Nanoparticle Sign - Periodic Table of Videos

[creektimothy]

Eek, these videos are too good! I told myself I would go to sleep 5 hours ago. I have learnt so much and the Professor hasthe best humor, very subtle.

[666pecker666]

Brady, when are they going to let you tape lectures and classes. Even if the cam is mounted on the back wall. (less work). You guys are fully aware that many an inquiring mind could never afford University at any level. Hope to see it someday. Thanks for everything so far.

[lampofhell]

If you had a very large amount of Gold, would it appear blue?

[eltotoX]

DUDE I've had that question in my mind for so long. I knew the colour would change :D

[rathat48]

Whos in charge of the youtube channel and the one who makes the comments? for some reason, I always thought it was pete.

[nirvana9610]

how to make 13 nm in diameter particles?

[alphatelescopii]

twenty not 2000!!! (twenty-eleven)

[punkapie95]

!!! Marie Curie looks a little like Abigail Breslin might in a couple decades heeheehee

[anticorncob6]

If atoms are the basic building blocks of matter, what are the basic building blocks of energy? Someone please answer and thank-you.

[satan31337]

@anticorncob6 ions, protons, nutrons

[anticorncob6]

@satan31337 You go like this:

1)atoms 2)protons, neutrons  3)electrons and quarks 4)strings (if string-theory is correct)

Light and sound are not made up of ions, protons, and neutrons (ions are just atoms with a different number of electrons; you're saying energy is matter). In case you didn't realize, I didn't ask what atoms were made of, I was asking what ENERGY is made of.

[Furiouslyfappin]

@anticorncob6 Energy in the sense of electricity or in the broader sense of energy as a force? In electricity it is the free flow of electrons. However as a force, that's a little more complicated question. If you know Einstein was the first to say that energy and mass are the thing in different manifestations, mass is energy. Without an understanding of mass-energy equivalence it doesn't make much sense. Go to sixty symbols!

[pyrioni]

turn gold into purple is such a waste, why not turn iodine into gold colour that would be awesome!!

[pyrioni]

then with the same process, you can make gold colour out of ordinary cheap atoms! Then we don't need gold anymore, right?

[BYMYSYD]

I think that is a good place to hang it.

[carloldelpizzo]

I LOVE all of the professor's analogies! :D

Cherry's in a cake.

[slartibartfarst]

Brady, are you planning to do an 'any questions' series like you did with 60 Symbols?

[periodicvideos]

@slartibartfarst Hi, I'm sure we'll do it at some stage... Between elements, molecules and the new chem definitions... we already have some Q and A videos with school students, but we'll do it with the YouTubers in the near future!

[helliop]

amazing!

[christhecurler]

I have a question...If the colour of a substance is produced by photons of certain wavelengths causing electrons to jump to a higher energy state by absorbing those photons, what happens when the electrons fall back to their previous energy level? Would it give off the same colour it absorbed?

[anticorncob6]

@christhecurler No, it would not give off the same color it absorbed. It would go to reflecting the previous color.

[Clairenna]

This is also the reason why pink glass is the most expensive (for instance when choosing colours to make stain glass windows) because it requires gold.

[ThePurpleBus]

Very cool gift!

[vhiechava]

whoa! i learn a lot from this video, thanks. so interesting... whoaa! gold in purple..cool!

[periodicvideos]

@vhiechava glad you liked it!

[johnjaksic61]

Absolutely genius!

[Intervene]

Great stuff!!

[DJBigz1988]

thats a very clever way of doing something that seems simple but isnt.

[kpshc707]

u guys should make a video explains those Lichtenberg figures this is what im talking about: /watch?v=xoKloJwmLjI&feature=r­elated

[yoshinibble123]

I'm thinking of applying to Nottingham as an undergraduate :)

[culwin]

It's so sad when he says he can't afford gold :(

[09fod]

gold is only like 37 gbp a gram lol

[mightyfinejonboy]

so as a paint sprayer i am not perhaps overwhelmed, should i be? some of the latest pearl and metal flakes tinters are £2k+ per litre i suspect may be very similar?? also a analogy would be blood , is it normally yellow, but red due to the volume??

regards jon

[BMGrid]

@mightyfinejonboy The red colour is due to the iron in the haemoglobin, which becomes a brighter shade of red as oxyhaemoglobin content rises. However, without red blood cells the plasma/platelets/white cells do indeed look yellow.

