The scattering of laser photons of various wavelengths are used to create a calibration curve that correlates the size of the nanoparticles to the intensity of the scattered light. Purchased solutions of gold nanoparticles of various sizes are subjected to laser light and the deflected photons are detected by monochromator. The resulting intensity of the collected photons, along with the size of the nanoparticle, are used to create a calibration curve. Initial analysis of the data indicate that the intensity of the collected photons increase exponentially with the increase in nanoparticle size. The experimental technique will also be applied to TiO2 nanoparticles, in which the nanoparticle powder is dispersed in an aqueous solvent. The TiO2 will enable not only the investigation of scattered photons to nanoparticle size, but also the assessment of the role that nanoparticle concentration plays in the relationship between intensity and size. Subsequently, the calibration curves for both the Au and TiO2 nanoparticle systems will be used to offer a quick and efficient technique with which the size of synthesized nanoparticles can be determined.

Scattered photon intensity as a tool to calibrate the size of Au and TiO2 nanoparticles

255th National Meeting (2018)

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