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Fast DualEELS analysis of the distribution of Pd particles and their chemistry in zeolite

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Paolo Longo, Ph.D., Gatan, Inc.

The EELS analysis shows how Pd particles chemically interact with support.
Fast EELS analysis of metals in a blood cell attacked by the malaria parasite

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Paolo Longo, Ph.D., Gatan, Inc.

EELS data taken using a FEI F20 TEM/STEM microscope equipped with S-FEG emission gun and a fully loaded GIF Quantum® ER system.

Methods
Fast EELS analysis of AlNiCo based metal alloy for magnetic purposes

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Paolo Longo, Ph.D., Gatan, Inc. Sample courtesy of Dr. Li Zhou at Ames Lab, Iowa

EELS data taken using a FEI F20 TEM/STEM microscope equipped with S-FEG emission gun and a fully loaded GIF Quantum® ER system.

Methods

Voltage: 200 kV; data taken in STEM mode; EELS spectrum (300 – 2300 eV) exposure time: 8 ms; total exposure time:
EELS analysis of metal segregation across grain boundary in Yttria-stabilized Zirconia (YSZ) – investigating oxygen vacancies

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Paolo Longo, Ph.D., Gatan, Inc. Microscope and sample courtesy of Dr. Maria Varela at Oak Ridge National Lab, Oak Ridge, TN

EELS data were acquired using a probe-corrected NION Ultrastem 200 TEM/STEM microscope equipped with C-FEG emission gun and a fully loaded Enfinium™ ER system.

Methods
Phosphorus-containing macromolecular assemblies in the cell nuclei of drosophila larvae

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Data courtesy of Dr. Maria Aronova and Dr. Richard Leapman, National Institutes of Health, Bethesda, Maryland.

Image of phosphorus-containing macromolecular assemblies in the cell nuclei of drosophila larvae; dual-axis EFTEM tilt series acquired with a Tridiem energy filter from -66˚ to 66˚; for each axis phosphorus L-23 series (20 eV slit, pre-edge and post-edge) were collected; a jump-ratio series was c
Jointly acquired HAADF and MAADF signals

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The HAADF signal (left) contrast is easily interpreted in terms of mass thickness of the material while the diffraction contrast MAADF signal (right) reveals highly detailed structural changes in the material. The optimized geometry makes this possible.
Colorized EELS elemental map

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This work was performed in collaboration with Dr. Phil Rice and Dr. Teya Topuria of IBM Almaden Research Center in San Jose, CA who provided expert assistance as well as the TEM specimen and access to their microscope facilities.

Colorized EELS elemental map of Ti L2,3-edges at 456 eV (green), Mn L2,3-edges at 640 eV (blue), La M4,5-edges at 832 eV (purple) and Sr L2,3-edges at 1940 eV (red).

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Resources

Fast DualEELS analysis of the distribution of Pd particles and their chemistry in zeolite

Fast EELS analysis of metals in a blood cell attacked by the malaria parasite

Fast EELS analysis of AlNiCo based metal alloy for magnetic purposes

EELS analysis of metal segregation across grain boundary in Yttria-stabilized Zirconia (YSZ) – investigating oxygen vacancies

Phosphorus-containing macromolecular assemblies in the cell nuclei of drosophila larvae

Jointly acquired HAADF and MAADF signals

Colorized EELS elemental map

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