What Are Quantum Dots?

[@hardikb15]

finally found the stuff that baited us into studying chemistry

[@FrankAaron]

MDMA and Crystal meth?

[@richarizard526]

Lmaooooo fr

[@RexGalilae]

This is more solid state physics lol but yeah

[@ticktockbam]

I thought that was Breaking Bad

[@omhh1986]

@@RexGalilae 🤓🤓

[@yourwrong.]

I finally understand how a QLED actually works and I sell them 😂

[@AV.Creative]

Lol

[@donovanmahan2901]

Imagine the action lab gets sued for revealing a trade secret (despite it having no legs due to the "secret" likely being a published piece of scientific literature)

[@UserOfTheName]

@@donovanmahan2901 Linus tech tips went to a factory producing quantum dots

[@johndawson6057]

How's life?

[@mihailmilev9909]

@@donovanmahan2901 lol

[@totally_focussed8794]

This is so coooool holy crap. Thanks action lab :)

[@Call_Upon_YAH]

Jesus Christ is the propitiation for the whole world's sins. They that believeth and are baptized (with the Holy Spirit) shall be saved; but they that believeth not shall be damned. Those led by the Holy Spirit do not abide in wickedness. *God is ONE manifesting himself as THREE;* the Father, the Son, and the Holy Spirit! Bless him! *For these three are one.* As I am led by the Holy Spirit, nothing I state is a lie, but the truth of God. Anyone who tells you differently is misinformed or a liar. They do not know God, nor led by him. Anyone who *claims* to be a Christian and is against what I am doing, and where I am doing it; the Holy Spirit does not dwell within them, they lack understanding. They know not God, read his word, and their religion is in vain. Do not hear them, they will mislead you, the lost cannot guide the lost.

[@Call_Upon_YAH]

When you trust in God and cast your cares (worries, anxiety, depression, suicidal thoughts) upon him, they will be NO MORE! Know that there is power in the name Jesus Christ! His name casts out demons and heals! The world is wicked, evil, and of the devil. I too, was a wicked sinner of the world before I opened my heart to God. I am living proof of God's work and fruitfulness! He is an active God who hears the prayers of his! God's children are set apart (holy) and righteous. The devil is a liar that comes to steal, to kill, and to destroy; that includes your relationship with God! Open your heart to God, repent of your sins (he will forgive you), and let him direct your path. Draw nigh to God, and he will draw nigh to you. Cleanse your hands and purify your heart, lest you walk with the devil and follow him to hell.

[@pumkin610]

@@Call_Upon_YAH Hello bot, how ya doin? Also for anxiety, depression, and suicidal thoughts I'd suggests therapy and medication but to each their own

[@Call_Upon_YAH]

@@pumkin610 If you're wrong about me being a bot, how much more do you incorrectly discern? As an infidel, you would choose what you can see over what requires faith. Seek the Lord, lest you perish with all else you see.

[@DaftSandwich]

​@@Call_Upon_YAH Woah settle petal, everyone respects your religion it's just a bit annoying when you push it 🙏

[@nellynn_]

another day, another youtube shorts that explains what my lecturer failed to explain without confusing everyone for 1 hour

[@thend4427]

Everyone shouldn't be teachers lol

[@JohnDoe-og2bt]

Because there are complex reasons behind it. Any idiot can push a button but you have to be a bit more smart to know why you're pushing the button or what it does.

[@NovaSkai]

This channel its just him spiting out a bunch of science words and thats why i subcribed

[@hotaru8309]

If you listen carefully, you can learn the meaning of some just by the video content.

[@mihailmilev9909]

@@hotaru8309 lol

[@vatsalparmar5740]

And sometimes that stuff is basically bullshit

[@HominaHubba]

@@vatsalparmar5740 like what?

[@Nawmps]

@@vatsalparmar5740 ??????

[@Alakay77]

This blows my mind! Thanks for always sharing science in a simple and awesome way!

[@JohnDoe-og2bt]

You're reaching the range that lightwaves can be bigger or smaller than the particle.

