نتایج جستجو برای: ray diffraction measurement then

تعداد نتایج: 1484604  

2012
M. Bhanu Prakash Subhankar Paul

In the present study, silver nanoparticles were rapidly green synthesized from AgNO3 solution using leaf extract of Vinca Roseus at room temperature. The green synthesized Silver Nanoparticles were characterized by UV–Visible absorption spectroscopy and further by analytical techniques such as, DLS, X-ray diffraction (XRD) and SEM. X-ray diffraction and Scanning Electron Microscope analysis stu...

Journal: :Nanotechnology 2012
Chao-Wei Hsu Yung-Feng Chen Yan-Kuin Su

GaAs is grown by metal-organic vapor-phase epitaxy on a 55 nm round-hole patterned Si substrate with SiO(2) as a mask. The threading dislocations, which are stacked on the lowest energy facet plane, move along the SiO(2) walls, reducing the number of dislocations. The etching pit density of GaAs on the 55 nm round-hole patterned Si substrate is about 3.3 × 10(5) cm(-2). Compared with the full w...

2015
R. Kannan D. Jayaraman S. Aravindhan J. F. Nicoud R. J. Twieg E. Gallegos-Loya E. Orrantia-Borunda A. Duarte-Moller M. Delfino Nalini Jayanthi A. R. Prabhakaran D. Subashini J. B. Benedict P. M. Wallace P. J. Reid S. H. Jang B. Kahr

Bulk single crystals of pure and xylenol orange dye (XO) admixtured L-Alanine Thiourea (LATU) were grown by slow evaporation technique. The cell parameters and crystallinity of pure and dye admixtured LATU crystals were confirmed by single crystal, powder X-ray diffraction and high resolution X-ray diffraction analyses. The functional groups present in the crystals were confirmed by FTIR analys...

2002
Ho-kwang Mao Jinfu Shu Yingwei Fei Jingzhu Hu Russell J. Hemley

High-pressure energy dispersive X-ray diffraction of wi~stite has been obtained with three types of diamond cells; each one is designed to optimize a type of in situ study, namely single-crystal X-ray diffraction, deviatoric strain measurement, or simultaneous high-P-T experimentation. The results demonstrate that above 17 GPa at 300 K wiastite undergoes a displacive transition from B 1 to a rh...

2003
S. S. Babu J. M. Vitek S. A. David T. Palmer J. W. Elmer

Austenite formation and its decomposition control the final microstructure and performance of steel welds. This paper presents an in-situ characterization of austenite formation and its decomposition in both the fusion zone (FZ) and heat-affected zone (HAZ) of an Fe-C-Al-Mn steel using time-resolved X-ray diffraction (TRXRD) with synchrotron radiation. Measurement of X-ray diffraction spectra a...

2016
Nicodemus Edwin Widjonarko Andriy Voronov

X-ray diffraction has been a standard technique for investigating structural properties of materials. However, most common applications in the organic materials community have been restricted to either chemical identification or qualitative strain analysis. Moreover, its use for polymeric thin films has been challenging because of the low structure factor of carbon and the thin film nature of t...

2009
R. H. Vegter T. Pirling Jules Horowitz

In common with many engineering applications the introduction of compressive surface stresses plays an important role in the performance of roller bearings. Since the introduced stress profiles depend on the treatment method and the necessary balancing tensile stresses may have unexpected consequences, it is necessary to quantify the stresses throughout the bearing. Today, most characterization...

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