Diffraction and Interference
Diffraction occurs for a. radio waves b. X-rays c. visible light d. electron beams e. all of the above
e.
What goes in and comes out for AES?
Electrons In
Electrons Out
What goes in and comes out for ESCA/XPS?
X-Rays In
Electrons Out
Electrical resistance in a wire depends on the wire's a. thickness b. conductivity c. length d. all of the above e. none of the above
d.
What goes in and comes out for SIMS?
Ions in
Ions out
Colors seen when gasoline forms a thin film on water are a demonstration of a. refraction b. diffraction c. dispersion d. interference e. polarization
d.
What is required before use in ESCA/XPS?
It requires Vacuum but not a conductive sample
What is the depth in the sample surface of the signal for ESCA/XPS?
From the first ~10 nm
What is Ohm's Law?
V=IR
Voltage (Volts) = Current (Amps) x Resistance (Ω)
What are the 2 types of SIMS detectors used?
Quadrupole (RF-DC) and Time of flight (TOF)
Magnification of a hologram can be accomplished if it is viewed with a light that has a a. shorter wavelength than the original light b. longer wavelength than the original light c. neither of the above
b.
What does the AES measure?
Electron energies of four specific electrons
What information is given in ESCA/XPS for low energy resolution use?
Provides qualitative and quantitative analysis information
What is the equation to calculate Resistivity?
Resistivity = (p x length) / (width x height)
What information is given in SIMS?
When monochromatic light shines through two closely spaced narrow slits and onto a screen some distance away, the pattern on the screen has a. no light in it b. two large bright spots c. alternating dark and light bands d. one large bright spot e. none of the above
c.
True or False:
- AES is more sensitive to lighter elements except Hydrogen.
True
What information is given in ESCA/XPS for high energy resolution use?
It provides information on the chemical state and bonding states
True or False:
- Electricity can be also be used in characterization technique such as;
Photons in Electricity out
Electricity in Photons out
True
What is a disadvantage in the SIMS technique?
Not a technique for quantitative results.
A thin film appears blue when illuminated with white light. The color being canceled by destructive interference is a. green b. red c. blue d. white e. none of the above
e.
What is the area size in the sample surface of the signal for ESCA/XPS?
Approximately ~10 nm - 100 nm
What is required before use in ESCA/XPS?
It requires Vacuum but not a conductive sample
What is Four-Wire/Kelvin Resistance measurement?
Four point measurement to improve accuracy of low-resistance measurements and/or for poor contacts.
What are the 3 advantages in the SIMS technique?
- High Sensitivity (ppm -ppb)
- Focused sensitivity to top sample surface
- Applicable to any solid