[@tomlongworth5387]

You, Nilered, and backyard scientist are some of the most interesting channels for science

[@weirdluck3312]

I didn't understand a thing but that is one of the coolest things I have seen on this channel.... Trust me this channel has a lot of cool things

[@spiderdude2099]

There are tiny spheres of a chemical in each vial. They are SO INCREDIBLY small that they interact with light itself. The size changes how it interacts with light producing different colors.

[@Alex-tu5vu]

@@spiderdude2099 who

[@marioelburro1492]

@@spiderdude2099 ohhh that makes much more sense

[@BlackyWolf1996]

@@spiderdude2099 do you know if it is toxic? :) it wud be cool to try and paint whit :)

[@spiderdude2099]

@@BlackyWolf1996 cadmium selenide is actually extremely toxic. So, only let experienced chemists and electronics engineers apply this for use in consumer products (also, there’s arsenic and germanium compounds in almost every electronic device on the planet so don’t freak out hearing that toxic chemicals are used for consumer goods. Happens all the time. However, it does pose a significant issue for recycling and disposal of electronics as if placed in landfills, or improperly recycled, they absolutely can leach toxic compounds into soils and water.)

[@daliakm178]

This is the most clear and concise explanation of Q dots I’ve ever heard, thank you so much!

[@BanjoCatfish]

Fun fact, cadmium is radioactive ☢️. Also fun fact, cadmium is used in some traditional paint 🎨 colors such cadmium yellow and cadmium red. I asked my old art teacher about the safety of such things and she said so long as you don't get it inside you, you should be fine, so wash your hands really good before eating so you don't ingest it and if you have a cut or open wound maybe wait till the cut heals. Also if you were to use an oil pastel that contains cadmium - pastels are like chalk in that dust from them gets on your work space and if you're not careful it can get on the floor where you're working - and if you have pets like dogs 🐕 or cats 🐱 they might walk through it and then clean their paws 🐾 with their tongue - at which point they just ingested a radioactive material. So don't do that. There is some good news, the paint manufactures make an alternative, you'll have to look into this more to confirm I have my facts straight but it's my understanding that when you see the word "hue" attached to the name of a paint it means that it is a modern synthetic version of a traditional paint color which has had the dangerous ingredients removed. For example, "cadmium yellow hue" does NOT contain cadmium, same with "cadmium red hue" 👍. Hope this helps keep someone safe.

[@briepierce6744]

This comment is so underrated. Thanks for the cool info👌

[@rosemaryalkadi1475]

You are fantastic: you eagerly explain very complex matters in such a way it is easily understood, both verbally and visually. Thanks and keep doing this.

[@yourephenomenal1488]

I don’t know why but I kind of wanna drink those liquids even though I Will die

[@killmeister2271]

Potion

[@smallSphere69]

Health V + knockback III + HoleEnterer IV

[@God-xx9dw]

@@smallSphere69 Sharpness V Knockback III Fire aspect II Looting III Unbreaking III Mending.

[@mihailmilev9909]

@@smallSphere69 😭

[@mihailmilev9909]

@@God-xx9dw they should have a minecraft emoji for this comment

[@tomsterbg8130]

It's so cool to see that such an amazing material is already being used appropriately

[@WillSpengler]

During my PhD I did some work with CdTe QDs. Another fun fact about quantum dots, they are semiconductors. The bandgap of which determines the fluorescence emission wavelength. While this is heavily determined by the size, shape and materials, the bandgap is also influenced by temperature. So these quantum dots change colour with temperature (granted, by fractions of a nm per degree K). We used them to track temperature shifts in optical traps 🙂

[@pragyajain7632]

Heating for long time can degrade our fluorescence and size

[@WolfPacWest420]

I learned more from this Man than I ever learned at school 💯💯

[@austindavis2406]

What's more, is that all kinds of other properties change with particle size. How many times have you heard "Element X has a meeting point of Y" -that's only true if we're talking about bulk material, melting point changes drastically with particle size, we're talking decreases from 1000 C to less than 300 in some cases. Thermal and electrical conductivity can change also. This effect is due to the vastly different surface area to volume ratio. When we're talking particle size over 100nm, there's basically no atoms (comparatively) on the surface, but if we're talking less than a nanometer, it can get to where over 70% of atoms in the particle lie on the surface. As a result, these particles become very surface sensitive and behave novelly. So we have a whole periodic table of elements, but if we play with particle sizes, it's like we create a whole new set of periodic tables.

