Copper nanoparticles for conductive inks by water and polyol synthesis

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  • Опубліковано 6 лют 2025
  • The three main papers for this are
    in situ monitoring of flash light sintering of copper nanoparticle ink for printed electronics
    Hwang, Chung, Kim
    Nanotachnology 23 (2012) doi: 10.1088/0957-4484/23/48/485205
    Microwave assisted polyol synthesis of Cu nanoparticles
    Blosi, Albonetti, Dondi, Martelli, Baldi
    Journal of Nanoperticle Research (2011) 13:127-138
    doi: 10.1007/s11051-010-0010-7
    One step green route to narrowly dispersed copper nanocrystals
    Wu, Mosher, Zeng
    Journal of Nanoperticle Research (2006) 8:965-969
    doi: 10.1007/s11051-005-9065-2
    so if you want to read up and follow this stuff by all means do. If not you can just follow the recipes and make you own copper nanoparticles for inkjet printing of electronics.

КОМЕНТАРІ • 92

  • @KyleCPM
    @KyleCPM 8 років тому +3

    GReat Info Rob; Thank You for your pioneering and sharing of such critically useful methods and materials, with the rest of the world.

  • @CPedersen2012
    @CPedersen2012 10 років тому +2

    Absolutely brilliant.
    I spent more than 4 months working on this to not as good results...

  • @robinconnelly6079
    @robinconnelly6079 Місяць тому

    Great stuff.
    But what is really needed to actually be useful in all applications is a conductive GLUE. Something that hardens and is strong enough to withstand a bit of movement on the connected parts. Something that could sort-of replace solder.
    Inks are great for drawing circuits and educational things, plating plastic items etc. And, no doubt some industrial things.
    I am busy with a repair of an electronic music keyboard. Trying to join flexible PCB. 🙈. There is just nothing out there. The silver glues are HIDEOUSLY expensive. I ordered a syringe with a couple of mils in it and, it not only was not strong enough ( a little pressure and it just cracks), but it dissolved the tracks on the PCB! And it was then run out and I would have had to order another batch to try again. 🙈
    I have since been working on carbon based inks and I have achieved something not too bad. On average I can get about 100 ohms in a join which will work for some things.
    So maybe you can come up with a glue formula. That would be fantastic
    Good luck with your endeavors.

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    The polyol synthesis is really useful mate

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Absolutely it would be good for iron cobalt bi metallic particles too

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    You certainly should you have the right approach

  • @sianbarnett1000
    @sianbarnett1000 3 місяці тому

    Wonder what happens if copper and graphine meet, would cu fit into the matrix? Copper is used to check mixing in secondary steelmaking units like degassers, a tiny addition disperses through the molten charge extremely quickly, samples taken to see if there’s dead spots or non homogeneous ladle.
    Also grapheme and Babbitt metal bearings, still used in big end shells ( white metal on steel shoe)

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Cheers mate

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому +1

    Too much to do lol - sulphur batteries have been on my mind too

  • @cedricproper5256
    @cedricproper5256 2 роки тому

    Does the stirring magnetic field bear any influence on the reaction of the nano copper with regards to electrochemistry? I'm guessing that the insulating component would have some type of buffering effect which keeps the nanoparticles small as you have indicated earlier in this video. Could the magnetic stirring be reproduced without the magnetic field and produce the same results? Thank you for publishing this experiment. It has me wildly curious.

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    It should, I reckon.. just want to say cheers for your VERY informative videos :)))

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    lol - it's by ratio of weight of monomer - otherwise you would be chucking tons in there - redo with monomer weight - aggregation - could be because of many things lack of process control but more likely from what you said about PVP ratios i guess insufficient PVP

  • @MYNICEEV
    @MYNICEEV 11 років тому +1

    Great video. I watched but only understood some of the information. But I was able to follow the process quite easily. I am looking forward to you using it as an ink. Do you have printer that you can use for these experiments? Or are you gingerly using your main printer? Thanks as always for sharing.

