Monodisperse silver and gold alloy nanoparticles of controlled composition and size were synthesized for the development of a potential drug delivery system. The seeded growth of the alloy nanoparticles through a co-reduction of gold and silver salts, using the Turkevich approach, was used for synthesizing the nanoparticles. The size of the nanoparticles was characterized using a NanoSight LM10 HS and their composition with a UV-Vis spectrophotometer. These alloys and earlier gold nanoparticles of varying sizes were introduced to live wild-type S. cerevisiae cells in their “active stage” and the absorbance of the cells after incubation with nanoparticles was measured with a UV-Vis spectrophotometer. Absorbance data suggests that the number of nanoparticles taken up by the yeast cells is negligible as no peak was observed in the yeast cells after they had been washed and centrifuged to discard excess alloy nanoparticles. Further research is necessary to see if the addition of antibodies increases the number of nanoparticles attached to the yeast cells, future coating with lipids and a SERS tag, and maybe even attaching a therapeutic agent.

Alloy Au/Ag nanoparticles introduced to yeast cells in vivo

255th National Meeting (2018)

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