Nanomaterials

Question 1

Nanomaterials are materials wherein the sizes of
the individual building blocks are less than _______, at least in one dimension.

Answer 1

100 nanometer (nm)

Question 2

Usually
nanomaterials are developed to show innovative
characteristics compared to the same material
without the nanoscale features which includes

Answer 2

increased strength, chemical reactivity or
conductivity.

Question 3

It is engineering, science, and
technology conducted at the nanoscale, which is
about 1 to 100 nanometers.

Answer 3

Nanotechnology

Question 4

are the study
and application of extremely small things and
can be used across all the other science fields,
such as engineering, chemistry, biology,
materials science, and physics.

Answer 4

Nanoscience and Nanotechnology

Question 5

The father of nanotechnology

Answer 5

Richard Feynman

Question 6

Conventional Technology uses a “_______”
approach while Nanotechnology uses a “__________” approach.

Answer 6

Top-down, bottom-up

Question 7

This means starting from large pieces of
material and producing the expected structure by
mechanical or chemical methods.

Answer 7

Top-down

Question 8

processes are where atoms or
molecules are used as the building blocks to
produce nanotubes, nanoparticles, or nanorods,
or thin films or layered structures.

Answer 8

Bottom-up

Question 9

In the formation of nanorods and nanoplates, the
influence of ___________ is to be considered.

Answer 9

surface energy

Question 10

The second possibility of obtaining nanorods and
nanotubes is related to layered structures, where
the ___________ is built from layers held
together with _________ forces rather than by
__________.

Answer 10

crystal structure, van der Waals, electrostatic attraction

Question 11

Only three of the four valences of the carbon atom
are _______. The fourth electron of the atoms
remains ________ and becomes ________
across the hexagonal atomic sheets of carbon.

Answer 11

saturated, unbound and becomes delocalized

Question 12

Graphite is an

Answer 12

Insulator

Question 13

Single layers of graphite are known as

Answer 13

Graphene

Question 14

These single layers of graphite are known as
graphene, and because of its structure and
bonding graphene is denominated as an infinitely
extended, _______

Answer 14

two-dimensional aromatic compound

Question 15

Nanotubes are formed by _________
layers to form a tube.

Answer 15

wrapping graphene

Question 16

Fullerenes consist of a combination
of

Answer 16

hexagons and pentagons.

Question 17

The formation of nanotubes is not limited to
single graphene layers. As for fullerenes, both
_______ and ________ nanotubes may be
observed.

Answer 17

multi-wall and single-wall

Question 18

have innovative and exceptional
properties and are currently being used in some
cutting-edge technologies and will certainly play
an important role in future high-tech
applications.

Answer 18

Nanocarbons

Question 19

The material composed of C60 molecules is
known as _______, (or buckyball
for short), named in honor of _______, who invented the ________; each
C60 is a molecular replica of such a dome. The
term fullerene is used to denote the class of
materials that are composed of this type of
molecule.

Answer 19

buckminsterfullerene, R. Buckminster
Fuller, geodesic dome

Question 20

In the solid state, the C60 units form a crystalline
structure and pack together in a face- centered
cubic array. This material is called _______

Answer 20

fullerite

Question 21

fullerenes that have
additional atoms, ions, or clusters enclosed
within their inner spheres.

Answer 21

Endohedral Fullerenes

Question 22

are fullerenes that have
additional atoms, ions, or clusters attached to
their outer spheres.

Answer 22

Exohedral Fullerenes

Question 23

Carbon nanotubes also have unique and
structure-sensitive electrical characteristics.
Depending on the orientation of the hexagonal
units in the graphene plane with the tube axis,
the nanotube may behave electrically as either a ________

Answer 23

metal or a semiconductor

Question 24

As a metal, they have the potential for use as
_________. In the
semiconducting state they may be used for
_________.

Answer 24

wiring for small-scale circuits; transistors and diodes

Question 25

Nanotubes are excellent electric field emitters.
As such, they can be used for flat-screen displays

Answer 25

true

Question 26

as the newest member of the
nanocarbons, is a single-atomic-layer of graphite,
composed of hexagonally sp2 bonded carbon
atoms. These bonds are extremely strong, yet
flexible, which allows the sheets to bend.

Answer 26

graphene