Lead Sulfide Quantum Dots Synthesis

[@chsor4]

Be advised that the sulphur precursor they use is not HMDS, as noted. It is most likely Hexamethyldisilathiane. HMDS, used to prepare Si wafers for photoresist, does not contain any sulphur.

[@annsome]

Great info! Btw, Ashley is a doctor now and working in the university of Oxford.

[@christopherleubner6633]

12 years ago. PbS and PbSe would have very strong resonance in the reddish orange to near IR bands. (580 to about 2000nm wavelengths) Also they would be reasonably air stable as well.❤

[@mrgerlo]

Hi there, in the introduction part, when Ashley is describing the ingredients, she says add 1.4g of Oleic Acid, then explains that is kept in the fridge for preservation and then says, we add 1.2g of that. Can you please add a note with the correct amount?? thanks!

[@thanawitsagulthang6471]

I have been looking for this for a long time

[@김승규-y7q]

6:45 there's no sulfur in hexylmethyldisilazane, but how does it become PbS when reacted with Pb precursor? seems like confused with hexamethyldisilathiane FYI

[@jemaiisafa6299]

is there a publication on this? Please i need it as a reference

[@Rachael-b2h]

.....any thought or concern of the effects ? Doesn't look like it ....

[@BRYDN_NATHAN]

Thank you. Excellent experiment 👍

[@eitan166]

Very good and instructive video, thank you!

[@ghulamfareed7890]

What is sulphure source?

[@AnkitaSingh-bh4zj]

Can you suggest a procedure for MoSe2 nanoparticles and if the synthesis is possible without a glovebox?? Thank you

[@XainZ14]

Hello everyone, very precise and nice video; I just have one question what kind of plugs are used in this synthesis method for thermocouple and precursor injection as I am having issue of oxidation in similar method and using silicone caps????? Hoping to hear reply soon.

[@rijuwanahaque8054]

For how much time I have to centrifuge it??

[@adrienyepseu7798]

Hi, very good video

[@marianapomohaci6080]

Is this the mark of the beast in Revelation?? Those who receive the mark of the beast are dammed forever.

[@christopherleubner6633]

Naw just mini crystals of lead sulfide that are so small they act like antennas for light.😁🤓

[@christopherleubner6633]

No, it is simply a method of making florescent crystals with a very precise emission band. Can use almost anything to make these so long as it have a discrete band gap of voltage, for example GaN would make UV to green, PbSe would glow in the near infrared, this version would glow mostly yellow-orange at the particle size chosen.❤

[@jesscorbin5981]

Is the acetone step ubiquitous for all these quantum dot synths?