Try to employ chemical properties, many oxides dissolve in acidic or in basic conditions (Zn), or in the presence of chelate forming agents (Cu, Ag, Au).
You can use XRD to determine if oxides are present in the solution. And from the area of the area of the peaks determined, you can determine their relative amounts.
Dear Eirini
XRD would be the best approach to find out the structure of your synthesized nanomaterial in terms of lattice points and will also help you in understanding the type of structure formed and size of the material.
Further, with the elemental detection also you can detect the presence of oxide.
All the best!!
Although it depends on the metals and the oxides' refractive index and size, maybe you can analyse the light absorption by using a spectrophotometer, and relate this measurements to the total metal content. Depending on the wavelength range, metal oxides are dielectric materials, hence they don't show absorption.
Thank you all fir the advice. Absorption spectrum of my silver nps shows two peaks indicating the presence of silver core- silver oxide shell nps as mentioned in other references. So i want t try a more accurate technique in order to be sure about the cgemical composition of my colloidal
After depositing the colloidal nanoparticles on glass, you can get the amount of metal and metal oxide present in them by XPS (X-ray Photoelectron Spectroscopy) measurements. If metal ions are present in the colloidal solution, it is possible to precipitate the nanoparticles by ultracentrifugation, separating them from the supernatant solution.
- Badges
- Science topic
- Similar topics
- Chemistry
- Nanotechnology
- Nanostructured Materials
- Nanoparticles