TAILIEUCHUNG - Microscopy and Surface Analysis 1

Microscopic and imaging techniques: – Optical microscopy – Confocal microscopy – Electron microscopy (SEM and TEM, related methods) – Scanning probe microscopy (STM and AFM, related methods) Surface spectrometric techniques: – X-ray fluorescence (from electron microscopy) – Auger electron spectrometry – X-ray photoelectron spectrometry (XPS/UPS/ESCA) | a W VILLANOVA UNIVERSITY Microscopy and Surface Analysis 1 Lecture Date March 11th 2008 Reading Assignments for Microscopy and Surface Analysis Skoog Holler and Nieman Chapter 21 Surface Characterization by Spectroscopy and Microscopy Hand-out Review Article R. J. Hamers Scanned Probe Microscopies in Chemistry J. Phys. Chem. 1996 100 13103-13120. 1 Microscopy and Surface Analysis Microscopic and imaging techniques - Optical microscopy - Confocal microscopy - Electron microscopy SEM and TEM related methods - Scanning probe microscopy STM and AFM related methods Surface spectrometric techniques - X-ray fluorescence from electron microscopy - Auger electron spectrometry - X-ray photoelectron spectrometry XPS UPS ESCA - Other techniques Secondary-ion mass spectrometry SIMS Ion-scattering spectrometry ISS IR Raman methods Why Study Surfaces Surface - the interface between two of matter s common phases - Solid-gas we will primarily focus on this - Solid-liquid - Solid-solid - Liquid-gas - Liquid-liquid The majority of present studies are applied to this type of system and the techniques available are extremely powerful The properties of surfaces often control chemical reactions 2 Microscopy Why is microscopy useful What can it tell the analytical chemist - Sample topography - Structural stress strain - Electromagnetic properties - Chemical composition Plus - a range of spectroscopic techniques from IR to X-ray wavelengths energies have been combined with microscopy to create some of the most powerful analytical tools available. Imaging Resolution and Magnification Some typical values for microscopic methods Method Resolution Magnification x Human Eye mm - Optical Microscopy um 1200 Electron Microscopy 30-50 Â 10-75 000 Probe Microscopy 1 Â 500 000

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• technology petrochemical
• oil and gas transport
• geological drilling
• oil lubrication
• Electroanalytical Chemistry
• ohmic Potential
• oil refining processes
• petrochemical organic
• petrochemical
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• Oil and Lubricants
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