Recent content by nadaben

Hello everyone I want to know what is the difference between Absorption and Extinction spectra. and in term of experiment how can get extinction spectrum. Thank you

Hello everyone in a synthesis, they mixed oleylamine with a boiling solution of toluene for 2hours they didn't mention if it's with reflux or not ! i don't know if it doesn't represent any harmful consequence even in fume hood

Actually my solution is not that much concentrated when i deposit a drop it's almost colorless thank you for other informations it's very interesting

to caracterize for exple metallic nanoparticles with SEM i should deposite them on a substrate i tried a deposition on glass substrate but it doesn't work and i see nothing can anyone help me or suggest an appropriate solution to that best regards

Yes exactly ! Thank u so much for your help

if i have spherical nanoparticles sized 30nm and i want to cover them with a product with an amount of 0.6 molecule/nm² how can i know the corresponding quantity that i should take of this product? is it by multipliying the surface of nanoparticle (4πr²) by 0.6?

There is no way to know the amount i can take? cause i should mix it with my solution before deposition..

Hi everyone in an article they mentioned that the amount added of a product is given by molecules/nm² how can i obtain a molar or mass concentration from it ? best regards

Thank u so much ! It's a very important work .. i should look for its details ! If u have any other ideas or references please share

No actually i didn't try! Do you have references in this way?

Even if we add the organic solvent nanoparticles have an affinity to water so they remain in the aqueous phase Metal are gold or silver...what is the role of the surfactant? Is it to transfer them to the organic phase? In this case I've tried this method but it doesn't work for my solvent(...

The nanoparticles are prepared in water ! I have no other products in the solution.. the goal is to dry and redissolve them in organic solvents so I must avoid agglomerating them while drying

normally metallic nanoparticles are sensitive to higher temperatures.. i tried to dry them in rotary evaporator but they remains sticked in the vial

hello everyone i wonder if someone can help me to dry completely metallic nanoparticles synthesized in water while maintaining their shape (without aggregation).or if there is a way to synthesize them directly in organic phase