Make Gold Nanoparticles - Easy Method!

Have you heard of gold nanoparticles? We do a super cool experiment, showing you how to make gold nanoparticles, and looking at what happens when they interact with light. The gold particles turn red, blue, and black!
We also look at what happens when we add salt, something that increases the size of the nanoparticles! What happens when salt is added? Watch to find out! Please like comment, and share this video to get more cool science video suggestions.
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Thank you for watching and see you next time!

[@ChemTalk]

What is the coolest thing you learned about Gold Nanoparticles? Post your question or answer in the comments!

[@bombholoquisen]

Can I use electrolysis to collect all nano gold?? 😅

[@Lawtonfl]

Gold nanoparticles are amazing but the reasoning behind the color change is probably the most amazing thing about it!

[@ChemTalk]

Yep! Watch the video to find out why they change color :)

[@jesusvergara4855]

So colorful

[@ChemTalk]

Exactly, who knew that elemental gold particles could be different colors?

[@JaiKumaravel-oo9gg]

Super cool experiment! I really like how you explained the experiment's reasoning, not just telling us what to do. I'll be sure to share it with others that are interested in chemistry!

[@ChemTalk]

Thanks Jai, that would be awesome! And we appreciate the nice feedback

[@curranjacobus3344]

Great Vid!

[@ChemTalk]

thanks Curran, glad you liked it!

[@mariellewilson2224]

so interesting! thanks super helpful 🎉

[@ChemTalk]

Your welcome, thanks for watching!

[@scottgreg2967]

This is the first good video on gold nanoparticles that I've seen, great job ChemTalk!

[@ruger1405]

Excellent explanation and solid editing!

[@ChemTalk]

thanks ruger, we appreciate the feedback!

[@science_and_anonymous]

Looks great! Loved this experiment. I was unaware of the photo-electric effect of the gold particles which gave the difference in colors. Nice work!

[@ChemTalk]

Yeah, it's such a cool effect

[@pixelpatter01]

I was interested in the color change reasoning but I'm confused by your explanation of higher frequency light ( longer) wavelength. Higher frequencies have shorter wavelengths.

[@Lawtonfl]

Thanks for the comment! In the video we were attempting to refer to longer wavelengths not higher frequencies but the wording we used was not the best. I will make sure to address this. I appreciate you pointing this out! We probably should have made that a bit more clear with a diagram. The underlying premise is that the larger particles absorb longer wavelengths of light. This wavelength is actually equal to the particle diameter Thanks!

[@aceflowerheart]

Awesome video!!

[@ChemTalk]

Thanks Ace, it was fun to make!

[@edensimmons4013]

Very informative

[@riyajain2825]

So informative! I've made these before but had no clue about their photo-electric effect!

[@ChemTalk]

Thanks for the comment Riya, yeah the effect on the colors is really amazing

[@johnsonbhatti3619]

Very useful video

[@roxannesalkeld378]

definitely passing this on to my classmates, we're doing a similar experiment this semester!

[@ChemTalk]

Awesome, hope this video helps

[@olivialambertson1509]

this is a great video! they made the experiment super easy to follow!

[@ChemTalk]

thanks Olivia, next experiment is coming soon!

[@ghazighaznavi9696]

One of the best noted point is that gradually changing the color from red to royal blue or purple , regarding these colours we know the best sizes of Gold nano particles. Thanks with best regards.🤗🌹🤗

[@dujiriti2881]

Very interesting video! The narrator was really easy to listen to. Keep it up!

[@ChemTalk]

Great, we'll let her know!

[@cathiemerkel9549]

Awesome! I love seeing your various experiments along with the explanations!

[@ChemTalk]

thanks so much Cathie!

[@DiscGolfGirl]

super cool!

[@ChemTalk]

Thanks Cici!

[@moonamigi]

So cool!

[@ChemTalk]

Right?

[@ghazighaznavi9696]

Nice Superb Excellent & very informative and impressive video👍✨👍🌷🌷🌷👍✨👍

[@aasthapandya3515]

Amazing video! I appreciate the explanations behind the color changes!

[@ChemTalk]

thanks for watching Aastha!

[@mansurcetinkaya1446]

Hello, I want to put the gold in a salt-like form like sugar, that is, I want to dissolve it in normal drinking water (nanopathicular). I would appreciate it if you could help me, thank you in advance.

[@cameronhill5560]

Nice!!

[@ChemTalk]

Thanks Cameron!

[@jacekolejniczak8726]

What it means "small amount"? 1/2 ml, 1 ml, 2 ml?

[@imanepenpalling2459]

you didnt mention the temperature

[@Chemobeings]

Plz tell me how to make platinum nanoparticles...

[@spacestar1770]

but what solution is fit to ingest as a dietry supplement

[@10ksimmons]

Very cool experiment!

[@ChemTalk]

Thank you! Cheers!

[@briansimmons5228]

Awesome

[@Livefire7]

Is this different to colloidal gold? Sorry I'm completely new to this

[@septimustyrannis321]

Can you ingest this?

[@malvikabhardwaj8199]

Love it!

[@ChemTalk]

So glad!

[@user-li7fp9ll1w]

您好，請問我該如何選擇，與Au具有絕對選擇性的材料成分讓我實驗試試看，因為它們真的很喜歡與銅搞混在一起，我真的十分懊惱

[@johnsonbhatti3619]

MY Name is Johnson Gabriel Bhatti from Lahore Pakistan

[@abdalrahman3347]

How to get copper nanoparticles, excuse me.

[@ChemTalk]

Thanks for the comment! We made gold nanoparticles, not copper.

[@abdalrahman3347]

@@ChemTalk i know, but i ask about method for getting copper nanoparticles

[@ChemTalk]

@@abdalrahman3347 future video!

[@yolandavalencia5127]

P R O M O S M 😋

[@assiftachdirt6539]

How can gold nanoparticles be redeposited in solution?