نتایج جستجو برای: ray microscopy

تعداد نتایج: 469867  

2010
F Marone C Hintermüller S McDonald R Abela G Mikuljan A Isenegger M Stampanoni

Synchrotron-based X-ray Tomographic Microscopy is a powerful technique for fast non-destructive, high resolution quantitative volumetric investigations on diverse samples. At the TOMCAT (TOmographic Microscopy and Coherent rAdiology experimenTs) beamline at the Swiss Light Source, synchrotron light is delivered by a 2.9 T superbend. The main optical component, a Double Crystal Multilayer Monoch...

2008
G Chadzitaskos

We present a proposal for a X-ray optical element suitable for X-ray microscopy and other X-ray-based display systems. Its principle is based on the Fresnel lenses condition and the Bragg condition for X– ray scattering on a slice of monocrystal. These conditions are fulfilled simultaneously due to a properly machined shape of the monocrystal with a stress at its ends.

2002
Tobias Beetz Michael Feser Chris Jacobsen Janos Kirz David Sayre David Shapiro Yefim Sheynkin Aaron Stein Sue Wirick

Soft X-ray microscopy at the NSLS Tobias Beetz, Michael Feser, Holger Fleckenstein, Benjamin Hornberger, Chris Jacobsen, Janos Kirz, Mirna Lerotic, Enju Lima, Ming Lu, David Sayre, David Shapiro, Aaron Stein, Don Tennant, and Sue Wirick Department of Physics & Astronomy, Stony Brook University, Stony Brook NY 11794, USA Brookhaven National Laboratory, Upton, NY 11973-5000, USA New Jersey Nanote...

Journal: :Journal of microscopy 2000
M Berglund L Rymell M Peuker T Wilhein H M Hertz

We demonstrate sub-100 nm resolution water-window soft X-ray full-field transmission microscopy with a compact system. The microscope operates at lambda = 3.37 nm and is based on a 100 Hz table-top regenerative debris-free droplet-target laser-plasma X-ray source in combination with normal-incidence multilayer condenser optics for sample illumination. High-spatial-resolution imaging is performe...

Journal: :Journal of microscopy 2007
P A C Takman H Stollberg G A Johansson A Holmberg M Lindblom H M Hertz

We demonstrate compact full-field soft X-ray transmission microscopy with sub 60-nm resolution operating at lambda= 2.48 nm. The microscope is based on a 100-Hz regenerative liquid-nitrogen-jet laser-plasma source in combination with a condenser zone plate and a micro-zone plate objective for high-resolution imaging onto a 2048 x 2048 pixel CCD detector. The sample holder is mounted in a helium...

Journal: :Optics express 2003
S Mayo T Davis T Gureyev P Miller D Paganin A Pogany A Stevenson S Wilkins

In-line phase contrast enables weakly absorbing specimens to be imaged successfully with x-rays, and greatly enhances the visibility of fine scale structure in more strongly absorbing specimens. This type of phase contrast requires a spatially coherent beam, a condition that can be met by a microfocus x-ray source. We have developed an x-ray microscope, based on such a source, which is capable ...

Journal: :international journal of nano dimension 0
a. jegan. department of chemistry, sona college of technology, salem, india. a. ramasubbu department of chemistry, government arts college (autonomous), coimbatore, india. s. saravanan department of chemistry, sona college of technology, salem, india. s. vasanthkumar department of chemistry and nanotechnology, karunya university, coimbatore, india.

the magnetite (fe3o4) – agar nanocomposite was prepared by co-precipitation of fe (iii) and fe (ii) ions for the first time. the obtained samples were characterized by x-ray diffraction, fourier-transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. ft-ir results confirm the formation of fe3o4 nanoparticles in agar matrix. the xrd results revealed th...

Journal: :journal of nanostructures 2012
h. a. khorami m. keyanpour-rad a. eghbali m. r. vaezi

this paper reports the synthesis of polypyrrole coated sno2/znoelectrospunnanofibers via vapor phase polymerization method. in order to prepare one dimensional (sno2-zno)/polypyrrole with the core sheath structure, first sno2-zno composite nanofibers were synthesized via electrospinning method followed by adsorption of fe3+ on the surface of the sno2-zno nanofibers and finally pyrrole was polym...

Journal: :journal of physical & theoretical chemistry 2011
s. jalilehvand b. amirpour r. fazaeli m. h. givianrad a. mashinchian moradi

in this investigation we synthesized nax-nanozeolite by hydrothermal crystallization conditions.these nanoparticles were prepared at different conditions in a temperature controlled shaker. thesynthesized zeolites were characterized by instrumental analysis methods, such as x-raydiffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopy (sem) andtransmission electron microscopy (...

Journal: :Journal of structural biology 2012
Joaquin Oton C O S Sorzano Eva Pereiro Jesús Cuenca-Alba Rafael Navarro Jose M Carazo Roberto Marabini

Soft X-ray Tomographic (TomoX) microscopy has become a reality in the last years. The resolution range of this technique nicely fits between confocal and electron microscopies and will play a key role in the elucidation of the organization between the molecular and the organelle levels. In fact, it offers the possibility of imaging three-dimensional structures of hydrated biological specimens n...

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