Lecture

Energy Dispersive X-ray Microanalysis

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

In course

MSE-636: Organic semiconductors

Description

This lecture introduces Energy Dispersive X-ray Microanalysis (EDX), a technique for elemental analysis. It explores the generation of X-rays, detection methods, quantification, and examples of its application. EDX relies on the emission of characteristic X-rays from a specimen when stimulated by charged particles. The unique atomic structure of each element allows for the identification of X-rays emitted. The lecture covers the efficiency of X-ray generation, X-ray fluorescence yield, and Moseley's Law. It also delves into the challenges of detection limits, spatial resolution, and correction methods for accurate quantification.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Instructor

Frank Nüesch

Teaching & PhD PhD Students Elodie Didier, Ceren Mitmit, João Pedro Ferreira Assunção, Vahid Charkhesht Past EPFL PhD Students Hui Zhang, Simon Johannes Dünki, Yee Song Ko, Lei Wang, Sandra Christina Jenatsch, Nicolas Alexandre Serge Leclaire, Donatas Gesevicius, Surendra Babu Anantharaman, Markus Regnat, Philip Horst Caspari, Patrik Schürch, David Reber, Karen Verena Strassel, Sina Abdolhosseinzadeh, Matthias Diethelm, Francis Owusu, Camilla Arietta Vael-Garn, Yeerlan Adeli, Wei-Hsu Hu, Cansu Zeytun Kara

Official source

Ontological neighbourhood

Chemistry

Physical chemistry: Spectroscopy

Related concepts (32)

X-ray spectroscopy

X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation. When an electron from the inner shell of an atom is excited by the energy of a photon, it moves to a higher energy level. When it returns to the low energy level, the energy which it previously gained by the excitation is emitted as a photon which has a wavelength that is characteristic for the element (there could be several characteristic wavelengths per element).

X-ray fluorescence

X-ray fluorescence (XRF) is the emission of characteristic "secondary" (or fluorescent) X-rays from a material that has been excited by being bombarded with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science, archaeology and art objects such as paintings.

X-ray

X-ray radiation, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 nanometers to 10 picometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3e16Hz to 3e19Hz) and energies in the range 124 keV to 145 eV, respectively. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.

Spectroscopy

Spectroscopy is the field of study that measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter as a function of the wavelength or frequency of the radiation. Matter waves and acoustic waves can also be considered forms of radiative energy, and recently gravitational waves have been associated with a spectral signature in the context of the Laser Interferometer Gravitational-Wave Observatory (LIGO).

Quantifier (logic)

In logic, a quantifier is an operator that specifies how many individuals in the domain of discourse satisfy an open formula. For instance, the universal quantifier in the first order formula expresses that everything in the domain satisfies the property denoted by . On the other hand, the existential quantifier in the formula expresses that there exists something in the domain which satisfies that property. A formula where a quantifier takes widest scope is called a quantified formula.

Related lectures (64)

Analytical Electron Microscopy: Spectroscopy and Microanalysis

Explores Analytical Electron Microscopy techniques for chemical analysis using EELS and EDX.

Generation of medical x-rays MOOC: Fundamentals of Biomedical Imaging: Ultrasounds, X-ray, positron emission tomography (PET) and applications

Explores the generation of medical x-rays, including Bremsstrahlung and characteristic x-rays.

Electron Microscopy: EDS

Explores Energy-Dispersive X-ray Spectroscopy (EDS) in electron microscopy, covering x-ray generation, detection, quantification, and mapping of elements in samples.

Enhancing and Shaping Radiation from High-Energy Particles with Nanophotonics

Delves into enhancing and tailoring radiation from high-energy particles using nanophotonic structures.

Beam-Matter Interactions: Emission Phenomena