Handy waveguide TXRF spectrometer for nanogram sensitivity

2008 ◽  
Vol 23 (2) ◽  
pp. 146-149 ◽  
Author(s):  
Shinsuke Kunimura ◽  
Jun Kawai
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Rare Earth Elements ◽  
Beam Size ◽  
X Ray ◽  
Metal Elements ◽  
Transition Metal Elements

A specimen containing nanograms of sulfur, calcium, and 3d transition metal elements was measured by incident X-ray beams of various sizes restricted by a waveguide placed in a portable TXRF spectrometer. The signal to background ratios of spectra decreased with an increase in incident X-ray beam size. The portable spectrometer was also applied to rainwater and a specimen containing antimony and rare earth elements. Nanograms of elements in these specimens were detected by K-line or L-line excitation.

scholarly journals Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1150 ◽  
Author(s):  
Sugata Barui ◽  
Roberto Gerbaldo ◽  
Nadia Garino ◽  
Rosaria Brescia ◽  
Francesco Laviano ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Rare Earth ◽  
Oleic Acid ◽  
Magnetic Resonance ◽  
Transition Metal ◽  
Rare Earth Elements ◽  
Resonance Imaging ◽  
Metal Elements ◽  
Doped Zno ◽  
Transition Metal Elements

Zinc oxide nanocrystals (ZnO-NCs) doped with transition metal elements or rare earth elements can be probed for magnetic resonance imaging to be used as a molecular imaging technique for accurate diagnosis of various diseases. Herein, we use Mn as a candidate of transition metal elements and Gd as a presenter of rare earth elements. We report an easy and fast coprecipitation method exploiting oleic acid to synthesize spherical-shaped, small-sized doped ZnO-NCs. We show the improved colloidal stability of oleate-stabilized doped ZnO-NCs compared to the doped ZnO-NCs synthesized by conventional sol–gel synthesis method, i.e., without a stabilizing agent, especially for the Mn dopant. We also analyze their structural, morphological, optical, and magnetic properties. We are able to characterize the persistence of the crystalline properties (wurtzite structure) of ZnO in the doped structure and exclude the formation of undesired oxides by doping elements. Importantly, we determine the room-temperature ferromagnetism of the doped ZnO-NCs. This oleate-stabilized coprecipitation method can be subjected as a standard procedure to synthesize doped and also co-doped ZnO-NCs with any transition metal elements or rare earth elements. In the future, oleate-stabilized Gd/Mn-doped ZnO-NCs can be exploited as magnetic resonance imaging (MRI) contrast agents and possibly increase the signal intensity on T1-weighted images or reduce the signal intensity on T2-weighted images.

scholarly journals Soft X-ray Emission Spectroscopy on Chemical States of 3D-Transition Metal Elements with SEM

2015 ◽  
Vol 21 (S3) ◽  
pp. 2355-2356
Author(s):  
M. Terauchi ◽  
H. Takahashi ◽  
T. Murano ◽  
T. Imazono ◽  
M. Koike ◽  
...  
Keyword(s):  
Transition Metal ◽  
Emission Spectroscopy ◽  
X Ray ◽  
Metal Elements ◽  
Chemical States ◽  
Transition Metal Elements

Selected multiferroic perovskite oxides containing rare earth and transition metal elements

2014 ◽  
Vol 59 (36) ◽  
pp. 5170-5179 ◽  
Author(s):  
Shunbo Hu ◽  
Lei Chen ◽  
Yabei Wu ◽  
Liming Yu ◽  
Xinluo Zhao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Perovskite Oxides ◽  
Metal Elements ◽  
Transition Metal Elements

scholarly journals X-ray Diffraction Analysis of Ti-18 mol%Nb Based Shape Memory Alloys Containing 3d Transition Metal Elements

2006 ◽  
Vol 47 (4) ◽  
pp. 1209-1213 ◽  
Author(s):  
Yosuke Horiuchi ◽  
Tomonari Inamura ◽  
Hee Young Kim ◽  
Syuichi Miyazaki ◽  
Kenji Wakashima ◽  
...  
Keyword(s):  
Transition Metal ◽  
Shape Memory Alloys ◽  
Diffraction Analysis ◽  
Shape Memory ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Elements ◽  
Transition Metal Elements
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