WorksheetsNanotech and MatScience Lecture 4
Total questions: 11
Worksheet time: 21mins
Name
Class
Date
1.
With decreasing the size of an object the ratio of inertial and viscosus force
a)
increases.
b)
decreases.
2.
Superplasticity
a)
is a consequence of movements of dislocations.
b)
requires nanograins full with dislocations.
c)
is based on grain interface effects.
d)
allows elastic deformation
3.
Nanowires
a)
can store Li thanks to the same crytal structure.
b)
are bandable due to disloacations.
c)
allows to form heterostructures not accessable in bulk form.
d)
of Si after delithiation fracture.
4.
What is the typical thickness of a cell wall?
a)
≈ 0.5nm
b)
≈ 5nm
c)
≈ 50nm
d)
≈ 500nm
5.
DNA origami is
a)
a self-assembly bottom up approach.
b)
based on evolution principle.
c)
allows to form 2 and 3D conductors.
d)
relies on hidrophobic interaction.
6.
Phage display technique
a)
uses viruses to produce the desired molecule.
b)
is based on careful DNA design.
c)
results a large phage library.
d)
uses bio amplification.
7.
Van der Waals interaction is
a)
based on hydrogen bonding.
b)
based on attraction between spontaneously induced dipols
c)
the cohesive force of cell wall.
d)
stronger than hidrogen bonds.
8.
Gecko tape
a)
uses skin torn from the sole of the gecko.
b)
has good adhesive property due to hydrgen bonding.
c)
maximizes the area of touching surfaces.
d)
leaves residue on the surface.
9.
Nanoscale catalysts are attractive since
a)
their surface/volume ratio scales with 1/radius ^2.
b)
nanosize could lead to novel chemical properties.
c)
they are less toxic.
d)
their production is cheaper.
10.
Schockley–Queisser limit describes the efficiency
a)
of solar cells in general.
b)
of single pn junctions
c)
of single pn junctions illuminated by sun
d)
of pn junctions illuminated by sun with carrier multiplication.
11.
Multijunction cells
a)
are widely used due to their large efficiency.
b)
have higher efficiency, since they enhance e relaxation.
c)
capture high energy photons first.
d)
fullfills the Schockley–Queisser limit.
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