Nonuniform functional group distribution of carbon nanotubes studied by energy dispersive X-ray spectrometry imaging in SEM

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21487-21492 ◽  
Author(s):  
Hideaki Nakajima ◽  
Takahiro Morimoto ◽  
Ying Zhou ◽  
Kazufumi Kobashi ◽  
Seisuke Ata ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Spatial Resolution ◽  
Functional Group ◽  
High Spatial Resolution ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
X Ray ◽  
Group Distribution

Light elemental mapping with a high spatial resolution of <10 nm is successfully conducted by the advanced SEM–EDS technique.

Development of a High Spatial Resolution X-Ray Fluorescence Element Mapping Spectrometer and its Application to Quantitative Analysis of Biological Systems

1991 ◽  
Vol 35 (B) ◽  
pp. 1285-1287
Author(s):  
Natsuo Fukumoto ◽  
Yoshinori Kobayashi ◽  
Masayasu Kurahashi ◽  
Akira Kawase
Keyword(s):  
Quantitative Analysis ◽  
Spatial Resolution ◽  
Biological Samples ◽  
High Spatial Resolution ◽  
Biological Systems ◽  
Energy Dispersive ◽  
X Ray ◽  
Available Energy ◽  
Element Mapping ◽  
Better Than

We developed an X-ray fluorescence element mapping spectrometer (XEMS) based on commercially available energy dispersive XRF equipment several years ago. Using XEMS, we found that this technique is applicable to realtime observation of the elemental distributions in living biological samples. This kind of observation is almost impossible by conventional techniques such as EPMA, PIXE etc. But the spatial resolution of the previous system was about 200pm, Inferior by almost two orders to that of EPMA for example. So we developed a new spectrometer with an improved resolution of better than 20um and almost the same sensitivity.

scholarly journals High-Spatial-Resolution Bone Densitometry with Dual-Energy X-ray Absorptiometric Region-free Analysis

Radiology ◽  
2015 ◽  
Vol 275 (1) ◽  
pp. 310-310 ◽  
Author(s):  
Richard M. Morris ◽  
Lang Yang ◽  
Miguel A. Martín-Fernández ◽  
Jose M. Pozo ◽  
Alejandro F. Frangi ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Bone Densitometry ◽  
High Spatial Resolution ◽  
Dual Energy ◽  
X Ray

scholarly journals ZnWO4 Nanoparticle Scintillators for High Resolution X-ray Imaging

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1721
Author(s):  
Heon Yong Jeong ◽  
Hyung San Lim ◽  
Ju Hyuk Lee ◽  
Jun Heo ◽  
Hyun Nam Kim ◽  
...  
Keyword(s):  
Particle Size ◽  
Zinc Oxide ◽  
High Resolution ◽  
Tungsten Oxide ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
X Ray ◽  
X Ray Imaging ◽  
Average Size ◽  
And Tungsten

The effect of scintillator particle size on high-resolution X-ray imaging was studied using zinc tungstate (ZnWO4) particles. The ZnWO4 particles were fabricated through a solid-state reaction between zinc oxide and tungsten oxide at various temperatures, producing particles with average sizes of 176.4 nm, 626.7 nm, and 2.127 μm; the zinc oxide and tungsten oxide were created using anodization. The spatial resolutions of high-resolution X-ray images, obtained from utilizing the fabricated particles, were determined: particles with the average size of 176.4 nm produced the highest spatial resolution. The results demonstrate that high spatial resolution can be obtained from ZnWO4 nanoparticle scintillators that minimize optical diffusion by having a particle size that is smaller than the emission wavelength.

Phase composition depth profiles using spatially resolved energy dispersive X-ray diffraction

2004 ◽  
Vol 37 (6) ◽  
pp. 967-976 ◽  
Author(s):  
Andrew C. Jupe ◽  
Stuart R. Stock ◽  
Peter L. Lee ◽  
Nikhila N. Naik ◽  
Kimberly E. Kurtis ◽  
...  
Keyword(s):  
Phase Composition ◽  
Spatial Resolution ◽  
Zinc Coating ◽  
High Energy ◽  
Sulfate Attack ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spatially Resolved ◽  
Composition Profiles

Spatially resolved energy dispersive X-ray diffraction, using high-energy synchrotron radiation (∼35–80 keV), was used nondestructively to obtain phase composition profiles along the radii of cylindrical cement paste samples to characterize the progress of the chemical changes associated with sulfate attack on the cement. Phase distributions were acquired to depths of ∼4 mm below the specimen surface with sufficient spatial resolution to discern features less than 200 µm thick. The experimental and data analysis methods employed to obtain quantitative composition profiles are described. The spatial resolution that could be achieved is illustrated using data obtained from copper cylinders with a thin zinc coating. The measurements demonstrate that this approach is useful for nondestructively visualizing the sometimes complex transformations that take place during sulfate attack on cement-based materials. These transformations can be spatially related to microstructure as seen by computed microtomography.

APD-based x-ray imaging telescope using Fresnel zone plates for extremely high spatial resolution

2005 ◽  
Author(s):  
Michael R. Squillante ◽  
Richard A. Myers ◽  
Mitchell Woodring ◽  
James F. Christian ◽  
Frank Robertson ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
X Ray ◽  
Zone Plates ◽  
X Ray Imaging ◽  
Imaging Telescope
Sign in / Sign up

Export Citation Format

Share Document