Intro Spectroscopy
5th Edition
ISBN: 9781305221796
Author: PAVIA
Publisher: Cengage
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Choose the correct answer :
1. Nanomaterials differ from bulk
materials in their
(a) Electrical properties.
(d) All the options.
(c) Optical properties.
(b) Magnetic properties.
2. Quantum dots are considers as:
(a) 2 D structures.
(b) 1 D structures. (c) 0 D structures. (d) 3
D structures.
3. Fibers or particles embedded in matrix
of another material are the example as:
(a) an alloy. (b) composite material. (C)
crystal.
(d) nanotubes.
4. What is the aspect ratio?
(a) length to diameter ratio
(c) diameter to length ratio.
(b) length to depth ratio.
(d) depth to length ratio.
5. Polymer chain immobilization at
particle surface is controlled by :
(a) nanocomposite.
(d) electrospining.
(c) electro-deposition.
(b) electronic and atomic level structure.
The carbonyl stretching motion appears in the infrared spectrum at a position of approximately1700 cm-1. How many times per second does a carbonyl stretch and compress?
b- Explain how the materials properties depend on the bonding energy such as modules of elasticity, young modulus,
coefficient of thermal expansion and melting temperature.
c- Differentiate between typical metallic bonding: Cu, Al, Au, Ag, etc. and hydrogen bond in water
d- How the materials contrast from single crystal and polycrystalline, in which case it's possible to see the grain
boundary, show the advantages of the grain boundary in nanomaterials.
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