Gold Nanoparticle - Sixty Symbols

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  • Опубліковано 14 кві 2011
  • We take a very close look at a very small speck of gold.
    With Philip Moriarty
    More physics at www.sixtysymbols.com/
  • Наука та технологія

КОМЕНТАРІ • 390

  • @ObjectManipulator
    @ObjectManipulator 12 років тому +4

    The first one was "A cow to a physicist is basically just a large sphere, sometimes you consider the tail, sometimes you don't." And his analogy for the size of one quintillion was "You'd require a 20 meter deep pile of Maltesers, which spread out over an area the size of Ireland" Hope that helps! :D

  • @frederf3227
    @frederf3227 9 років тому +3

    I remember a professor once rattling off a calculation of "2 times pi, that's ten. Ten times fifteen that's 100, etc." All the operations were that sloppy and in the end the answer had something like 15 zeroes and the sloppy version was only 20% off the careful one.

  • @yellowmetalcyborg
    @yellowmetalcyborg 13 років тому +3

    The awesome thing about looking at gold nanoparticles is that you don't have to plate them in gold in order to see them in an electron microscope.

  • @rioross
    @rioross 11 років тому +2

    I've only had those chocolate candies on his desk once in my life. They don't sell them here in Minnesota, or anywhere in the US, but I can tell you, they are absolutely fantastic.

  • @RavenMad101
    @RavenMad101 11 років тому +2

    So Cool, You can really see the structure of the Nanoparticle and a very gridlike structure when you look close.

  • @tonyhart97
    @tonyhart97 6 років тому +3

    I first watch this video when I was about 16 and was fascinated and now I'm doing my degree in nanotechnology and only a few weeks ago we made both Au and Ag NPS, it's cool to rewatch this video and see how far both I and the field have come in seven years

  • @24938839
    @24938839 8 років тому +141

    I like the fact that he thinks americans know the size of Indiana

    • @fudgelame
      @fudgelame 6 років тому +1

      Ireland probs understandable than Indiana.

    • @VeggyZ
      @VeggyZ 6 років тому +1

      I think (hope) everyone watching this video knows at the very least that Indiana is roughly the same size as Ireland.
      Quite the mind-trip. But it's just an approximation.

    • @randellporter8747
      @randellporter8747 6 років тому

      Lactose69: Your a pompous idiot. I'm guessing a13 year old pompous idiot.

    • @-yeme-
      @-yeme- 6 років тому +1

      VeggyZ I had no idea how big Indiana was, or where it was until I looked just now. I knew it was a state and I was sure it wasnt one of the huge ones in the west but that was all. I wonder how many Americans would know how big the county of Devon, where I live, is, or be able to point it out on a map. A minority, I would imagine, and probably a small one.

    • @666wurm
      @666wurm 6 років тому +2

      Indian 94.321 km², Ireland 84.421 km² - that is 11.7% off! Ridiculous!

  • @lasseankerfrederiksen2285
    @lasseankerfrederiksen2285 8 років тому +13

    I love to see this guy. he really gets so existed when he explains

  • @Derundurel
    @Derundurel 9 років тому +2

    I completely agree about people being uncomfortable with inexact quantities. Engineering is full of this sort of thing too - everything has a level of uncertainty attached. Sometimes an order of magnitude answer is sufficient.

  • @brianwilson9501
    @brianwilson9501 5 років тому +4

    His energy is awesome. He would be a great teacher. Wish my teachers had half the energy he has.

  • @Diamonddavej
    @Diamonddavej 13 років тому +3

    Notice that colloidal gold is red?
    The ancient Egyptians were the first to make used gold nanopartices to color glass red (Ruby Glass) and in the 4th century, the Roman artisans used gold particles 6 nanometers wide to color the glass of Lycurgus Cup red.
    In 1908, Gustav Mie explained how colloidal Gold produce Ruby Glass, Mie Theory, localized surface plasmon oscillations on the surface of metal nanoparticles.

  • @publiusdg
    @publiusdg 12 років тому +2

    I hope I'll be as excited as this guy in my future job. He makes his job look so fun.

  • @habichturs4427
    @habichturs4427 11 років тому +2

    You see a detail of a metal mesh (usually Cu) purpose-made to hold thin foils or layers for TEM investigations. It is covered with a thin film of amorphopus carbon (a "holey carbon film"). The only thing you have to do is, get the gold particles nicely dispersed in their suspension (use an ultra-sound bath), and then let a droplet of that suspension dry on the TEM grid with the carbon film. Then put it into the TEM specimen holder, put that into the TEM, and you're ready to image .

