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#Post#: 2424--------------------------------------------------
Why graphene is stronger than graphite?? post#1 clarifying the
terminology.
DIR By: Cheminized
Date: April 7, 2013, 9:30 pm
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this is from a posts mini series that I started on my facebook
page:
Why graphene is stronger than graphite?
Post#1: clarifying the terminology
If you ask why graphene is stronger than graphite?, most of the
people who don't really know the answer to that question would
say that the reason is something related to Nano Technology, and
I find that answer pretty misleading.
Nano Technology is about how do we make Nano materials, how do
we study them and how do we use them. The answer to the question
is related to the properties associated with Nano materials, and
that's what we're going to discuss in future posts.
For people who don't know the meaning of Nano materials, simple
put they are materials with dimensions so small so it's more
convenient to express their dimensions in nanometers (nm).
In the image you'll find several objects and their dimensions
expressed in nanometers.
Stay tuned for post#2 of this posts mini series.
#Post#: 2429--------------------------------------------------
Re: Why graphene is stronger than graphite?? post#1 clarifying
the terminology.
DIR By: Michel
Date: April 8, 2013, 3:02 am
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Graphite is a 3-dimensional material, consisting of hexagonal
planar layers of Carbon atoms that are bonded by weak bonds(due
to van-der-waal forces). The macrostructure would be better
described as different layers of the planar graphene molecules
arranged in different orientations, hence it would break along
the weak bonds perpendicular to the applied stress (the bonds
between the C atoms in the planar ring are strong, but the bonds
between the graphene sheets are weak)
Graphene on the other hand can be described as a two
dimensional material consisting of different hexagonal planar C
atoms bonded end to end (adjacent to each other). Hence it is
one atom thick! It has to be far stronger as a material than
graphite, since all its bonds are C-C strong covalent bonds.
Although it is 2-dimensional, it can be made into thin sheets (1
atom thick), hence it is stronger than either diamond/graphite.
More contributions to the thread would be appreciated.
#Post#: 2433--------------------------------------------------
Re: Why graphene is stronger than graphite?? post#1 clarifying
the terminology.
DIR By: Cheminized
Date: April 8, 2013, 12:34 pm
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yes that's the correct answer....
but the reason i didn't want to put the whole thing in one post
is to enlarge the area of discussion, and to make more engaging
for the reader.so in post#2 I'll be talking about the chemical
structure of graphene and graphite and i will try to make a more
in depth discussion of interactions between chemical species of
interest. so in the mean time if any one has a question
regarding Nano materials and Nano Technology, it would be a nice
chance so we all can discuss it, and we all can learn from each
other expertise. ;D
#Post#: 2440--------------------------------------------------
Re: Why graphene is stronger than graphite?? post#1 clarifying
the terminology.
DIR By: hkar19
Date: April 10, 2013, 5:47 am
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and one day, my friend tell me this:
"one day, one scientist think how to make graphene 1 atom thick.
he is thinking and thinking.
then he came to conlusion:
he using scotch tape to graphene powder and then do something to
make the scotch away. then he get 2 dimensional graphene"
i think that is a scientific joke. hahahaha
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