Correlative cryo-qSTEM-CL imaging in a SEM

0495552 - ÚPT 2019 AU eng A - Abstract
Skoupý, Radim - Krzyžánek, Vladislav
Correlative cryo-qSTEM-CL imaging in a SEM.
19th International Microscopy Congress (IMC19). Book of Abstracts.. Sydney: LMA, 2018.
[International Microscopy Congress (IMC19) /19./. 09.09.2018-14.09.2018, Sydney]
R&D Projects: GA ČR GA17-15451S; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : correlative imaging * quantitative imaging * Monte Carlo
OECD category: Nano-materials (production and properties)

Nowadays, a correlative microscopy of several signals is one of the main topics in the electron microscopy field. In some studies, a localization, distribution and density of light emitting labels or particles in a sample is important. Unfortunately, not all light emitting structures are possible to be imaged at room temperature. Very fine particles like quantum dots with diameter in terms of nm are recognizable only at very low temperatures and with appropriate anticontamination shielding, because a contamination layer of hydrocarbon deposits can disturb whole measuring at the first electron beam scan. Qualitative imaging can be changed to quantitative by using Monte Carlo (MC) simulations of samples, with known composition and density, which can bring a new dimension to thin samples imaging by STEM (Scanning Transmission Electron Microscopy). Recalculation of calibrated images via MC gives the information about the local thickness of the sample and total mass of the imaged particle with high precision (approach published in was used). This information can be compared with local cathodoluminescence (CL) activity or quantitative imaging in backscattered electrons.
Permanent Link: http://hdl.handle.net/11104/0288507