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому +1

    No, I tried it lol. Then I realised it was a cold cathode light. So, thought it is bright it doesn't have nearly the same energy as xenon flash

  • @mauriliosantosjunior
    @mauriliosantosjunior 11 років тому

    Great work. Thank you...

  • @201_11วรากรคําแปง

    If we want it in powder form, what should we do next?

  • @magnuswootton6181
    @magnuswootton6181 9 місяців тому

    its the colour of the metal already!!!

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Say I gave you a bag of apples and a scale and the weight of one apple and asked you to tell me the number of apples in the bag - I'm pretty sure you could do it. It would be the weight of the bag divided by the weight of the single apple. It's like that with atoms. Molar mass is just the weight of 6x10 to the power of 23 atoms of that particular substance (or molecules) so though it seems to be a mass it isn't really it has nothing to do with density - it is just a number - hope this helps

  • @petevenuti7355
    @petevenuti7355 3 роки тому

    Do you know if you made Chevreul's salt instead? The complex has a similar appearance. ... the so4 got reduced to so3 instead of the copper to metal? How would one check in a kitchen lab?

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    I'm not sure I'd have to check

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому +1

    I'm sorry my friend but why on earth would the k value be of any interest here? Molarity is to do with number. It is 6x10 to the power of 23 atoms - that's it and that is a mole. Stick that number of atoms in a liter solvent and you get a molar solution. Half that number in a lire is half molar. Half that number in a half liter is a molar solution and so on. The problems arise because different atoms are different weights. But that's easy to understand 10 cars are heavier than 10 bicycles

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    I'll try sometime

  • @agentbertram4769
    @agentbertram4769 7 років тому

    Most interesting... As always Rob. We are in your debt.

  • @NoahKainWhittington
    @NoahKainWhittington Рік тому

    Do you think an infra red laser would sinter it as well? Or is the flash the only method?

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    I just looked into it Li can be.. (LiCH2CH2CH2NMe2)4 *perfect* and without O2 around during reduction, it would make nice Li nanoparticles .. there was a paper and video I just remembered, showing a Li-ion microbattery being 3D printed in the US, University of llinois I think.. Wild, I think I understand how that could be built from scratch now :)) next one to figure out would be the new Li+/Sulphur/MWCNT types.

  • @mhatima5974
    @mhatima5974 11 років тому

    Hi Robert, sorry i am not polymer chemist, still i have got problem in calculating the mass of pvp for a given cncentration, i tried my best to calculate the mass of PVP using monomer mass that is 0.08 X 112.9g/mol which is 9g of PVP for 100mL, i'm right? do we use this calculation for all PVP, i mean no mater which k-value we use

  • @editthlh
    @editthlh 8 років тому

    Thank you

  • @andreweden8041
    @andreweden8041 4 роки тому

    Hi Robert, I love your channel, its a really great contribution to science in my opinion.
    I'm wondering if you have any thoughts on electrochemical processes for the manufacture of nano Galfenol. I've looked at some ways but wonder if you have or know anyone with practical advice. Cheers.

  • @Caybeats
    @Caybeats 11 років тому

    Hi Robert! Nice work! Can you do some videos for Electrolytes? For example, Ethylene carbonate (Lithium batterys) or somting similar?

  • @thewar200
    @thewar200 6 років тому +1

    Amazing videos. I love them all
    What's the acid's name you show in that black plastic pack ?
    Thank you so much

  • @kiyannareynard-eu7ph
    @kiyannareynard-eu7ph 10 місяців тому

    Obviously copper acetate is one of the few copper salts that are water soluble, I'd recommend avoiding touching it with bare hands. In pigment / painting terms, it's also called verdigris

    • @WildBearFoot
      @WildBearFoot 8 місяців тому

      What is copper dissolved in vinegar and salt?

