Electron-beam-induced reduction of Fe3+ in iron phosphate dihydrate, ferrihydrite, haemosiderin and ferritin as revealed by electron energy-loss spectroscopy

2010 ◽  
Vol 110 (8) ◽  
pp. 1020-1032 ◽  
Author(s):  
Ying-Hsi Pan ◽  
Gareth Vaughan ◽  
Rik Brydson ◽  
Andrew Bleloch ◽  
Mhairi Gass ◽  
...  
2016 ◽  
Vol 169 ◽  
pp. 98-106 ◽  
Author(s):  
Magnus Nord ◽  
Per Erik Vullum ◽  
Ingrid Hallsteinsen ◽  
Thomas Tybell ◽  
Randi Holmestad

2014 ◽  
Vol 105 (5) ◽  
pp. 053117 ◽  
Author(s):  
Ll. Yedra ◽  
P. Torruella ◽  
A. Eljarrat ◽  
A. D. Darbal ◽  
J. K. Weiss ◽  
...  

Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.


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