Determination of Plant-Based Synthesized Silver and Copper Hydroxide Nanoparticles Using Mie Theory Compared With an Experimental Approach

Nanomaterials derived from metal-oxide frameworks are attracting significant attention for a wide range of applications due to their exceptional properties and high surface plasmon resonance. However, their practical assessment of these properties is often limited by the lack of proper analysis equipment. The work presents a theoretical and experimental assessment of the size of particles of plant extract-based synthesized Ag-NPs and Cu(OH)2-NPs. Optical response with features related to diffuse scattering dominated by local surface plasmon resonance was utilized in particle size determination using the Mie theory. The theoretical results were comparable with the experimental transmission electron microscopy (TEM) assessment. Moreover, the results showed spherical particles with an average size of 65 nm for Ag-NPs and 25 nm for Cu(OH)2-NPs. Both methods are complementary and consequently can be utilized for quality control and full particle size determination