the Ferrocell

[sadang]

A great picture, at least for me! Because I'm interested in ferrocel's images only to understand the magnetism in its intimate structure, I'm trying to pay attention mainly to all these aspects.

What I see here is rather a RGBY than a RGBW ring of LED and their effect over the ferrofluid particles in the presence of a magnetic field. What I see here (at least in my interpretation) are effectively the magnetic lines of force and their shape around the magnet, due to reflection of light by the coherent alignment of the ferrocel particles. Of course this is only an in plane view of the magnetic lines, only a slice of the entire complex and beautiful 3D structure of the magnetic field.

Why is this image valuable for me is due to that white line that I drew over the image, and where the colored lines appear to end. This happen due to the angle shift of the ferrocel particles so that the light is reflected under a different angle, making their arrangement invisible to the eye. Changing my eyes angle of view, the lines will continue, form here the holographic effect that can be achieved by these ferrocel units in the presence of magnets.

Going further with my analysis, that shift of ferrocel's particles angle along that white line (or the vertical half of the magnet) tell me the magnetic lines of force change their polarization effect over the ferrocel's particles. Why that happen in a vertically structured and discrete continuous lines of force of the magnetic field?

Another thing I don't understand is why only one color for a single colored line? Why the color don't mix along a single line of magnetic field? The polarization of the ferrocel particles by the magnetic field make them to obey the same angle along one single colored line, but don't explain why they reflect only one color! There is something I miss?

[TinselKoala]

That picture sure doesn't seem like the hues of the lines are any different than what is being emitted by the LEDs. The camera of course has a different color response than the eye does, hence the "blue" looks more purple in the camera image ... but the LEDs and the lines look very close in hue in the picture.

Spectroscopy is probably the only way really to tell if there is an actual frequency shift happening.

[pinestone]

Every school should have one.

That's the plan
It's in the works and we already have a test-bed school near me...
a nanotech-quantum-photonic-plasmonic experiment to open young (and old) minds.

[pinestone]

That picture sure doesn't seem like the hues of the lines are any different than what is being emitted by the LEDs. The camera of course has a different color response than the eye does, hence the "blue" looks more purple in the camera image ... but the LEDs and the lines look very close in hue in the picture.

Spectroscopy is probably the only way really to tell if there is an actual frequency shift happening.

Yes as I said earlier, there is a little phase shift of light when it passes thru the cell. It's a down-converted sort of thing and a result of Rayleigh Scattering: http://en.wikipedia.org/wiki/Rayleigh_scattering

I'll post the spectrometer test results soon and you will see how it shifts light down in frequency. Blue becomes violet- the other colors aren't so easily recognized without instruments.

[pinestone]

A great picture, at least for me! Because I'm interested in ferrocel's images only to understand the magnetism in its intimate structure, I'm trying to pay attention mainly to all these aspects.

What I see here is rather a RGBY than a RGBW ring of LED and their effect over the ferrofluid particles in the presence of a magnetic field. What I see here (at least in my interpretation) are effectively the magnetic lines of force and their shape around the magnet, due to reflection of light by the coherent alignment of the ferrocel particles. Of course this is only an in plane view of the magnetic lines, only a slice of the entire complex and beautiful 3D structure of the magnetic field.

Why is this image valuable for me is due to that white line that I drew over the image, and where the colored lines appear to end. This happen due to the angle shift of the ferrocel particles so that the light is reflected under a different angle, making their arrangement invisible to the eye. Changing my eyes angle of view, the lines will continue, form here the holographic effect that can be achieved by these ferrocel units in the presence of magnets.

Going further with my analysis, that shift of ferrocel's particles angle along that white line (or the vertical half of the magnet) tell me the magnetic lines of force change their polarization effect over the ferrocel's particles. Why that happen in a vertically structured and discrete continuous lines of force of the magnetic field?

Another thing I don't understand is why only one color for a single colored line? Why the color don't mix along a single line of magnetic field? The polarization of the ferrocel particles by the magnetic field make them to obey the same angle along one single colored line, but don't explain why they reflect only one color! There is something I miss?

That's one reason I started posting here on OU. Everyone here is a magnet nut and interested in finding out more than the textbooks can show.
I love to answer questions about the cell !

The holographic effect comes from chaining and assembly of the nanoparticles while influenced by a field. Similar to a holographic diffraction grating, but not rigid and solid like 'theirs'. see the green pix: its a close up of the particle chains (dual helix's) in a field.

The white line comes from the duct tape I wrapped the neo magnet with. The edges glow white, but they are black. I did this to cut down on reflections from the shiny coating (nickel) on the neo. I don't completly understand your question- maybe rephrase it for me?
See the second pix: It's taken at a 45 degree angle to the lens. You can see the tape more clearly here.

And the light is not reflecting. Combining the magnetic field with light produces surface waves from the nanoparticles (surface plasmons).
These plasmons follow the lowest potential of the field (not N or S) and each LED is fixed at a different angle (each 10 degrees), so we see each light following it's own path.

I just added a 3rd pix of the pole (not sure if its N or S, I didn't measure it). There is a small sheet of black plastic on top of the magnet.