  • @TrueEmergence
    @TrueEmergence 13 років тому +2

    Oh my god. This channel is one of my favorites thusfar. Thank you so much for the posts.

  • @Maverician
    @Maverician 8 років тому +9

    5:33 is amazing to keep clicking back to...
    Sorry Prof Moriarty.

  • @habichturs4427
    @habichturs4427 11 років тому +2

    One correction: In a typical TEM, the wavelength of the transmeitted electrons is not of the order of magnitude of the interatomic distances (or the distances of the lattice planes), but about two orders smaller. While phycisists are not always very exact, a ratio of just one order is usually described as much smaller, let alone two orders.

  • @1646Alex
    @1646Alex 11 років тому +2

    yeah, i know. but, i've really wanted to get into theoretical physics for like my whole life, but i've always sticked to more piratical carers, but this video has motivated me to become one.

  • @zantrua
    @zantrua 11 років тому +2

    I love how he holds up the paper for pretty much the whole interview. He's so excited haha

  • @rushianokun
    @rushianokun 13 років тому +1

    I LOVE this guy, please feature him again!

  • @luis5d6b
    @luis5d6b 11 років тому +1

    Honestly I would love to get a physic class with this guy or any of the guys from sixty simbols I really love to see when someone gives a class and really enjoys what he or she is teaching as much as I love learnig and it good with getting a lot of questions and intelectual debate about the subjects and this guys seems great, love this videos

  • @codykonior
    @codykonior 13 років тому +2

    I'd have liked some extra explanation on why nanoparticles are important. Perhaps a future episode? :-)

  • @Musicguy208
    @Musicguy208 13 років тому +1

    Always awesome! I love these videos!

  • @brandonX360
    @brandonX360 13 років тому +2

    Sixty Symbols is always good fun to watch!

  • @AVJRoutledge
    @AVJRoutledge 13 років тому +1

    I’m very addicted to all these. One question for anyone who knows the answer!!
    How much more powerful are these microscopes going to get?
    Have they reached a critical limit?
    Are there new ones coming out?
    Will they continue to be refined?
    Are we going to get even more detail?

  • @habichturs4427
    @habichturs4427 11 років тому +1

    Yep, that estimate is about right. The TEM image is in simple terms a projected view of the crystal (not like your optical vision of some macroscopic object), so unless the columns of atoms are not aligned to the direction in which the electrons travel you can't see them separated. At 00:10 you see in one part of the crystal a stripe pattern which means that the electrons travelled parallel to planes of atoms (to be exact: parallel to planes far enough apart to be resolved by the microscope).

  • @vanessacherche6393
    @vanessacherche6393 9 років тому +10

    Excellent choice for random cd on bookshelf!

  • @tomrich553
    @tomrich553 13 років тому +1

    i made these at my high school as well! it was incredibly fun, and because of it i plan to study nanotech at Leeds next year!

  • @michaelguckian5373
    @michaelguckian5373 7 років тому +4

    Have you / can you run some high speed camera imagining at the the nano scale. Maybe we can see movement of patricles image how quick things are moving at this scale.

  • @richardfrieman
    @richardfrieman 6 років тому +2

    I know I'm like 7 years late, but the statement about crystal faces was flawed. Although it's true that Diamonds have crystalline structure, we never see it grow out. Raw diamonds are rough because they grow within a matrix of ultrabasic magma that formed within Earth's mantle. They then get eroded out at the surface where they are subsequently found often on beaches of oceans and rivers. The facets that we see on diamonds are cut and polished by humans. Quartz would have been a better analog; when quartz is allowed to grow in a void, it forms beautiful obelisk shapes with naturally occurring crystal faces like those on the gold nanoparticle.

  • @borandiUK
    @borandiUK 10 років тому +5

    Shame he didn't start talking about the quantum dot effect, and that different sizes of gold nanoparticles produce different colours.

  • @bwub1
    @bwub1 11 років тому +1

    Actually theyre already being used for some data sorage devices. Not in solution but attached to surfaces. There are loads of cool things you can do with nanoparticles. There are plenty of ways of making them too. Most of the chemistry is fairly simple so you can make them in a lab in an afternoon. Observing them is tricky becuse they're so small, but again there is about a dozen good techniques you can use to get an aproximation of their size and shape.

  • @Dracanic
    @Dracanic 13 років тому +1

    I absolutely love this series. My goal is to get a physics degree and this channel is keeping that dream alive

  • @w00td00t
    @w00td00t 13 років тому +1

    Awesome name, awesome taste in music, awesome profession. What isn't awesome about this guy?

