We perform a kinetic study of Ag nanoparticles (AgNP) using electrospray-differential mobility analysis (ES-DMA). Transmission electron microscopy (TEM) is employed orthogonally to provide imagery confirming primary size and also cluster state measured by ES-DMA. Distinct peaks (i.e., with different ion mobility) observed over a broad range of pH conditions represent different types of finite size nanoparticle clusters (e.g., dimers, trimers). For unconjugated AgNP, degree of aggregation is increased significantly with reaction time at pH2.3), and BSA conjugation on the surface of AgNP can suppress the aggregation rate.

Understanding ligand-nanoparticle interactions to colloidal stability of silver nanoparticles

248th National Meeting (2014)

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