scholarly journals Visualizing electronic interactions between iron and carbon by X-ray chemical imaging and spectroscopy

2015 ◽  
Vol 6 (5) ◽  
pp. 3262-3267 ◽  
Author(s):  
Xiaoqi Chen ◽  
Jianping Xiao ◽  
Jian Wang ◽  
Dehui Deng ◽  
Yongfeng Hu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Chemical Imaging ◽  
Electronic Interaction ◽  
Iron Particles ◽  
Electronic Interactions ◽  
X Ray ◽  
Scanning Transmission ◽  
Imaging And Spectroscopy

Pod-like carbon nanotube with encapsulated iron particles (Pod-Fe) was used as a well-defined model to study the electronic interaction between carbon shells and the iron particles by scanning transmission X-ray microscopy (STXM).

scholarly journals Nanoscale chemical imaging of a working catalyst by scanning transmission X-ray microscopy

Nature ◽  
2008 ◽  
Vol 456 (7219) ◽  
pp. 222-225 ◽  
Author(s):  
Emiel de Smit ◽  
Ingmar Swart ◽  
J. Fredrik Creemer ◽  
Gerard H. Hoveling ◽  
Mary K. Gilles ◽  
...  
Keyword(s):  
Chemical Imaging ◽  
X Ray ◽  
Scanning Transmission ◽  
Nanoscale Chemical Imaging

Local structure of titania decorated double-walled carbon nanotube characterized by scanning transmission X-ray microscopy

2012 ◽  
Vol 136 (17) ◽  
pp. 174701 ◽  
Author(s):  
Hongbo Zhang ◽  
Jian Wang ◽  
Xiulian Pan ◽  
Yongfeng Hu ◽  
Xinhe Bao
Keyword(s):  
Carbon Nanotube ◽  
Local Structure ◽  
X Ray ◽  
Scanning Transmission

Origin of luminescence from ZnO/CdS core/shell nanowire arrays

Nanoscale ◽  
2014 ◽  
Vol 6 (16) ◽  
pp. 9783-9790 ◽  
Author(s):  
Zhiqiang Wang ◽  
Jian Wang ◽  
Tsun-Kong Sham ◽  
Shaoguang Yang
Keyword(s):  
Optical Properties ◽  
Chemical Imaging ◽  
Nanowire Arrays ◽  
Nano Composites ◽  
Core Shell ◽  
Edge Structure ◽  
X Ray ◽  
Optical Luminescence ◽  
Scanning Transmission ◽  
X Ray Absorption

Chemical imaging, electronic structure and optical properties of ZnO/CdS nano-composites have been investigated using scanning transmission X-ray microscopy (STXM), X-ray absorption near-edge structure (XANES) and X-ray excited optical luminescence (XEOL) spectroscopy.

3-d chemical imaging using angle-scan nanotomography in a soft X-ray scanning transmission X-ray microscope

2008 ◽  
Vol 92 (3) ◽  
pp. 447-452 ◽  
Author(s):  
A. P. Hitchcock ◽  
G. A. Johansson ◽  
G. E. Mitchell ◽  
M. H. Keefe ◽  
T. Tyliszcak
Keyword(s):  
Chemical Imaging ◽  
X Ray ◽  
Scanning Transmission

scholarly journals Chemically selective imaging and spectroscopy with Scanning Transmission X-ray Microscopy

2013 ◽  
Vol 19 (S2) ◽  
pp. 2038-2039 ◽  
Author(s):  
A. Hitchcock ◽  
M. Obst ◽  
T. Tyliszczak ◽  
S. Kalirai ◽  
D. Bazylinski
Keyword(s):  
X Ray ◽  
Scanning Transmission ◽  
Imaging And Spectroscopy ◽  
Chemically Selective

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

scholarly journals Optimization of Three-Dimensional (3D) Chemical Imaging by Soft X-Ray Spectro-Tomography Using a Compressed Sensing Algorithm

2017 ◽  
Vol 23 (5) ◽  
pp. 951-966 ◽  
Author(s):  
Juan Wu ◽  
Mirna Lerotic ◽  
Sean Collins ◽  
Rowan Leary ◽  
Zineb Saghi ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Iterative Reconstruction ◽  
Three Dimensional ◽  
Chemical Imaging ◽  
Reconstruction Technique ◽  
Back Projection ◽  
X Ray ◽  
Reconstruction Methods ◽  
Scanning Transmission ◽  
X Ray Absorption

AbstractSoft X-ray spectro-tomography provides three-dimensional (3D) chemical mapping based on natural X-ray absorption properties. Since radiation damage is intrinsic to X-ray absorption, it is important to find ways to maximize signal within a given dose. For tomography, using the smallest number of tilt series images that gives a faithful reconstruction is one such method. Compressed sensing (CS) methods have relatively recently been applied to tomographic reconstruction algorithms, providing faithful 3D reconstructions with a much smaller number of projection images than when conventional reconstruction methods are used. Here, CS is applied in the context of scanning transmission X-ray microscopy tomography. Reconstructions by weighted back-projection, the simultaneous iterative reconstruction technique, and CS are compared. The effects of varying tilt angle increment and angular range for the tomographic reconstructions are examined. Optimization of the regularization parameter in the CS reconstruction is explored and discussed. The comparisons show that CS can provide improved reconstruction fidelity relative to weighted back-projection and simultaneous iterative reconstruction techniques, with increasingly pronounced advantages as the angular sampling is reduced. In particular, missing wedge artifacts are significantly reduced and there is enhanced recovery of sharp edges. Examples of using CS for low-dose scanning transmission X-ray microscopy spectroscopic tomography are presented.

Soft X-ray microscopy with a cryo scanning transmission X-ray microscope: I. Instrumentation, imaging and spectroscopy

2000 ◽  
Vol 197 (1) ◽  
pp. 68-79 ◽  
Author(s):  
Maser ◽  
Osanna ◽  
Wang ◽  
Jacobsen ◽  
Kirz ◽  
...  
Keyword(s):  
X Ray ◽  
Scanning Transmission ◽  
Imaging And Spectroscopy

scholarly journals Chemical Imaging by Soft X-ray Scanning Transmission X-ray Microscopy

2006 ◽  
Vol 12 (S02) ◽  
pp. 1396-1397
Author(s):  
AP Hitchcock ◽  
D Hernández-Cruz ◽  
JJ Dynes ◽  
M-E Rousseau ◽  
M Pézolet
Keyword(s):  
Chemical Imaging ◽  
X Ray ◽  
Scanning Transmission

Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

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