Questions tagged [electrical-properties]
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Calculating the net charge of DNA oligo
How can I calculate the net charge of a DNA oligo? I have a bunch of different sized oligos (vary from 9 to 50nt long) which I am using for microscopy (DNA-PAINT) and I need to know their charges ...
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How do I show that a transition is electric dipole allowed with group theory/symmetry?
This is actually a follow up of this question
The follow-up is not because of the electric instead of magnetic dipole (this is trivial).
It is because I'm interested in extra info.
Suppose I have a ...
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What is the net gain of charge carriers in a semiconductor if an atom is removed?
In pure germanium, all Ge atoms are bonded with a tetrahedral geometry. It has a band gap and is a semiconductor. If we remove one Ge atom, what type(s) and how many charge carriers will be generated? ...
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Why is copper a better conductor of electricity than calcium?
How would we compare the electrical conductivity between copper and calcium? I understand that electrical conductivity of a metal is dependent on the number of delocalized electrons for that metal. ...
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How is graphene electrically conductive?
I've been doing some research into graphene for a project I'm working on, and have found that it can potentially be as strong as or even stronger than current superconductors. However, from my current ...
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Conductivity measurements of demineralized water - Unexpected results. Looking for explanation
I'm trying to measure the conductivity change of demineralized water over a few days. But I get results I can't explain.
Setup
This is the circuit and cell I'm using:
Where $R_x$ is the ...
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What is the electrical conductivity of pool water?
What is the electrical conductivity of pool water? I tried to find some information, unfortunately without success. I need to know it to make an underwater electronic project.
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Salt concentration and electrical permittivity of water
We know that the electric flux density $D$ can be related to electric field intensity $E$ as
$$D = \epsilon(\omega) E$$
where
$$\epsilon(\omega) = \epsilon_0 \epsilon_r(\omega)$$
and $\epsilon_0$ ...
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Electrical conductivity of graphite
On this Wikipedia page, the electrical conductivity of various materials are given in the third column ($\sigma \text{ (S/m) at 20}^\circ \text{C}$). I am interested in the entry for Carbon (graphite)...
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Choice of doping elements in semiconductors
In a typical semiconducting material, we start with silicon (group IV) and introduce atoms of group V or group III depending on whether we are constructing an n- or p-type semiconductor respectively.
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