All Questions
Tagged with material-science electrostatics
27
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Do contact forces form a field/wave?
Non-contact forces like gravitational forces exist between two objects in any medium because of the establishment of a field/wave.
Since at an atomic level, 'physical' contact won't really be possible ...
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88
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At which distance a 2D material like graphene is safe from charging impurity of a $\rm SiO_2$ substrate?
$\rm SiO_2$ substrate is widely used for the research of 2D materials but charging impurity of amorphous $\rm SiO_2$ degrades their performance, e.g. reduces the conductivity of graphene.
Inserting ...
-1
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1
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136
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How do pencil erasers erase on a fundamental level?
One could say we're taking advantage of friction, but I want to dig deeper down to atomic level: what's the process or chain that happens when one erases?
Edit: subatomic -> atomic
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3
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Static electrification of the same material at different temperatures
In the following books it is stated that when you have 2 samples of the same material at different temperatures and they are rubbed together, the colder one gets electrified positively, the hotter one ...
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What happens when a positively charged ion such as $\rm{O}_2^+$ hits an electrically neutral or positive surface?
The ionized molecule is ionized by electron bombardment. Considering this problem in a rough vacuum (let's say 0.3 Pa as to somewhat limit background noise if it affects the question), at average ...
- 21
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Can a material be electrically polarized with electromagnetic radiation?
Is charge separation possible by bombardnment of electromagnetic radiation?
As conventional dielectric materials can be polarized with a electric field, I am wondering if electromagnetic radiation, ...
- 477
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132
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EM Lorentz force field flux in the air gap of a parallel plates charging capacitor?
For a charging/discharging capacitor, simultaneously to the electric field created by the displacement current during charge/discharge cycle, a magnetic field is also generated in the area inside the ...
- 4,170
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What makes silicone sticky?
I've read from 3M's Adhesion Science articles and this StackExchange question that there are three types of adhesion: chemical, physical, and electrostatic.
I'm curious about what makes silicone ...
- 11
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Terminology: does this situation correspond to an anisotropic but linear dielectric?
Let us assume that for a dielectric the relation $${\vec D}=\epsilon\vec E$$ holds where $\epsilon$ is independent of $\vec E$. However, let $\epsilon$ is not a scalar number but a tensor (or a $3\...
- 11.8k
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How exactly do vinyl "static" clings work?
My son asked me this question today, and for the life of me, I can't come up with a good answer that even convinces myself.
Vinyl "static" clings are those decorative pieces of vinyl that ...
- 141
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24
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Why can't all plastics form electrets?
What property should a dielectric need to become an electret?
At first, I though polar dielectrics formed electrets, but non polar dielectrics like polypropylene also form electrets.
So what property ...
1
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Is a molecular orbital the same as a state function for the single particle Hamiltonians that appear in SCF?
Amongst the self-consistent field methods, the practitioner solves a set of Schrödinger like equations for independent electrons. I have tried to understand what a molecular orbital is from the ...
- 1,356
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330
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How long can static charge stay on a material?
When a material/body gets charged, the charge can be discharged by conduction. What if the charged body is place in a vacuum where the charge can't be discharges through air, how long can the charge ...
- 13
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42
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Electrostatic force and deformation
Can an electrostatic force cause plastic deformation of an object ? So if we two charged opposite sheets of paper
and we hold with our hands the two plates will the electrostatic attraction cause ...
- 1
3
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3
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What's the explanation of 'paper pieces and comb experiment' about static electricity on atomic level?
I know that the charged comb induces static electricity in the paper pieces.how does that happen? Do the atoms in the paper get ionized,the same what happens when the comb was rubbed on hair?please ...
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