Sunflower oil mediated biomimetic synthesis and cytotoxicity of monodisperse hexagonal silver nanoparticles.

In this work, sunflower oil was utilized for the biomimetic synthesis of silver (Ag) nanoparticles (NPs), leading to highly mono-dispersed hexagonal-shaped silver nanoparticles (NPs) at various concentrations. It was found that the biomolecules of the oil not only have the capability to reduce silver ions, due to its extended phenolic system, but also appear to recognize and affect the Ag nanocrystal growth on the (110) face, leading to hexagonal growth of the NPs of 50 nm size. Initially, some spherical AgNPs of less than 10nm diameter were observed; however, over a longer period of time, a majority of hexagonal-shaped nanocrystals were formed.

Synthesis and cytotoxicity evaluation of novel acylated starch nanoparticles.

Starch nanoparticles (StNPs) were acylated under ambient conditions to obtain various nanosized derivatives formed stable suspension in water and soluble in organic solvents. The degree of substitution (DS) was determined using (1)H NMR technique. The cytotoxicity potential of the derivatised StNPs was evaluated in mouse embryonic fibroblast (3T3L1) cells and A549 tumor cell line using MTT cell viability assay.

Cytotoxicity evaluation and antimicrobial studies of starch capped water soluble copper nanoparticles.

Water soluble monodisperse copper nanoparticles of about 10nm diameter were prepared by microwave irradiation using starch as green capping agent. The resulting Cu-starch conjugate were characterized by FTIR and energy dispersive X-ray analysis (EDX). The study confirmed the presence of copper embedded in polysaccharide matrix.