To determine the concentration of molecules using Bouguer-Lambert-Beer law. Absorption of light by a thin layer of a homogeneous medium (solution) proportional molecules contained therein. In law B-L-B is molar extinction coefficient. Spectrum in your dispersions occurs through the interaction of photons of light with plasmons, and not with the electrons of the molecules.
Regards.
The molar extinction coefficient you calculate if you know exactly what your all spherical nanoparticles, are the same size. Look file. Different methods produce different size. The intensity of absorption depends on the form. Otherwise, you need to determine exactly the dimension of MEC 1 / mol cm. In fact, the nanoparticles are different in shape, size. It is difficult to determine the concentration. Dispersions contain surfactants, which affect the field in the absorption spectrum. MEC dispersions useless to compare because of the large experimental errors.
Regards.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Materials Chemistry