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/sci/ - Science & Math

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12608277 No.12608277 [Reply] [Original]

Doing my Master's thesis on crystal growth. Anyone know of any good prof's I can poke the brain of for some insight.

>> No.12608380

>>12608277
What kind of crystals?

>> No.12608562

>>12608277
what literature are you reading? I'm studying this subject too

>> No.12609727

>>12608277
Professor Crystal

>> No.12609792

Guys halp, I need to grow a single crystal for XRD

Any tips

>> No.12610086

>>12609792
what kind of crystals?

>> No.12610654

>>12610086
Sphingolipids and aliphatic aldehydes

>> No.12610692

OP here.

It's the weird stuff that happens when you let a solution of inorganic (e.g. CuSO4) dry out. It's not the ordered, regular crystals that we see in their various prismatic forms, but the random, fractal patterns that form elsewhere. He's studying it, calling it "plasmonics" due to how it wanders.
For example, the "crystals" will end up climbing up and out of the beaker if left long enough. He's studying that right there.
XRD has shown them to have the same structure as traditional crystals, but he's convinced of it and he's my PI, so I do as he wishes. He may be a rambling madman, but his ramblings are at least interesting.

>> No.12610752

>>12610692
>XRD has shown them to have the same structure as traditional crystals
So then what makes them different? A difference in nucleation maybe?

>> No.12612263

>>12610752
mayhaps? Their characteristics are different. Adhere STRONGLY to the glass, like as if they were super glued on. We've also noticed that it has a threshold between redox reactions vs crystallizing out. At low concentrations, it performs redox until it reaches a certain conc. as it dries out and then crystallizes. Higher concentrations simply crystallize straight out and don't do redox.
Also, the crystals separate themselves based on oxidation states. CuSO4 with an Iron rod in it will segregate into Cu(I) and Cu(II) layers.

>> No.12612307
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12612307

>>12610692
>For example, the "crystals" will end up climbing up and out of the beaker if left long enough
Neat, I've got some K2HPO4 doing that right now. Do you know why it happens or what causes it? Are they "climbing" via capillary action?

>> No.12612352

>>12612263
Maybe you should check to see if you aren't getting nanoparticles or nanocrystals forming. Run UV-Vis or SEM. Just a thought.

>> No.12613688

>>12612307
precisely, I thought it was just capillary action too, but the solvent surely can't carry itself through the crystalline matrix, my PI says.

>>12612352
Our SEM is broke currently, would it be like a UV-Vis solid spectra, or did you mean to re-dissolve it and then run UV-Vis?

>> No.12614383

>>12613688
>would it be like a UV-Vis solid spectra, or did you mean to re-dissolve it and then run UV-Vis?
Just do your normal procedure and when your ready to let it crystalize take a liquid sample to see if your making nanparticles during your synthesis. Try low concentrations first.

>> No.12615769

>>12610654
Pls halp, can't grow shit from ethyl acetate

>> No.12615864
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12615864

>>12608277
The Czochralski method, named after the most cited Polish scholar, would help you immensely.

>> No.12615922

>>12610654
>>12615769
Have you tried chloroform/methanol solution?

>> No.12615939

>>12612307
ignorant anon here, wouldn't it be more a surface tension of the fluid 'climbing' over the existing structure as the matrix is already solid?

>> No.12615984

>>12615939
see >>12613688
His PI says that is not the effect.

>> No.12615988

>>12615984
oh that's what you mean by capillary, so what is the mechanism?

>> No.12615991

>>12615988
that's what he is trying to figure out lol

>> No.12616015
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12616015

>>12615988
okay dammit now I need to read up, I've never actually given the mechanism any thought heheh

>> No.12616028

>>12615939
>>12615984
>>12615988
OP here. I mean, he could be wrong. Just cause he's my PI, don't mean he's inculpable.

>> No.12616033
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12616033

>>12616028
true hehe