Synthesis of Inverse Opal Photonic Crystals
Synthesis of Inverse Opal Photonic Crystals
You will find the full description of this activity at: https://education.mrsec.wisc.edu/synthesis-of-inverse-opal-photonic-crystals/
Photonic crystals are periodic optical nanostructures that are designed to affect the motion of photons in a similar way that periodicity of a semiconductor crystal affects the motion of electrons.
Photonic crystals occur in nature and in various forms have been studied scientifically for the last 100 years. Inverse Opal Photonic Crystals are three-dimensional structures formed from self-assembly — essentially a mixture of dielectric nano-spheres to settle from solution into three-dimensionally periodic structures possessing photonic band-gaps. (From: http://en.wikipedia.org/wiki/Photonic_crystal)
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I really wish this had something that says whats going on and the process. I wanted to learn how to make synthetic opal.
Would have been a good video if someone narrated it.
So how are natural opals made? Why are there clam opals?
how about add some narration / voice explaining? Why do scientists always produce such lousy videos lol…
What chemical and powder was used?
very nice. but can you make opal pieces that aren’t crumbling to bits like that?
and are your spheres of equal size?
It would be great if you spoke during the video it would be more entertaining, !
boy you dumb ass better start making cocaine and stop making this fake ass OPAL
Why some parts are constituted of nanospheres and some parts are constituted of inverse structure? I am confused, at last few seconds, after nanospheres disappear (seems like corrosion by HF?), what material left(seems not SiO2)? TEOS is useful to connect nanosphere each other I think.
Well I recognized the magnetron for sputtering onto the surface and the scanning electron microscope for the images, but the video could use more information. I am not sure what the reagents used are but would love to try this myself! Very neat subject matter. I was just reading about photonic crystals about two weeks ago.