Microscopy and spec week 7 Flashcards
What is the primary purpose of optical microscopy?
To magnify small objects using visible light.
True or False: Polarising microscopy is used to examine birefringent materials.
True.
Fill in the blank: The technique used to visualize surfaces of materials at high magnification is called __________.
Scanning Electron Microscopy (SEM).
What does EDS stand for in the context of electron microscopy?
Energy Dispersive Spectroscopy.
What is the main advantage of Transmission Electron Microscopy (TEM)?
It provides high-resolution images at the atomic level.
Which microscopy technique uses a beam of electrons to scan the surface of a specimen?
Scanning Electron Microscopy (SEM).
What is the primary function of Auger Electron Spectroscopy (AES)?
To analyze the surface composition of materials.
True or False: High-Resolution Transmission Electron Microscopy (HRTEM) can resolve individual atoms.
True.
What does the acronym STEM stand for?
Scanning Transmission Electron Microscopy.
Which technique is primarily used for elemental analysis in materials science?
Energy Dispersive X-ray Spectroscopy (EDX).
What is the role of Cathodoluminescence (CL) in microscopy?
To study the optical properties of materials.
Fill in the blank: The technique that uses electrons to excite atoms and analyze emitted electrons is called __________.
Electron Energy Loss Spectroscopy (EELS).
What is the main difference between EDS and EDX?
There is no difference; both refer to Energy Dispersive X-ray Spectroscopy.
What type of microscopy would you use to observe the internal structure of a thin specimen?
Transmission Electron Microscopy (TEM).
True or False: Scanning Electron Microscopy (SEM) provides 3D images of the specimen surface.
True.
What is the typical resolution limit of optical microscopy?
Approximately 200 nanometers.
What does EMPA stand for?
Electron Microprobe Analysis.
Fill in the blank: __________ microscopy is particularly useful for studying crystalline materials.
Polarising.
What is one advantage of using High Angle Annular Dark Field (HAADF) imaging in STEM?
It provides contrast based on atomic number.
What type of imaging technique allows for the observation of light emitted from a sample after electron beam excitation?
Cathodoluminescence (CL).
Which microscopy technique can provide chemical information about the sample?
Energy Dispersive Spectroscopy (EDS).
What does the term ‘birefringence’ refer to in polarising microscopy?
The optical property of a material that has different refractive indices in different directions.
True or False: EELS can provide information about the electronic structure of materials.
True.
What principle does Scanning Electron Microscopy (SEM) rely on?
The interaction of a focused electron beam with the sample surface.