Reducing a particle's size in all spacial dimensions (quantum confinement) produces a 1D quantum dot, which often has vastly different properties to the bulk matter. One of these properties is the wavelength (ie energy) of absorbed light, hence the colour change.

[G3org3Master]

@mightyfinejonboy Alien blood is yellow :P

[Pygar2]

@mightyfinejonboy Finely divided yellow particles scatter and "lose" yellow light, thus making it look red. That is why straw-colored blood cells make a red liquid. It is also why (very expensive!) red glass used to be made by adding gold!

[bemanos12345]

nice

[dylanlawless1]

i'd love get get cool science stuff like that for presents, unfortunately anyone who'd be giving me a gift wouldn't be into it ha

[Danthaman1971]

Ain't the professor cool?...

[mrbenboy77]

Cant afford gold

[dajwilkinson]

@mrbenboy77 Even 10,000 atoms of it LOL

[B00Cwis]

Well, I learned something new yet again! The color changing process is pretty neat.

And you should hang it in your door's window. It seems to fit perfectly!

[whatevtube]

Great present!!!

[L00NGB00W]

Nice sign!

It is quite fascinating how these colour changes occur with particle size.

I've noticed that when aluminium is finely divided, it goes from a nice shiny metal, to something that looks like powdered graphite or soot.

[TerranOutpost]

PBS's Nova did an episode that included nano-particles as color in stained glass.

the episode is called Making Stuff: Smaller. You can view it online, but youtube wont let me post the link.

[OurFadedGarden]

If possible, he should make the background black and the outline of the letters white. It would have more punch.

[huntingvuk]

way cool! love your videos,

[MattDoesNotRock]

his office seems like it's jam packed full of interesting things

[mamece2]

so.. size matters in chemistry!

[andycapo123]

I am very honoured that you have made a video about my display. The size of the gold and silver nanoparticles are about 13 nm in diameter and each nanoparticle is made of many (more than 500000) atoms.

Andres

display

[Cambenora]

@andycapo123 Well, that was pretty cool. The work that is (though the video is cool as well).

What did you use for the borders?

[andycapo123]

Hi I used something called black liquid leading used for making stained glass.

Andres

[Cambenora]

@andycapo123 Aha. I thought I recognised it.

[periodicvideos]

@andycapo123 well thanks again for sending it... very cool!

[Alex77Fox]

@andycapo123 Awesome sign!

[mvszao]

I knew the purple one was made of gold. I don't know why, but I'm sure I've learnt watching periodic table of videos

[periodicvideos]

@mvszao yes, out video called "Extra Bits of Gold" showed red nanoparticles! I''ll post it here as a video response.

[imafirinmalaser]

God I love this proff.... Also, I wouldn't mind my car coated in the gold nano-particle paint ;)

[shams582]

The result of this mix:particles and plastic is great!Really interesting concept of coulor and size of particles. Greetings!!

[Pipination]

I think the real question is what's the change in Young's modulus for the gold-polymer nanocomposite? :-P

[MidnightRedemption]

uh.. lala!!

[lmola501]

purple gold ftw

[OpiatedBliss]

Thru the post you say? ee gad!

[aCagedApe]

i like the ending

[alanjtory]

Hah. After a night of doing homework I procrastinated on (it's 4AM where I live), I'm treated to one last video before I go to bed :)

[godulous]

What a wonderful gift to receive, thanks for sharing.

[VonLeachim]

very interesting, thank you - though, it worries me a little 'nano tech'

[ngu0061]

great place to hang it

[guitardbucket]

Cherries in a cake? I want cherries in a cake.

[Doriide]

Does he ever clean his office? And purple gold... I wonder what a nanoparticle of copper looks like?

[YamiPoyo]

@Doriide I think it was an orange color.

[francocrs]

the year 20011?

[TheRealAndrewJackson]

@francocrs sshhhh.... don't tell anybody we've travelled through time, we're trying to keep it secret.

[periodicvideos]

@francocrs ha ha... it had been a long day... but not that long!!! fixed now!

[Mees401]

@francocrs No, 2011

[BeAnBeAn22]

COOOOOOOOL! where can i buy the plastic?

[DREADwinss]

Great video yet again! ^^

[nc17atnce101]

inhaling nano particles seems dangerous!

[miphisto55]

Awesome, 2nd :D.

[Justpooinabush]

Wooo first :D Keep up the good vids guys! x