  • @mhatima5974
    @mhatima5974 11 років тому

    Hi Robert, Quite interesting presentation, I tried to reproduce the first paper and I have got aggregated particles, any idea? in addition I would like to know the mass calculation of PV with a given concentration, for a given concentration of 0.8M, with a PV 30,000g/mal, for a 100ml solution, i have got 2400g of PV which is unbelievable.

  • @atharvah2705
    @atharvah2705 2 роки тому

    Sir, why are we adding Ascorbic acid? I want to create this as mini project. Please help me. I need thorough explanation on this experiment and proper steps to success this. It is very important for me, please help.

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    Could Fe-Co convert an alternating magnetic field's energy and send it through graphene like other systems? That could work quite well I think ..nano induction o.O

  • @MukeshYadav-yg4mk
    @MukeshYadav-yg4mk 6 років тому

    is there any indication that my agno3 is reduced or not if i m reducing it with only ethylene glycol

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    I know the feeling, been thinking about them as well.. hahaha

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    Bimetallic nanoparticles... my mind's racing now ..talking about ideas sparking of other ideas :))

  • @permababy
    @permababy 11 років тому

    If you don't flash the solution, is the ink not conductive? If it's not this would be a cool way to make a PCB: spread the ink over an entire surface, for example over a piece of glass. Then transfer toner to the surface where the toner covers the areas you don't want to be conductive. Next flash the surface. The bare ink would become conductive and presto, your PCB is ready for use.

    • @ThinkingandTinkering
      @ThinkingandTinkering  11 років тому

      good idea - but this is what light forge are doing but with copper oxide instead of copper as xenon flashing reduces the oxide to copper and you don't have the same stability problems with copper oxide inks

  • @jefffrusha6548
    @jefffrusha6548 10 років тому

    How did the sintering go? Might look at using an electronic flash, which I've been seeing used with electroconductive ink, after watching your video

    • @jefffrusha6548
      @jefffrusha6548 10 років тому

      Sorry. Just changed settings and now I see the flash-sintering info. Planning to follow this setup, rinse the copper, and try water-soluble paste flux as the ink base, then flash it and see how it does, as well as sticking to the blank pc-board.

    • @ThinkingandTinkering
      @ThinkingandTinkering  10 років тому +1

      Jeff Frusha
      cool - i have to do the demo on this - been a bit busy of late

  • @lendasock
    @lendasock 8 років тому

    Hi Robert, I am really interested in making this. However I was wondering if it was safe to put on skin? Also I wanted to know if you could create a circuit with your body with this substance. i.e. have a break in the circuit that you could put your hand over to close the circuit? Thanks!

    • @ThinkingandTinkering
      @ThinkingandTinkering  8 років тому

      i don't know how safe it is i have never tested it - i would wear gloves personally

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    Cool!! Does the polyol method work for Cobalt?

  • @MYNICEEV
    @MYNICEEV 11 років тому

    I got two. Says he standing tall and swaggering. LOL LOL LOL

  • @wanisamohammed750
    @wanisamohammed750 9 місяців тому

    Thanks 👍😊 you, I am just need the grams please

  • @localbroadcast
    @localbroadcast 9 років тому

    sweet i knew I ordered that PVP for something!!

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому

      +localbroadcast lol

    • @localbroadcast
      @localbroadcast 9 років тому

      hey do you have any advice on how to predict what will be substituted by what, like in your video of copper sulfate iron chloride blender thing?

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому

      +localbroadcast pauling's scale will help mate

    • @localbroadcast
      @localbroadcast 9 років тому

      thanks a billion.

  • @zine2hamster
    @zine2hamster 9 років тому

    How exactly can one make ink from the collected copper nanoparticles? do you have to mix it with a liquid or something?

