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Group questions for final Flashcards

(46 cards)

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1
Q

List 3 uses of Electron Back scatter Diffraction (EBSD)

A
  • grain size
  • crystal orientation
  • global and local texture
  • substructure analysis
  • strain analysis
  • phase identification
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2
Q

What type of materials will not produce patters forElectron Back scatter Diffraction (EBSD)

A

Amorphous materials

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3
Q

List 2 properties that Electron Back scatter diffraction (EBSD) software record during analysis

A
  • The phase
  • XY position
  • orientation
  • goodness of fit
  • pattern quality
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4
Q

Phase distribution map reveals the presence of hard and brittle inter-metallic phases called?

A
  • Sigma

- Chi

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5
Q

Who was the scientist that created the glow discharge tube in 1968?

A

Werner Grimm

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6
Q

What type of analysis is the glow discharge optical emission spectroscopy (GDOES) most useful for?

A

Determining elemental composition, layer thickness, and layer structure

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7
Q

What types of materials can the Glow discharge analyze?

A

Metal alloy coatings, semiconductors, polymer coatings, and glass

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8
Q

Which type of gas does the glow discharge utilize when testing?

A

argon

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9
Q

What are the lasers used in photo-thermal spectroscopy

A

There are 2, the pump laser and the probe laser

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10
Q

Name 2 applications of Photo-thermal spectroscopy

A
  • Thermal blooming of homogeneous gases and liquids
  • analysis of layered materials
  • detection of single nanoparticles
  • measure thermal properties of solids and layered materials
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11
Q

Which two types of interfering fields are collected on fast photodiodes in photothermal microscopy?

A

Backward and forward

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12
Q

What does the probing beam do in photothermal microscopy?

A

detects and measures the local refractive index changes

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13
Q

What allows the sample to be moved continuously through the laser?

A

A Feedback Loop

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14
Q

What is the benefit of single particle tracking?

A

Live tracking of molecule

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15
Q

What are two examples of applications of Ion Scattering Spectroscopy?

A

a. Microelectronics
b. Study of crystal growth
c. Study of oxidation
d. Sample characterization

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16
Q

How are scattered ions measured in order to determine the element in the sample

A

Kinetic energy of the ion

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17
Q

In Ion Scattering Spectroscopy, what level of vacuum is the sample held at?

A

ultra high vacuum

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18
Q

What type of atoms create the larger peaks in a spectrum when using Ion Scattering Spectroscopy?

A

Larger atoms

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19
Q

XRF works by removing what from the inner orbital shell of an atom

20
Q

Name 3 applications for XRF

Study These Flashcards
A

Geology, medicine, environmental analysis, mining and ore processing

21
Q

When was XRF first used

Study These Flashcards
A

1928 by Glocker and Schreiber

22
Q

Two categories of XRF

Study These Flashcards
A

Energy Dispersive and Wavelength Dispersive

23
Q

What is the purpose for having the field reduction factor for Field Ion Microscopy?

Study These Flashcards
A

to take into account the geometry and electrostatic environment of each tip

24
Q

Why must some imaging gas be present in Field Ion Microscopy?

Study These Flashcards
A

So that there is a medium to be ionized

25
What defects can be seen using Field Ion Microscopy?
vacancies, dislocations and grain boundaries
26
For Analyzing alloys using Field Ion Microscopy what do the differences in colors represent?
Different phases in the sample.
27
What is a particle accelerator called in small-angle X-ray scattering
Synchroton
28
How many dimensions is the initial data collected in for small angle x-ray scattering
2 dimensions
29
What are the two main categories of SAXS instruments?
Point-collimation and line-collimation
30
What is the main complication in the process of SAXS?
Separating the main beam from the weaker scattered x-rays
31
What is the other name for particle-induced x-ray emission?
Proton-induced x-ray emission
32
How is the heat from a proton beam displaced? (particle induced xray)
By running a helium purge
33
What form is data given? (particle induced xray)
Peaks
34
Name two applications of PIXS (particle induced x ray)
- Art - biology - materials science - environmental pollution - bones - ancient texts - ancient tools - paintings - pottery - jewels
35
when was the effect of auger electron spectroscopy observed?
Mid 1920's
36
Name two main uses of AES
- Analyze grain boundaries in metals and ceramics - Study film growth and surface-chemical composition - Quality control surface analyses in integrated circuits (fast collection times), - Areas that require high spatial resolution - Depth profiling
37
What are the two types of interactions?
Elastic and Inelastic scattering
38
The Auger energies fall between what two electron energies?
Secondary and backscattered
39
Who were the two scientists that Ernest Rutherford supervised and what where they studying?
Hans Geiger and Ernest Marsden, they were studying the scattering of alpha particles through metal foils
40
What is the difference between Rutherford’s model of the atom and Rutherford-Bohr model?
The Rutherford model did not consider the different electron shells. Niels Bohr improved the Rutherford model through quantum mechanics to show there were different electron shells
41
What are the three components for the apparatus?
An ion source (usually He¬+), a linear particle accelerator, and a detector
42
What are two applications for using RBS?
Composition of a sample, contamination levels, depth of an element for multilayered samples
43
What are the two main types of Confocal microscopes?
laser scanning microscopy (CLSM) and tandem scanning microscopes (CTSM)
44
What is the main difference between conventional fluorescence microscopes and Confocal microscopes?
Uses point illumination and pinhole to eliminate out-of-focus signal
45
What are the sensitive detectors that can be used in the confocal microscope
Photomultiplier tube or avalanche photodiode
46
What are 3 applications for the confocal microscope?
- Stem cell research -Photobleaching studies - Fluorescence resonance energy transfer (FRET) - Limetime imaging - Multiphoton microscopy - DNA hybridization - Membrane and ion probes - Bioluminescent proteins - Epitope tagging

Microscopy (7 decks)

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