Chemometric analysis of spectroscopic data on shape evolution of silver nanoparticles induced by hydrogen peroxide.

摘要: The study on the shape evolution of metal nanoparticles (MNPs) is crucial to gain an understanding controlling and size nanostructures. In this work, a detailed silver (Ag) nanospheres nanoplates induced by hydrogen peroxide (H2O2) was performed. According growth mechanism Ag nanoplates, spectrophotometric method combined with chemometric analysis has potential reveal structural process as observed surface plasmon resonance phenomena. extinction spectra evolving nanostructures were analyzed factor error indicator functions. Five major components attributed different particle shapes sizes theoretically predicted. Furthermore, concentration profiles pure these resolved using multivariate curve resolution–alternative least squares (MCR–ALS) analysis. show that spherical particles systematically evolved into plate structures sizes. Larger obtained when higher concentrations H2O2 employed. An evidence nanoplate disintegration large amount predicted morphologies each component given calculation in excellent agreement those transmission electron microscope (TEM) images.