The sticking coefficient of Pd on planar alumina supports
- H Poppa
- D Fargues
- et al.
- 1990
- Vacuum
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20 results for Helmut Poppa
A novel approach to image processing in spin-polarized electron microscopy
- T. VanZandt
- R. Browning
- et al.
- 1989
- Review of Scientific Instruments
Comparison with different existing techniques and suggestions for new methods
- H. Poppa
- 1989
- Ultramicroscopy
Auger and electron energy loss spectroscopies of small palladium particles supported on (111) oriented MgO films
- C.R. Henry
- H. Poppa
- 1989
- Zeitschrift für Physik D Atoms, Molecules and Clusters
Image processing enhancement of high-resolution TEM micrographs of nanometer-size metal particles
- P. Artal
- M. Avalos-Borja
- et al.
- 1989
- Ultramicroscopy
The determination of structure in small supported metal particles by scanning transmission electron diffraction
- H. Poppa
- R.D. Moorhead
- et al.
- 1989
- Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Effect of substrate preparation on the structure and chemisorption properties of Pd/MgO model catalyst
- C.R. Henry
- H. Poppa
- 1988
- Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
The use of RF-plasma reactions for in-situ transmission electron microscopy studies
- H. Poppa
- R.D. Moorhead
- 1987
- Ultramicroscopy
Growth and properties of particulate Fe films vapor deposited in UHV on planar alumina substrates
- H. Poppa
- C.A. Papageorgopoulos
- et al.
- 1986
- Zeitschrift für Physik D Atoms, Molecules and Clusters
The low-rate growth of particulate Fe on planar alumina supports
- Helmut Poppa
- C.A. Papageorgopoulos
- et al.
- 1986
- Ultramicroscopy