TY - JOUR
T1 - The effect of work function during electron spectroscopy measurements in Scanning Field-Emission Microscopy
AU - Bodik, Michal
AU - Walker, Christopher
AU - Demydenko, Maksym
AU - Michlmayr, Thomas
AU - Bähler, Thomas
AU - Ramsperger, Urs
AU - Thamm, Ann Katrin
AU - Tear, Steve
AU - Pratt, Andrew
AU - El-Gomati, Mohamed
AU - Pescia, Danilo
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/8
Y1 - 2022/8
N2 - Electron spectroscopy proves to be a handy tool in material science. Combination of electron spectroscopy and scanning probe microscopy is possible through Scanning Field Emission Microscopy (SFEM), where a metallic probe positioned close to the surface is used as an electron source. However, using this not too much technologically demanding technique, it looks like the compromise between the lateral resolution and spectroscopic clarity must be considered. Here, we demonstrate, using experimental and simulation data, that the spectroscopic information can be understood without the need to grossly deteriorate the potential spatial resolution of the microscope. We prepared a three-section sample with clean W(110), sub-monolayer Cs on W(110) and monolayer of Cs on W(110) on which electron energy loss spectra are obtained via Scanning Probe Energy Loss Spectroscopy (SPELS) measurements. To explain the detected spectra a new model describing SPELS measurements in a SFEM is developed which aids to uncover the origin of spectral features typically detected during experiments. Experimental and simulation data are in a mutual agreement and observed spectral features on different surfaces could be explained. This novel understanding of SPELS can solve the main issue previously related to this technique, and good spatial resolution can be accompanied by the understanding of the measured spectra.
AB - Electron spectroscopy proves to be a handy tool in material science. Combination of electron spectroscopy and scanning probe microscopy is possible through Scanning Field Emission Microscopy (SFEM), where a metallic probe positioned close to the surface is used as an electron source. However, using this not too much technologically demanding technique, it looks like the compromise between the lateral resolution and spectroscopic clarity must be considered. Here, we demonstrate, using experimental and simulation data, that the spectroscopic information can be understood without the need to grossly deteriorate the potential spatial resolution of the microscope. We prepared a three-section sample with clean W(110), sub-monolayer Cs on W(110) and monolayer of Cs on W(110) on which electron energy loss spectra are obtained via Scanning Probe Energy Loss Spectroscopy (SPELS) measurements. To explain the detected spectra a new model describing SPELS measurements in a SFEM is developed which aids to uncover the origin of spectral features typically detected during experiments. Experimental and simulation data are in a mutual agreement and observed spectral features on different surfaces could be explained. This novel understanding of SPELS can solve the main issue previously related to this technique, and good spatial resolution can be accompanied by the understanding of the measured spectra.
KW - Miniature electron energy analyser
KW - Scanning Field Emission Microscopy
KW - Scanning probe energy loss spectroscopy
KW - Scanning tunnelling microscopy
UR - http://www.scopus.com/inward/record.url?scp=85129749302&partnerID=8YFLogxK
U2 - 10.1016/j.ultramic.2022.113547
DO - 10.1016/j.ultramic.2022.113547
M3 - Article
C2 - 35545000
AN - SCOPUS:85129749302
SN - 0304-3991
VL - 238
JO - Ultramicroscopy
JF - Ultramicroscopy
M1 - 113547
ER -