Making Graphene Quantum Dots

Подписаться 47 тыс.

Просмотров 6 тыс.

50% 1

Synthesis of graphene quantum dots from citric acid and urea. I fully intend to make this into a full series.
Materials: Citric acid, urea, UV source
Hazards: None
Method: "Controlled synthesis of blue luminescent graphene quantum dots from carbonized citric acid: Assessment of methodology, stability, and fluorescence in an aqueous environment" (Materials chemistry and Physics Journal Volume 220)
Reupload from my tik-tok #science #chemistry #color #acid #quantum

Опубликовано:

7 авг 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 50

@monosodium-glutamate Год назад

'You can also make them at home' >ultrasonic cleaner >0.22 micron filter needle

@integral_chemistry Год назад

LMAO yeah I forget sometimes those aren't normal things to own

@fredericomba Год назад

You can make them, but separating them is another step.

@ZawaOnYoutube Год назад

All available on Amazon

@ZeddZeeee Год назад

really cool, well spoken and neat, i had never considered how they were made but neat to know. Thanks! and keep up the great work, excited to see what comes next! :)

@integral_chemistry Год назад

thank you so much!

@davidfetter Год назад

Nicely done!

@_macrophage 11 месяцев назад

Just found your channel.. Great stuff.. Keep going

@KrishnaSoftMatterLab 7 месяцев назад

Yes! A video on quantum mechanics.

@integral_chemistry 7 месяцев назад

They are rare for some reason..

@user-rc4hn5ik4m 6 месяцев назад

Tried it just now. It really worked!!!

@integral_chemistry 6 месяцев назад

Awesome! Was it the same color? I've found it red-shifts the longer you leave it in the microwave, but at a certain point it collapses and you get no fluorescence

@udayagirigdc 2 месяца назад

Please do a video on how to get carbon quantum dot powder.

@chemistryofquestionablequa6252 Год назад

Other than drying and sieving the dots to get the correct size, the only other way I can think of that you could do at home would be with a centrifuge.

@integral_chemistry Год назад

Centrifuge seems to be the go-to method in all the literature I read on this process.. wish they were more affordable 😅😅

@armenenikolopov Год назад

@@integral_chemistry there's some work getting high G centrifugation using very cheap materials - like string and paper - that came out of Manu Prakash's lab at Stanford . They were using this for inexpensive blood analysis in 3rd world settings, you might be able to get it to work for you though.

@zodd0001 Год назад

During my master thesis I prepared by thermal degradation of citric acid and ammonium acetate. Purification by dialysis. Usually gqd emission is excitation dependent, color change with excitation

@integral_chemistry Год назад

Oh really? Huh that is good to know before I start trying to make several batches that all end up looking the same.. you think then I would get a different emission with these same dots using my UV-C lamp?

@zodd0001 Год назад

@@integral_chemistry yours are not dialyzed but I think you should try with a blue lamp

@lalitasharma6687 10 месяцев назад

It would be better if you draw the reaction first on the board and then perform the experiment

@integral_chemistry 10 месяцев назад

yeah I think I'm going to start doing that more for more complex reactions

@muntahamahin9744 5 месяцев назад

Which type of syringe filter did you use can you tell me?what’s the pore size?

@oitthegroit1297 10 месяцев назад

What music did you use? It goes perfectly with the video.

@integral_chemistry 10 месяцев назад

Thank you! and uhh its one of Beethoven's piano sonatas.. lemme figure out which one and try to get back to you

@jyotikhelan9590 11 месяцев назад

Hello.. can u please help me for graphene quantum dots synthesis for breast cancer treatment as a sensor

@ruturajdachawar4364 9 месяцев назад

Can we get a full video please

@integral_chemistry 9 месяцев назад

I've been meaning to make one for ages.. definitely make a note to bump it up on my to-do list

@karlobrebric2083 10 месяцев назад

Who is here after the nobel announcement.

@AdricM Год назад

amazing im gonna see about replicating!

@integral_chemistry Год назад

Let me know how it goes! I did this vid in a response to a request to demo the easiest possible diy quantum dots and this is the best I could come up with. I did also try this with glucose instead of citric acid and sodium hydroxide instead of the urea and it also worked, but it was a bit more sensitive to the microwave.

@david2ljdavid2lj56 Год назад

The brown color makes me think you made graphine oxide.

@bacchemankesacche6404 Год назад

how to check the size of as synthesized quantum dots

@integral_chemistry Год назад

UV/Vis and then apply the equations I included at the end.

@j121212100 Год назад

moonlight sonata second movement? strange background music for the topic and narration.

@bacchemankesacche6404 Год назад

i checked by DLS it is not giving the single peak and also avg size more than 400nm

@integral_chemistry Год назад

Yeah I'd actually recommend simple UV/Vis. In lieu of some heavy centrifugation you're going to get such a wide range of particle sizes that DLS won't work all that well. Use the wavelength peaks in UV/Vis along with the formula at the end of the vid to calculate particle size

@saidos1 9 месяцев назад

DLS gives you hydrodynamic size but not exact size. all impurities sticking on the qds, ions etc. is within the size. TEM would be better.

@jyotikhelan9590 11 месяцев назад

Please give me the doi no. This article

@0-Kirby-0 Год назад

"Inorganic synthesis" Citric acid seems organic to me...

@integral_chemistry Год назад

very fair point lol

@0-Kirby-0 Год назад

@@integral_chemistry Nah just a dumb nitpick lol Great video btw

@Drjtherrien 9 месяцев назад

My PhD thesis was about silicon nanoparticles we made using electrochemical etching. I had to use a HPLC system to separate the particles by size. I would imagine this could work here too.