[@ericeaton2386]

I actually wish it was a much longer video on this, explaining why the different sizes have different optical properties

[@sheastewart7608]

Read about quantum confinement

[@maxmuller2028]

Something similar works with Gold particles. Gold nano particles usually have a red/purple colour and are responsible for the colour of the lines on lateral flow tests.

[@maxmuller2028]

Although those are two different effects, the particle size determines colour. The gold particles in LFTs are colloidal gold, and therefore much bigger in size (40-900 nm). The effect which produces the colour in that case is called Tyndall scattering. The nano particles shown in the video are as mentioned much smaller in size (

[@Juliandaligdig11]

positive energy in this month!!

[@JMark4]

You should do a short on transistors in processors, now being 5nm thanks to AMD

[@sharbelnashar3734]

Hate to spoil it but all those transistor sizes have been nothing but marketing gimmicks for a while now. The actual transistor size is “much” bigger

[@SD-yt9fe]

I think researchers have already built 1 nm transistor.

[@UserOfTheName]

AMD didn't make transistors smaller, they buy fab space from tsmc whos team made the node

[@ahmed-0775]

@@sharbelnashar3734 i wanna know more, i have been lied to all this time. Enlighten me with a video link explanation?

[@DimZelenskey]

That beauty made my day!!! 💐 ❤️ Thank you!

[@westonding8953]

This is great for a chemistry introduction class!

[@elizabetheaton3882]

Very cool Action Lab! Great information thanks

[@kharish]

Guruji thanks for running this Gurukul Another amazing shot from the channel

[@DemonetisedZone]

That is intriguing. Good video👍

[@systempatcher]

I did my undergrad research on this. Good times man, and what an awesome area of research.

[@nihartley5265]

we did an experiment in my chemistry class that was based of this principle. Except we used a reaction to create gold nanoparticle solutions of different sizes and observed the difference in color.

[@Ry_Guy]

This dude always knows how to catch my attention, pretty darn cool

[@curisutabentley8238]

I love your channel, this is the kind of thing that inspires the new generation to get into science, you might have inspired the next Stephen Hawking, that is so cool too. I always enjoy your videos

[@finminder2928]

Quantum’s dot mini OLED is what you are looking for. If you want a good TV that will last you a long time, this isn’t even that expensive.

[@stringbean02]

Currently doing undergraduate research on controlled growth synthesis of CdSe quantum dots

[@TheGamingLegendsOfficial]

I made some of these once. Made gold nanoparticles back in 7th grade. That was super cool, and also gold nanoparticles at the scale we made them at show red!

[@Aamir-2999]

I like your funny words, magic man

[@filip9587]

As the owner of a QLED TV, I'm profoundly in awe at the photosensitive chemical properties of Cadmium Telluride. Such an amazing part of photonics and material science.

[@siddharthpunekar3670]

Thank you for the information you always give🤝🏼

[@jordanjohnson1856]

I have no idea what you're talking about but i know we need more ppl like you... looks cool too

[@scrapironfish]

This is freaking cool! Love Science.

[@fisch37]

An effect similar to this also arises with gold. We all know the yellow-ish colour of solid gold, but in raster electron microscopy (REM) you sometimes coat materials with a single layer of gold to make them conductive. That doesn't tint them yellow though. They instead get a purplish tint.

[@Borgforce]

Am I the only person that thinks “I wonder what they taste like?”

[@EGRJ]

Forbidden food coloring.

[@rproctor83]

Those are quantum dots, they are so small that it would just pass right through your tongue and get absorbed by your bones and lead to early osteoporosis.

[@Borgforce]

@@rproctor83 So… not worth the risk then?

[@unknown431]

@@rproctor83 they go through the tongue so why don't they go through the glass?

[@rproctor83]

@@unknown431 That isn't normal glass in the video, it's nanocrystalline which is the densest form of crystallite structure that even neutrino particles can not pass through. Bones are also a crystallite structure which is why it would lead to some form of bone disease as the material gets trapped in the cellular structures of the bones.

