guest ::
| Home > Conference materials > Papers > Determination of thickness refinement using STEM detector segments |
Original title:
Determination of thickness refinement using STEM detector segments
Authors: Skoupý, Radim ; Krzyžánek, Vladislav
Document type: Papers
Conference/Event: Anniversary International Conference on Nanomaterials - Research and Application (NANOCON) /10./, Brno (CZ), 20181017
Year: 2019
Language: eng
Abstract: Quantitative STEM imaging together with Monte Carlo simulations of electron scattering in solids can bring interesting results about properties of many thin samples. It is possible to determine thickness of a sample, to calculate mass of particles and measure mass per length/area. Appropriate calibration is one of the crucial parts of the method. Even a small error or inaccuracy in detector response to electron beam either blanked or full brings significant error into thickness determination. This problem can be overcome by parallel STEM imaging in more segments of the detector. Comparing more segments gives a possibility to use a signal from different segments for different thicknesses of a sample. Accuracy of individual parts of the detector depends on the captured signal quantity. It is desirable to use such a STEM detector segment that provides the greatest signal change to a unit of thickness. To demonstrate the usage, we used a sample of Latex nanospheres placed on thin carbon lacey film, diameter of the nanospheres was around 600 nm in order to compare the results from different detector segments. Thanks to the known thickness of the sample (calculated from its geometrical shape), it is possible to estimate the optimal acquisition settings and post processing steps with the known and the true state of the sample.
Keywords: detector segments; electron-microscopy; Monte Carlo simulation; Quantitative STEM; thickness determination
Project no.: GA17-15451S (CEP), LO1212 (CEP), ED0017/01/01
Funding provider: GA ČR, GA MŠk, GA MŠk
Host item entry: 10th Anniversary International Conference on Nanomaterials - Research and Application (NANOCON 2018), ISBN 978-80-87294-89-5
Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0309122
Permalink: http://www.nusl.cz/ntk/nusl-432875
The record appears in these collections:
Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers
Authors: Skoupý, Radim ; Krzyžánek, Vladislav
Document type: Papers
Conference/Event: Anniversary International Conference on Nanomaterials - Research and Application (NANOCON) /10./, Brno (CZ), 20181017
Year: 2019
Language: eng
Abstract: Quantitative STEM imaging together with Monte Carlo simulations of electron scattering in solids can bring interesting results about properties of many thin samples. It is possible to determine thickness of a sample, to calculate mass of particles and measure mass per length/area. Appropriate calibration is one of the crucial parts of the method. Even a small error or inaccuracy in detector response to electron beam either blanked or full brings significant error into thickness determination. This problem can be overcome by parallel STEM imaging in more segments of the detector. Comparing more segments gives a possibility to use a signal from different segments for different thicknesses of a sample. Accuracy of individual parts of the detector depends on the captured signal quantity. It is desirable to use such a STEM detector segment that provides the greatest signal change to a unit of thickness. To demonstrate the usage, we used a sample of Latex nanospheres placed on thin carbon lacey film, diameter of the nanospheres was around 600 nm in order to compare the results from different detector segments. Thanks to the known thickness of the sample (calculated from its geometrical shape), it is possible to estimate the optimal acquisition settings and post processing steps with the known and the true state of the sample.
Keywords: detector segments; electron-microscopy; Monte Carlo simulation; Quantitative STEM; thickness determination
Project no.: GA17-15451S (CEP), LO1212 (CEP), ED0017/01/01
Funding provider: GA ČR, GA MŠk, GA MŠk
Host item entry: 10th Anniversary International Conference on Nanomaterials - Research and Application (NANOCON 2018), ISBN 978-80-87294-89-5
Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0309122
Permalink: http://www.nusl.cz/ntk/nusl-432875
The record appears in these collections:
Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers
Record created 2021-02-24, last modified 2021-11-24