were viewed in a fully hydrated state in the temperature range between 0°C and 50°C. Below the transition temperature, three orders of a hexagonal pattern were recorded, whereas diffuse rings only were seen above the transition temperature.Selective area electron diffraction were done by restricting the illumination area to few micrometers in diameter, using a pointed filament and a 10 μm second condenser aperture. Below the transition temperature of dipalmitoylphosphatidylchoiine bilayers, differentially oriented diffraction patterns were distinguishable between adjacent membranes areas (domains) five micrometers apart. Occasionally, two or more superimposed patterns were recorded from the same area, indicating the observation area covered several domains.

SYNTHESIS OF GRAPHITE OXIDE (GO)/Cu2O NANOCOMPOSITE AND ITS CATALYTIC PERFORMANCE UNDER THE ULTRASOUND

NANO ◽  
2013 ◽  
Vol 08 (03) ◽  
pp. 1350032 ◽  
Author(s):  
CHUNNIAN CHEN ◽  
CHENWEI YU ◽  
WEN FU
Keyword(s):  
Fourier Transform ◽  
Electrostatic Interactions ◽  
Catalytic Performance ◽  
X Ray ◽  
Selective Area ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Ir And Raman ◽  
Selective Area Electron Diffraction

GO/ Cu2O nanocomposite had been successfully synthesized by electrostatic interactions method. X-ray powder diffraction (XRD), transmission electron microscope (TEM), selective-area electron diffraction (SAED), Fourier transform infrared spectroscopy (FT-IR) and Raman spectra confirmed the structure of the Cu2O and GO/ Cu2O nanocomposite. The catalytic degradation of Rhodamine B under the condition of ultrasound was investigated and the result of UV-Vis spectroscopy demonstrated that the nanocomposite can efficiently degraded it.

Synthesis and Analysis of Nano-Crystalline LiNiVO4

2006 ◽  
Vol 510-511 ◽  
pp. 1142-0
Author(s):  
Titipun Thongtem ◽  
Sulawan Kaowphong ◽  
Somchai Thongtem
Keyword(s):  
Weight Loss ◽  
Citric Acid ◽  
Electron Diffraction ◽  
High Temperatures ◽  
Chelating Agent ◽  
Inverse Spinel ◽  
Sem And Tem ◽  
Nano Crystalline ◽  
Decomposition Processes

LiNiVO4 was synthesized using Li2CO3, NH4VO3 and Ni(CH3COO)2.4H2O as starting reagents and citric acid as a chelating agent. Mole ratios of metals to citric acid used for the preparation were 1 : 1 - 1 : 4. Carboxylate precursors were calcined at high temperatures to form powder. TGA data showed weight loss due to the evaporation and decomposition processes. FTIR showed the stretching bands of VO4 tetrahedron at 642, 713 and 813 cm-1. For 1 : 3 and 1 : 4 mole ratios, nano-crystals of inverse spinel LiNiVO4 (produced at 450 oC calcination for 6 h) were detected by XRD, electron diffraction, SEM and TEM.

scholarly journals Microstructural Aspect of Long Term Service of the Austenitic TP347HFG Steel / Wpływ Długotrwałej Eksploatacji Na Mikrostrukturę Stali TP347HFG

2015 ◽  
Vol 60 (4) ◽  
pp. 2901-2904 ◽  
Author(s):  
G. Golański ◽  
A. K. Lis ◽  
J. Słania ◽  
A. Zieliński
Keyword(s):  
Electron Diffraction ◽  
Grain Boundaries ◽  
Sem And Tem ◽  
Microstructural Aspect ◽  
The Matrix

The paper presents the results of research on the microstructure of austenitic creep-resisting TP347HFG steel after longterm service. The tests of the microstructure were performed using SEM and TEM. The identification of precipitates was carried out using selective electron diffraction. It has been shown that long-term service mostly contributes to the processes of precipitation of secondary NbC carbides inside grains and M23C6 carbides on grain boundaries. In the microstructure of the examined steel, also the processes of polygonization and recrystallization of the matrix were revealed.

The structure of trititanate nanotubes

2002 ◽  
Vol 58 (4) ◽  
pp. 587-593 ◽  
Author(s):  
Q. Chen ◽  
G.H. Du ◽  
S. Zhang ◽  
L.-M. Peng
Keyword(s):  
Average Diameter ◽  
High Resolution Electron Microscopy ◽  
Tube Axis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selective Area ◽  
Resolution Electron ◽  
Axis Parallel ◽  
New Type ◽  
Selective Area Electron Diffraction

A comprehensive chemical and structural analysis is made of a new type of trititanate nanotube, which is synthesized via the reaction of TiO2 particles with NaOH aqueous solution. It is found that the trititanate nanotubes are multi-walled scroll nanotubes with an inter-shell spacing of about 0.78 nm and an average diameter of about 9 nm. An atomic model of the nanotube is derived based on information from powder X-ray diffraction, selective-area electron diffraction, high-resolution electron microscopy and structure simulations. A model nanotube may be constructed by wrapping a (100) sheet of H2Ti3O7 along [001] with the tube axis parallel to [010].

