Dear Vinay,
nanoparticle (NP) are the subject of investigation in solid state physics. With
1nm = 10-9 m = 10-7 cm the diameter is at least 10 time the diameter of a hydrogen atom. The energy structure of such a NP is influenced strongly by confinement effects and the density of states is very different from 3-dimensional bulk-material.
A hypothetic picoparticle is with 1pm = 10-12 m = 10-10 cm smaller than the diameter of an hydrogen atom (10-8 cm and larger than the diameter of an atomic nucleus (10-13 cm). In this scale neither solid matter (too small) nor elementary particles (theirfore too large) exist. That means, NP's are not existent.
Of course, you could a NP with D = 1000 pm call a picoparticle, but this is an nanoparticle. Even atoms or molecules are too big for a picoparticle.
With Regard
R. Mitdank
Dear Vinay,
nanoparticle (NP) are the subject of investigation in solid state physics. With
1nm = 10-9 m = 10-7 cm the diameter is at least 10 time the diameter of a hydrogen atom. The energy structure of such a NP is influenced strongly by confinement effects and the density of states is very different from 3-dimensional bulk-material.
A hypothetic picoparticle is with 1pm = 10-12 m = 10-10 cm smaller than the diameter of an hydrogen atom (10-8 cm and larger than the diameter of an atomic nucleus (10-13 cm). In this scale neither solid matter (too small) nor elementary particles (theirfore too large) exist. That means, NP's are not existent.
Of course, you could a NP with D = 1000 pm call a picoparticle, but this is an nanoparticle. Even atoms or molecules are too big for a picoparticle.
With Regard
R. Mitdank
Rüdiger Mitdank Useful other information from Google search
Diameter of the proton is ~ 0.877±0.007 femtometers or ~ 0.000877 pm
1 Electron radius ~ 0.00282 pm
To Vinay and all readers,
Mr. Schmitt gave an essential hint. Of course there is a typ error in my remarks:
The sentence must be: That means, PP's are not existent.
I ask to excuse this error.
With Regard
R. Mitdank
To Alan F Rawle,
the question is: how we define a PP. What we observe is: For "normal matter" we have an existence gap between 1 fm and 100 pm. The upper limit consists of NP's. It is composed (solid) matter, atoms and so on. Below the lower limit of about 1 fm you have elementary particles. This is the range you describe in your contribution.
With Regard
R. Mitdank
Rüdiger Mitdank My comment was to ask if you were meaning 'non-existent' (English language correction) or 'do not exist'. 'Not existent' does not make sense in English. We'd say 'do not exist'. What could follow 'not' in this context would be something like 'not possible' or not 'capable of existence' or something similar.
Vinay S P Have you read the answers? There is no such thing as a picoparticle. Try looking for yoctoparticles instead. Is somebody playing with you or teasing you?
You've also removed your last post, Vinay, which makes this post seem out of context.
I despair when I see "nano". The term "nanoparticle" is a modern (
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