Bulk, Cluster, molecule

by assed
Tags: bulk, cluster, molecule
assed is offline
Sep12-13, 06:54 AM
P: 19
I often find those terms when dealing with material science but I can't teel precisely the difference or the definition of which of these terms. Can anyone help me?
Phys.Org News Partner Physics news on Phys.org
Modification of structural composite materials to create tailored lenses
Novel technique opens door to better solar cells
Probing metal solidification nondestructively
nasu is offline
Sep12-13, 08:24 AM
P: 1,896
Have you tried to look them up?
The meanings are quite different so should be little ground for confusion.

For me it's not clear what your problem is actually.
You read about material science and are confused about "molecule"?
assed is offline
Sep12-13, 11:41 AM
P: 19
Well...your answer was not helpfull at all. Of course I tried to look them up before asking here. I never said I was confused about molecules, what I meant is that I cannot precisely determine what tells the diference between a cluster and a molecule. Besides that what i understand when I hear bulk is that we're talking about the internal part of the compound, not dealing with surface. Well, now that I explained myself better maybe someone could see what my problem is and help me.

nasu is offline
Sep12-13, 12:34 PM
P: 1,896

Bulk, Cluster, molecule

Your explanation was helpful though.

In my understanding, a cluster is an aggregate of atoms or molecules so that the properties are somehow between these of the single molecules and those of a macroscopic solid (bulk).
But I suppose you know this already.

A similar problem is maybe defining what makes a particle a "nanoparticle".
They have some "special" properties. For example superficial phenomena becomes important. Or magnetic nano particles do not break into domains like bulk ferromagnets.
The specific size may depend on the material and the properties under study.

So clusters may be made from a few atoms up to thousands, maybe more.

Register to reply

Related Discussions
Polarity in water molecule and electronegativity of oxygen in that molecule. Chemistry 7
cluster radioactivity --- preformed cluster model High Energy, Nuclear, Particle Physics 5
Suggestion Cluster map. Forum Feedback & Announcements 12
fat molecule, protein molecule Chemistry 1
How is the energy of an excited electron in one molecule sent to another molecule? Biology, Chemistry & Other Homework 4