[@evick80]

Love your videos. Thank you! Keep on sharing

[@mpmfr]

“Easlily controlled” 🤣

[@germanyluv]

It really is easily controlled lol.

[@elliottedwards1163]

Cadmium, often used in paint. Creates the “forbidden eats”, as some artists refer to it as

[@jm_sc]

Aight, that's it, I'm following now, you made it. Continue the cool shorts, good job

[@deroberallmann9844]

So cool🔥

[@freddielo4330]

This summarised 1 semester of materials science course in my degree

[@lapaulapau]

My english is basic but this is so beautiful that 2 nanometers on diameter color ahora necesito cadmio telurio Edit: *telururo de cadmio

[@Miguel_Noether]

When a la mitad de la oración te da hueva seguir en inglés y te pasas al español :v

[@lapaulapau]

@@Miguel_Noether hee hee ji ji ji

[@Gnudel]

Ahh so that’s whats in the TV! I swear I’ve read a bookshelf of articles on them, and no one mentions this 🤯❤

[@jondo7680]

Not all TVs have this especially not the cheap ones.

[@bharathchandrakurada999]

Friends 🔥🔥🔥 thug of war the beginning 🔥🔥🔥🔥 short film watch once pls 🥺🥺 If you like it share 👏👏

[@alcoholdonkey]

it's the new thing that's in the TV. welcome to the future.

[@viatueur73]

I love your videos they are really interesting 🤘

[@arghyadipojha5917]

Cadmium Selenide is also beautiful!! 1st nano structure I was introduced to!!

[@mathiassundholm2724]

Quantum Dots are awesome! An even more exciting application is how they can be used in improving efficency of solar panels. By layering quantum dots of different sizes it is possible to capture energy from a bigger part of the light spectrum, so that the bottom layers capture lights that was not captured by the higher layers.

[@Graff-zr3tn]

wow. These videos are the best! Never seen one about this.

[@rmg03c]

That’s also how precious opal displays it’s play of color. 🥰

[@IceCream-qq1pu]

I think this is one of the first I can actually make sense of the explanation haha

[@juanitoaraiza3693]

Yooooo I used to work at the company that manufactured the largest quantities of QD's. I designed parts for the reactor and was heavily involved with R&D. What a wicked burnout.

[@vnelson000]

Why are you not a teacher? There are so many F'd up and 'stalled out' physics and chemistry students out there because of lack of ability to explain a topic. You on the opposite side of the spectrum, are articulate, and concise in description.👏👏👏

[@Shashank-g6i]

Never knew we had such breakthroughs in this technology

[@paths5881]

fun tip: pause the first image of the black powder. shake your phone gently

[@coreym8293]

That's actually mind-blowing 🤯👍

[@saketjoshi4476]

The display technology is why I came to your video after reading the title

[@Prometheushighaf]

Me not understanding half the words he's using: 😮👏

[@Alex-tu5vu]

why?

[@Oxygenationatom]

@@Alex-tu5vu cause he dont

[@spinyslasher6586]

Bruh did you drop out of highschool 🤣

[@createusername6421]

@@spinyslasher6586 yes.

[@AyAy008]

I immediately thought of Samsung QLED TV's once he mentioned quantum dot and color.

[@erikalanreed8198]

The technology behind this is under the non-proliferation treaties. This is a fun thing to know and to use in cool stuff to experiment with, but that unfortunately is kind of where it has to end. If you are interested in using this type of science for an invention or process that you are developing, you should dive in all the way and commit to being an American asset, learn it all. Sound fun?

[@photonik-luminescence]

Really cool ! Another interesting topic 🙂

[@TheOz91]

Can't wait for the tech to mature to get into PV panels commercially. I would love panels that can convert UV to visible light so it's useful to us who live in the tropics where it would rain. Cloud cover still has around 40% of energy in the form of ultraviolet to the ground iirc

[@celestialbunny12]

Aw I worked on a research project at UT Austin on quantum dots during high school! So nostalgic. And yes I chose the project bc it looked cool 😂

[@SnyperMac1]

I have a couple paints that use cadmium as it’s pigment, and they came with a under no circumstances should you ever put this stuff in your mouth attached to the bottle. Like the label on them is actually different from the other paints in the same line

[@sadiaperween2762]

This is the coolest thing i learnt today.

