Academic Journal
Quantification and optimization of ADF-STEM image contrast for beam-sensitive materials
| العنوان: | Quantification and optimization of ADF-STEM image contrast for beam-sensitive materials |
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| المؤلفون: | Gnanasekaran, Karthikeyan, de With, Gijsbertus, Friedrich, Heiner |
| المصدر: | Gnanasekaran , K , de With , G & Friedrich , H 2018 , ' Quantification and optimization of ADF-STEM image contrast for beam-sensitive materials ' , Royal Society Open Science , vol. 5 , no. 5 , 171838 . https://doi.org/10.1098/rsos.171838 |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Beam-sensitive materials, Electron dose, Image contrast, Low-contrast materials, Monte Carlo simulations, Scanning transmission electron microscopy |
| الوصف: | Many functional materials are difficult to analyse by scanning transmission electron microscopy (STEM) on account of their beam sensitivity and low contrast between different phases. The problem becomes even more severe when thick specimens need to be investigated, a situation that is common for materials that are ordered from the nanometre to micrometre length scales or when performing dynamic experiments in a TEM liquid cell. Here we report a method to optimize annular dark-field (ADF) STEM imaging conditions and detector geometries for a thick and beam-sensitive low-contrast specimen using the example of a carbon nanotube/polymer nanocomposite. We carried out Monte Carlo simulations as well as quantitative ADF-STEM imaging experiments to predict and verify optimum contrast conditions. The presentedmethod is general, can be easily adapted to other beam-sensitive and/or low-contrast materials, as shown for a polymer vesicle within a TEM liquid cell, and can act as an expert guide on whether an experiment is feasible and to determine the best imaging conditions. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://research.tue.nl/en/publications/e07dc321-de9a-40c2-a2fa-d953b13d5a27 |
| DOI: | 10.1098/rsos.171838 |
| الاتاحة: | https://research.tue.nl/en/publications/e07dc321-de9a-40c2-a2fa-d953b13d5a27 https://doi.org/10.1098/rsos.171838 https://pure.tue.nl/ws/files/98100749/171838.full.pdf http://www.scopus.com/inward/record.url?scp=85046543161&partnerID=8YFLogxK |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.12538F89 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1098/rsos.171838 |
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