  • @RockMedved
    @RockMedved 13 років тому +1

    This is my favorite sixtysymbols guy.
    BTW I rather enjoyed the envelope part, since about 90% of my Maths calculations are all across my bills and envelopes too :D

  • @Waltham1892
    @Waltham1892 13 років тому +1

    If only every student could have a teacher like this...

  • @youarebeyondthought
    @youarebeyondthought 13 років тому +1

    God I love these videos. Thank you so much!

  • @talk74
    @talk74 13 років тому

    A great way to start my Saturday morning...cheers!

  • @DrScully25
    @DrScully25 9 років тому +1

    I got so wound up and excited watching this haha

  • @RM_RM_RM
    @RM_RM_RM Рік тому

    Very beautiful 5-fold twin of gold

  • @singlespies
    @singlespies 13 років тому +1

    I am most interested in the imaging process and enjoyed the explanation of the "lines" in the image of the nanoparticle. Was wondering if light cannot be used to image things that small and why...

  • @sniped101
    @sniped101 12 років тому +1

    If I had one of these guys as a teacher when I was in middle or even highschool, I'd probably be a physics major..

  • @FunnyHacks
    @FunnyHacks 13 років тому

    A fantastic talk!

  • @BobStinkfulla
    @BobStinkfulla 13 років тому

    @AVJRoutledge Electron Microscopes such as the one used to capture the pictures for this study are still being refined, but are approaching the limit of their resolution. This arises from the nature of the electron source used and from the inaccuracies in producing the electromagnetic lenses required to operate the instrument. Other types of microscopes, such as Atomic Force Microscopes of Scanning Tunnelling Microscopes are also capable of achieving atomic resolution and are being improved.

  • @JustinRiedyk
    @JustinRiedyk 12 років тому +1

    It's mind blowing that the tiny particle is still 120,000 atoms.

  • @cristianfcao
    @cristianfcao 13 років тому +1

    Some weeks ago I've learned how many atoms are in a grain of salt.
    Are you ready?
    About 1.2 *10 ^ 18, or: 1,200,000,000,000,000,000 atoms!!
    That fact alone multiplied my admiration for particle physicists by at least a billion. :-)
    I mean how is it possible to study something so unimaginable small? That there are protons, neutrons and electrons, which are so much smaller than the atom itself, and then quarks within the protons and neutrons that are smaller still!!

  • @GeneralVariety
    @GeneralVariety 13 років тому

    these videos are so interesting!

  • @beeble2003
    @beeble2003 11 років тому

    I was talking about average speed, not top speed. My point was about errors in measurement: it doesn't make sense to quote the average speed to five significant figures when you've only measured things to three.

  • @ramonbril
    @ramonbril 13 років тому

    @calmo15
    It is not the diffraction that stores information, it is just that the difference between two lines of holes in the cd is about the wavelength of light. Though you can store information on nano particles if you hold the capability to write and read on that level.

  • @FalcoGer
    @FalcoGer 11 років тому

    the wavelength of the electrons that were used to make that image...
    i wasn't even suprised to hear that anymore, i even guessed that before you said it

  • @arothn89
    @arothn89 12 років тому +1

    queens of the stone age, this guy just keeps getting cooler!!

  • @gulllars
    @gulllars 13 років тому

    @Robaaaayy it's like the quote from the theme song of flashdance, "Take your passion and make it happen".
    I was almost through the second year of chemistry in university when it hit me although i was skilled at it, i didn't have a passion for it, and my passion for computers, which had always been a hobby, had grown to the point i decided to do just that, make it happen. It feels like comming home without ever knowing you weren't there already, but at the same time deciding to do so is scary.

  • @IRuinEvrything
    @IRuinEvrything 11 років тому

    i don't know if there's a tech term for it, but I refer to it as proportional rounding. you have to round everything at its own scale. I imagine you can't really do it until you have a significant amount of intuition with the numeric behavior of a given quantity/quality. some things you round down, others you round up to bal out the behavior of the thing that was rounded down.

  • @krazedgunner
    @krazedgunner 12 років тому +1

    I love videos like this, im getting interesting just learning about it. can I ask you about that electron microscope? is it over $15 grand :)

  • @evilferris
    @evilferris 13 років тому +6

    @ThermalHD
    $52 per g; current gold price in grams
    197 g in a mole
    6.023×10^23 atoms in a mole
    125,000 atoms/particle or 1.25×10^5 atoms
    (1.25×10^5) / (6.023×10^23)= 2.075×10^-19 mole
    (2.075 × 10^(-19) × 197g = 4.088 × 10^(-17)g
    4.088 × 10^(-17) × $52 = $2.13 × 10^(-15) or
    $.00000000000000213
    Somebody check my math?