[@t_t9964]

ooo also, Quantum Dots happen when bohr excitation radius is larger (or *close*, i forgot lmao) than the particle size !! Thats why QDs also called as 'like electron' materials because, well, the size is likely 1 atom or an electron.

[@dafe3106]

Not just lcd, there's also qd oled and it's the most amazing display tech there is right now.

[@shamanbrush4024]

I’d always wondered why there was different colors of ‘cadmium’ paint! This is so interesting

[@cosmic_gate476]

I got one of those QD-OLED monitors from Alienware (AW3423DW) and it is absolutely mind blowing. The color gamut and infinite contrast ratio combined with 1000 nits peak brightness (1% window) makes it the best monitor I've ever used by a long shot.

[@JackStarkLabs]

They are the size of molecules, but the size is 'easy' to manipulate and set? Could you make a video on the process of 'quantum dotting'? Or how they are manipulated?

[@mikeyroxxx7875]

I don’t kno how I found this channel but I’m glad I did 👏🏾

[@ericmarc7529]

Your best short vid

[@That_Freedom_Guy]

All the different minerals and compounds that can be found in the earth that have remarkable qualities and characteristics is so interesting! Oh the things we will discover!

[@taylor....]

Quantum Dots:- "8K, hold my Beer"

[@westernpigeon]

i have no idea what he's saying 90% of the time but i enjoy it

[@hriturajdeb2423]

Who is here after noble prize in chemistry 2023🙋🙋

[@ousmanjallow7518]

Beautiful and colorful by nature

[@microcolonel]

The QD chemistry is such a huge advancement.

[@FR0ZENxTUNA]

I see why Nuka-Cola Quantum is called that.

[@kaiffy234]

Pimp particle ☠️☠️

[@anxiousarsonfrog600]

Just curious, what is the liquid that you filled the vials with?

[@duchessofshinies4696]

We just synthesized a bunch of these in pchem lab! Would be cool to have on a shelf if everything they touch didn’t get contaminated with lead.

[@joeorton1218]

Now thats is so dope one color can make so many wow

[@DoubleDsDeliveries]

Nanoparticles are cool my favorite is Cadmium selenide.

[@PolymathAtif]

Thank you. I should pay my tuition to you.

[@chrismcdonald7038]

This is ABSOLUTELY AMAZING SCIENCE, Wow!

[@rraawk00]

science is very cool 💯

[@oxyyy9]

trust me try this one , when the short starts , pause it and see the powder while shaking your phone

[@whothough]

Chemistry is god damn cool, love it (im in College, i think, not in america dont know what my grade would equal to). I love chemistry, my parents hated it in school and werent good at it, but you can do so many cool, usefull or just mindblowing things. If a chemist from now would travel back in time to medival ages, everyone would think he uses black-magic or something. Its such a cool thing

[@suffering69420]

I want to paint using those pretty coloooorrss

[@nemono-won2045]

Your vids ROCK

[@srisudharsrinivasan8336]

* sees the word quantum * I'll stay awake at 3 AM to watch it in loop.

[@Wizard_Gamer_star]

How do quantum dots effect the neurons in the brain?

[@carolmaplesden916]

same

[@elu-in-london]

It's amazing that by changing particle size color changes. That's physical property I guess

[@c.contrafactum584]

Very cool. How do you change the particle’s size?

[@ZayahFeaster]

Interesting how bigger particles produce colors of inversely smaller wavelengths. Like, I'd expect the red to coincidence with the 2nm tube and the green with the 9nm

[@ztoob8898]

Cadmium telluride (CdTe) is a popular material for thin-film solar cells, also. CdTe is a direct-bandgap material, which is what makes it suitable for a thin cell. Silicon, an indirect-bandgap material, has to be many times thicker. The indirect bandgap of silicon makes it a poor choice for an LED. There's a Wiki article on indirect bandgaps if this post isn't boring enough for you.

[@ZaneEckols]

Since the color is dictated by the size of the particles, can the solution's color be changed by heating or cooling it enough?

[@sany_26]

If these are nano particles, Can I become the ant man by using this?