The particle size plays a critical role in nanoparticle properties and therefore property characterization of related nanoparticles is an essential task in particle sizing. Herein, the hydrodynamic diameters of different gold nanoparticle were measured by using dynamic light scattering (DLS) spectroscopy and these experimentally measured diameters were compared with the theoretically found ones by using principal component (PCA) and linear discriminant analysis (LDA) methods. These two methods were compared with regard to determination of the clusters of the similar sized nanoparticles by using UV-Vis spectra in the region of 350-750 nm obtained from UV-Vis spectrophotometer. Surface plasmon resonance peaks and diameters of different nanoparticles are expressed as polynomial functions of weights of dominant eigenvectors. When the results of the two techniques are compared, LDA technique clearly discriminates the nanoparticles from each other, and approximates the diameter and resonance peak of a nanoparticle much better than PCA technique.

Gold nanoparticles size characterization using PCA and LDA techniques by UV-Vis spectroscopy

249th National Meeting (2015)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.