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому

      zine2hamster I have a few videos on inkmaking in the youtube playlist - have a look at them

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    I have one ready lol

  • @muralidharreddychalla3877
    @muralidharreddychalla3877 9 років тому

    can we use copper nitrate trihydrate instead of copper acetate and citric acid inplace of ascorbic acid

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому +1

      +muralidharreddy challa it makes sense - so give it a go mate

    • @muralidharreddychalla3877
      @muralidharreddychalla3877 9 років тому +1

      +Robert Murray-Smith. actually it didn't work, resulted in a dark blue solution and that's it no reaction is taking place

    • @ThinkingandTinkering
      @ThinkingandTinkering  9 років тому +1

      +muralidharreddy challa well there you go - you have your answer - though if it is dark blue sounds to me like your concentrations were way to high and i am guessing the reaction conditions weren''t particularly well controlled. Did you try copper (II) nitrate and ascorbic acid? copper (I) nitrate? - it might be the citric acid is just a stabilising agent and you might have to add an additional stronger reducing agent?

  • @serkansevinc8071
    @serkansevinc8071 10 років тому

    Hi Robert I have done the similar rxn but ended up with yellow brown color but I added 1 gram Copper acetate accidentally and what should I add to make conductive adhesive after I get copper nano-particles
    Thanks

    • @ThinkingandTinkering
      @ThinkingandTinkering  10 років тому

      hiya mate see the ink paint basics video Making Inks And Paints - The Basics

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    I never went to college but for a year of graphic design LOL (now I think I should have been a chemist instead)

  • @markhodgson2348
    @markhodgson2348 4 роки тому

    Hi Rob I realise this is a old video, but I'm trying to find "PVP" on Ebay I have got the other items no problem, thank you

    • @charliejames2298
      @charliejames2298 4 роки тому +1

      I Believe PVP is an abbreviation of " Polyvinylpyrrolidone" if you search for this in Ebay you should get some meaningful results

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Like it lol

  • @muralidharreddychalla3877
    @muralidharreddychalla3877 9 років тому

    can produce this copper ink for commercial purposes

  • @angelabehrens3091
    @angelabehrens3091 8 років тому

    Molecular weight of your PVP?

  • @navishkotwal
    @navishkotwal 9 років тому

    can we use polyethylene glycol if diethylene glycol is not available? if yes can we put the same quantity ?

  • @mshigaev1564
    @mshigaev1564 5 років тому

    за статейки спасибо.

  • @BorutPeterlinPhotography
    @BorutPeterlinPhotography 10 років тому +2

    Hm... Could you please somebody confirm that PVP is POLYVINYLPYRROLIDONE?
    Thank you! Robert for president!

    • @ThinkingandTinkering
      @ThinkingandTinkering  10 років тому +2

      I noticed a few posts from you that i seem not to be able to reply to - thankfully i can reply to this one - first point - don't shout please - caps is the text equivalent of shouting - PVP is polyvinylpyrrolidone at MW 100,000g/m. A polyol is a generic name for glycols - I use diethylene glycol but you can use other glycols. Red Copper oxide is best found from a pottery supply company as it is used in glazes

    • @BorutPeterlinPhotography
      @BorutPeterlinPhotography 10 років тому

      Thank you! Sorry for asking such elementary questions. I'm a professional photographer, so you can also ask me which camera is the best for no money, as I'm asked quite a lot.

    • @ThinkingandTinkering
      @ThinkingandTinkering  10 років тому

      Borut Peterlin
      no worries mate

  • @JonathanFosdickNano
    @JonathanFosdickNano 11 років тому

    Li? :)

  • @pluizenbol67
    @pluizenbol67 8 років тому

    Is this ink suitable for electroforming?

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Lol alway gotta go one better lol

  • @MYNICEEV
    @MYNICEEV 11 років тому

    That smee all over. LOL.

  • @Alonkr
    @Alonkr 7 років тому

    Where do you find PVP at 100,000g/m? I can find 40,000g/m everywhere, and 1,300,000g/m sometimes....

  • @6969smurfy
    @6969smurfy 11 років тому

    2nd :)

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Lol

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Cheers mate

  • @ThinkingandTinkering
    @ThinkingandTinkering  11 років тому

    Cheers mate