    • @zeryphex
      @zeryphex 5 років тому

      @evilferris
      I'm sure your math is ok ... but there could be billions of dollars made from collecting gold particles in all the world's oceans ... and plenty of gold from recovery in electronics waste.

    • @teyton90
      @teyton90 5 років тому

      i'm sure it's ok, since you had 7 years to figure it out

  • @consummateVssss
    @consummateVssss 13 років тому

    @singlespies the nano particles are only about 20 nm in diameter and the best resolution of visible light is about 200 nm, but as to why I think it must have something to do with the same mechanism as a single slit laser defraction so to use technical phrasing the light would do funky stuff at that scale

  • @vevenaneathna
    @vevenaneathna 12 років тому +1

    maybe nano particles could be a viable medium for recording data due to the refraction of electrons.
    If only we were better at making them and had a way of easily observing them

  • @e1doller
    @e1doller 13 років тому

    @isreasontaboo you can create these using a gold salt and trisodium citrate to reduce it. the lee and misel method is pretty well known.

  • @MindLessWiz
    @MindLessWiz 13 років тому

    Awesome! I didn't realize that about CD's. That's good to know.

  • @ifsey
    @ifsey 13 років тому

    4:12 Some nice product placement there! Malteasers- Food for thought!

  • @NordicLab
    @NordicLab 12 років тому

    @DoctorFastest I use a laser at 720 nm wavelength for DLS. According to his passport instrument measures the size of 0.8 nm. But if he could see the separate particles, I do not know. At least I got it a size of 3-5 nm with mixed peaks.

  • @criddell86
    @criddell86 13 років тому +2

    Possibilities of electrons being used to read/write to the surface of nano particles to store data in large volumes?

  • @HeavenlyTennyo
    @HeavenlyTennyo 8 років тому

    I'm going to use the phrase "back of an envelope calculations" because I'm often doing the exact same thing myself!

  • @adeel256
    @adeel256 11 років тому +1

    love the little diversion. that's what makes it human. beautiful!

  • @DoctorFastest
    @DoctorFastest 12 років тому +1

    @MrChemify My understanding is they use electrons because of the short wavelength. The problem with using DLS on something like this would be scattering off of multiple particles within a single wavelength, complicating the interpretation of the scattering significantly. I'm not an expert, but I'd be surprised if DLS worked on these scales. I know that it's useful for larger stuff, like proteins, polymers, etc.

  • @dezerterone
    @dezerterone 9 років тому +2

    'Restricted' - good choice! :)

  • @PacRimJim
    @PacRimJim 9 років тому

    It's not necessary to compute exactly, but it is essential to know how to compute exactly.

  • @SkepticalBliss
    @SkepticalBliss 13 років тому

    Fascinating !!!

  • @Confuseddave
    @Confuseddave 7 років тому +3

    I thought the SI unit for large size comparisons was Wales.

  • @subach
    @subach 13 років тому

    I do the same thing when I need to do a side calculation I just grab the nearest thing I can write on. No envelopes, but I've written equations on a few Chinese food menus.

  • @Akashic_Monk
    @Akashic_Monk Рік тому

    amazing content

  • @Jumiconnard
    @Jumiconnard 12 років тому +1

    It looks like it has a 5-fold simmetry, just like quasicrystals :o

  • @hd-fractals
    @hd-fractals 13 років тому

    I do like a good magnification!

  • @mathie92
    @mathie92 13 років тому

    that was the first thing i learned at university make guesses and approximations that was our first lesson physics

  • @belliebum12
    @belliebum12 12 років тому

    Living in the U.S., I appreciate the comparison change to one of the states. The problem is, I have little idea as to how big Indiana is... I should know this but I don't. Indiana's just one of those states that doesn't have anything that distinguishes it from the other states. Apologies to those living in Indiana.

  • @experthe9574
    @experthe9574 13 років тому

    This is such a coincidence, because just a few days ago I made gold nano particles for a class as well.

  • @Goodwithwood69
    @Goodwithwood69 9 років тому +4

    QOTSA best album by far!

  • @llewkcornosaj
    @llewkcornosaj 10 років тому +8

    queens of the stone age rule!

  • @habichturs4427
    @habichturs4427 11 років тому +1

    Forget about your imagination of "size of an atom". All what matters here is the electric potential which deflects the electrons, in other words, affects the phase of the wave of the fast transmitted electrons. Gold atoms have a high Z (large charge in the nucleus) meaning they have a high scattering cross-section. You could detect an individual Au atom with a good TEM (better with a STEM). However, it is energetically so favourable for the atoms to stick together that none would separate).