Microwave Activation of Exfoliation in Ion–cut Silicon Layer Transfer

2007 ◽  
Vol 994 ◽  
Author(s):  
Douglas C. Thompson ◽  
T. L. Alford ◽  
J. W. Mayer ◽  
T. Hochbauer ◽  
J. K. Lee ◽  
...  
Keyword(s):  
Rutherford Backscattering Spectrometry ◽  
Silicon Layer ◽  
Silicon On Insulator ◽  
Cross Sectional ◽  
Selective Area ◽  
Atomic Force ◽  
Transmission Electron ◽  
Microwave System ◽  
Diffraction Patterns ◽  
Selective Area Electron Diffraction

AbstractMicrowave heating is used to initiate the ion-cut process for transfer of coherent silicon-layers onto insulator substrates. Hydrogen and boron co-implanted silicon was bonded to an insulative substrate before processing inside a 2.45 GHz, 1300 W cavity applicator microwave system. Sample temperatures measured using a pyrometer were comparable to previous ion – cut studies. Selected samples were further annealed to repair any damage created in the ion implant process. Rutherford backscattering spectrometry and selective area electron diffraction patterns show high crystallinity in transferred layers. RUMP simulation of backscattering spectra and cross-sectional transmission electron microscopy demonstrate that thicknesses of the transferred layers are comparable to previous ion-cut exfoliation techniques. Surface quality as characterized by an atomic force microscope compares well with previous ion-cut studies. Hall measurements were used to characterize electrical properties of transferred layers. The mobility and carrier density of microwave activated ion – cut silicon on insulator processed samples compares well with previous annealing techniques.

Transmission Electron Microscopy Observations on the Precipitates in Al-Zn-Mg Based Sacrificial Anode Alloy

2011 ◽  
Vol 704-705 ◽  
pp. 989-992
Author(s):  
Jing Ling Ma ◽  
Jiu Ba Wen ◽  
Quan An Li ◽  
Jun Feng Li
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cast Alloy ◽  
Hexagonal Structure ◽  
Sacrificial Anode ◽  
Orthorhombic Structure ◽  
Selective Area ◽  
Transmission Electron ◽  
Cubic Structure ◽  
Selective Area Electron Diffraction

nanoscale precipitates in the Al-Zn-In-Mg-Ti-Mn alloy were investigated by regular and high resolution transmission electron microscopy (TEM and HRTEM) and by selective area electron diffraction (SAED). The cast alloy contains the hexagonal structure MgZn2 and the orthorhombic structure Al6Mn precipitates, but after aged the precipitates of the cubic structure Mg2Zn11 were found. The Mg2Zn11 precipitates can act as activation centre, make the alloy pitting. But the activation of Al6Mn precipitates is very little.

Calculation Methods to Determine Crystallographic Elements: Interface Plane, Surfaces Plane and Twinning Elements, Based on Electron Diffraction Orientation Measurements by SEM and TEM

2010 ◽  
Vol 160 ◽  
pp. 11-16
Author(s):  
Claude Esling ◽  
Yu Dong Zhang ◽  
Jacques Muller ◽  
Xiang Zhao ◽  
Liang Zuo
Keyword(s):  
Electron Diffraction ◽  
Coordinate System ◽  
Sample Surface ◽  
Interface Plane ◽  
Calculation Methods ◽  
Orientation Data ◽  
Plane Normal ◽  
Sem And Tem ◽  
Diffraction Mode ◽  
Normal Vectors

In the present work, we summarize three calculation methods to determine some specific crystallographic elements based on electron diffraction orientation measurements by SEM and TEM. The first one is to determine the plane indices of the faceted interfaces where the orientation relation¬ships (ORs) between the adjacent crystals are reproducible. To acquire the orientation data, we need to prepare only one sample surface but not two perpendicular sample surfaces as usually required in the standard double trace method. The second is to characterize the surface crystalline planes and directions of a faceted nano-particle under TEM imaging and diffraction mode. With the determination of the edge trace vectors and then the plane normal vectors in the screen coordinate system of TEM, their Miller indices in the crystal coordinate system can be calculated through coordinate trans¬formation. The third method is to determine the twin type and the twinning elements based on the orientation information acquired by SEM EBSD measurements from the two twinned crystals through misorientation calculations. These methods will facilitate related studies.

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