Fluorescence techniques and sensors

6 dezembro 2019, 11:00 • Carlos Baleizão

Fluorescence techniques and sensors

Electron Microscopy Lab

4 dezembro 2019, 12:00 • Amélia Almeida

Laboratory class on materials characterization by electron microscopy: SEM (SE and BSE modes), TEM (Bright field, dark field, electron diffraction), EDS microanalysis and EBSD.

Electron Microscopy 2

29 novembro 2019, 11:00 • Amélia Almeida

Transmission electron microscopy. Constitution and working principles. Contrast mechanisms in TEM (diffraction, mass and phase contrast), TEM imaging modes (bright field, dark field) and examples. Electron diffraction (spot and ring patterns). Advantages and disadvantages of TEM.

EDS microanalysis. Spectrum analysis and element distribution maps. EBSD principles and material analysis tools. Orientation imaging maps. Specimens preparation for SEM (methods for metals, ceramics, polymers and biological materials). Conductive coating methods. Sample preparation for EBSD. TEM sample preparation methods.

Electron microscopy 1

27 novembro 2019, 12:00 • Amélia Almeida

Electron microscopy. Introduction and fundamentals. Scanning electron microscopy. Magnification and resolution. Electrons vs light. Wavelength and acceleration voltage. Electron microscopes: constitution and main components. SEM working principles. Beam-specimen interactions. Image formation and detectors. SE and BSE image characteristics. Examples of analysis of different materials. Environmental SEM. Advantages and disadvantages of SEM.

Atomic Spectrometry for metal ion determination

22 novembro 2019, 11:00 • Margarida Maria Portela Correia dos Santos Romão

Visit to LAIST

Atomic Mass Spectrometry and ion sources; ICP-MS

iComparison of the atomic spectrometries for metal ion determinations