    • @bbbilge
      @bbbilge 6 років тому

      Doğada ALTIN zaten en çok sularımızda iyonize halde bulunmakta tüm canlıların metobolizmalarına dahil olmaktadır. Paradan farklı olarak altın iyonize olarak yenilebilir ve etkileri gerçeküstü gerçeklik ötesidir. DMT ruh ya da tanrı molekülü sentezlenmesinde metabolik olarak işlevseldir.
      İki Türk bilim insanı suda iyonize halde bulunan altın atomlarını virüsleri genetik olarak yeniden modifiye ederek toplamayı başarmışlardır. Bu süreç başta akıllı yaşam türleri olmak üzere dünya üzerindeki canlı yaşam türleri ve beyin sinir aktivasyonları için uzun vadede geri dönülemez etkilere neden olabilir.

  • @JuanLeTwnz
    @JuanLeTwnz 13 років тому

    I really didn't expect him to take Rated R out of the cupboard.
    Makes me want to give this vid 1 quintillion thumbs up :)

  • @NordicLab
    @NordicLab 12 років тому

    which were obtained by these particles? Are there studies using dynamic light scattering?

  • @BruceNJeffAreMyFlies
    @BruceNJeffAreMyFlies 12 років тому

    Yeeeeesss!!! Moriarty listens to Queens of the Stone Age.
    What a legendary physicist!

  • @TheKitch2
    @TheKitch2 12 років тому

    My thesis for my degree is about producing AuNPs using fungi, its really interesting, and even more so, now that I have a better idea about gold nanoparticles!!!

  • @1vrsc
    @1vrsc 11 років тому +1

    awesome stuff! American Idol zombies don't know what they are missing...should be watching things such as this. This is where real talent is...science

  • @bigboam
    @bigboam 11 років тому +1

    My question is: does all of that rounding ultimately create minor errors? i.e. are we (ever so slightly) miscalculating the orbits of planets, etc., by rounding to three or four significant decimal figures?

  • @jerommeke69
    @jerommeke69 13 років тому

    @singlespies
    nope, light cannot be used.
    Look up "angular resolution" on Wikipedia to learn why!

  • @120Luis
    @120Luis 5 років тому

    Nice, that was Rated R, the best one of their albums

  • @afhdfh
    @afhdfh 13 років тому

    I love how he says "faces"!!!

  • @dailyforman
    @dailyforman 13 років тому

    amazing

  • @balayanr
    @balayanr 9 років тому

    Nice Rated R cd, Prof!

  • @sharonwoodward2316
    @sharonwoodward2316 11 років тому

    He does have good taste in music!

  • @ibengmainee
    @ibengmainee 9 років тому +29

    All I learned from this video is that I really want some Maltesers while listening to Queens of the Stone Age...

  • @djangogeek
    @djangogeek 8 років тому +1

    +Philip Moriarty
    So are the diffraction patterns from the electrons scattering constructive interference?

    • @robinswamidasan
      @robinswamidasan 5 років тому

      Alternating constructive and destructive interference.

  • @calmo15
    @calmo15 13 років тому

    if the nanoparticle diffracts electrons in the same way that CDs diffract light, would it be possible to store information on the and make like a nano hard drive?

  • @willwoodhouse
    @willwoodhouse 13 років тому

    @Agemrepus yeah it would but a lot of measuring equipment isn't actually accurate enough to measure that precisely, so its usually best to stick to relatively few D.P.s

  • @svenhoek
    @svenhoek 10 років тому

    I was so hoping that the album Prof. Phil pulled from the shelf would be "This is Spinal Tap" (The Digital Remaster)....
    It was the rock and roll creation
    It was a terrible big bang
    It was the ultimate mutation
    Ying was searching for his yang
    And he looked and he saw that it was good!!!

  • @jgordon707
    @jgordon707 13 років тому

    @Shoyrou Thanks for responding. I made the comment before he explained it. Thanks for helping.

  • @HallowedError
    @HallowedError 13 років тому

    I love QotSA! Interesting video too

  • @Eliphas_Leary
    @Eliphas_Leary 13 років тому +1

    Whenever I see Professor Moriarty in these videos I expect Sherlock Holmes to suddenly show up...

  • @calmo15
    @calmo15 13 років тому

    @Brillyr thats what im saying, could you use the diffraction patterns to read the information?

  • @jukechuu
    @jukechuu 4 роки тому

    I love how every 10th comment is about Queens of the Stone Age, couldn't have picked a better album from his collection