Where Can I Find Dielectric Constants of Neurons at Optical Frequencies?

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SUMMARY

The discussion centers on locating dielectric constants of neurons and nerve fibers at optical frequencies ranging from 1e12 to 1e14 Hz. The user references Gabriel 1996 for data up to 1e11 Hz and highlights the lack of experimental data for higher frequencies. They mention the need for theoretical work to understand the dielectric properties of biological tissues, emphasizing the importance of dispersion relations and skin-depth functions. Two resources are provided: a journal article outlining a general equation and a PDF that elaborates on this equation with applications.

PREREQUISITES
  • Understanding of dielectric properties of biological tissues
  • Familiarity with optical frequency ranges (1e12 - 1e14 Hz)
  • Knowledge of dispersion relations in materials
  • Basic grasp of skin-depth functions in electromagnetic theory
NEXT STEPS
  • Research the dielectric properties of biological tissues using Gabriel 1996 as a reference
  • Study the general equation for dielectric constants outlined in the provided journal article
  • Explore the applications of cantorian fractals in modeling dendritic processes
  • Investigate terahertz exposure effects on biological tissues through the provided state-of-the-art paper
USEFUL FOR

Researchers in biophysics, neuroscientists, and engineers working with optical frequencies in biological systems will benefit from this discussion.

MarkoF
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Hello! First time poster. I hope this is not a wrong sub-forum for this kind of question.

Can anyone tell me where can I find values for dielectric constants of neurons and nerve fibers for frequencies in the range of 1e12 - 1e14 Hz (optical and RF part of the spectrum)?

I have found data only up to 1e11 Hz (Gabriel 1996 - The dielectric properties of biological tissues: III), and most of the other works cover frequencies up to GHz.
 
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I don't think biological tissues really have a "constant". They probably have a skin-depth function and a dispersion relation. After a little internet research:

Here's a journal article that outlines a general equation

http://pre.aps.org/abstract/PRE/v60/i4/p4677_1

here's a PDF referencing the above journal and breaking down the equation a little bit and giving some simple applications (cantorian fractals may be a way to model dendritic processes).

http://permittivity.org/tutorial%20pdf/bds-tut-09-raicu.pdf

I'm not sure this is really a simple question. If there's no experimental data, someone has to do the theoretical work based on what's been observed.

Here's a note on the state of terahertz exposure for biological tissues in general:

http://eprints.whiterose.ac.uk/761/
 
Last edited by a moderator:
You are right, it would rather be a function, my mistake.

Thank you for the links, they look very promissing! It would seem that I have yet to learn about proper net searching. :-)
 

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