Title

Controlling The Dissolution Of Ag In Ag-Au Core Shell Nanoparticles Of Varying Shell Thickness

Author(s)

Will Carpenter

School Name

South Carolina Governor's School for Science and Mathematics

Grade Level

12th Grade

Presentation Topic

Chemistry

Presentation Type

Mentored

Mentor

Mentor: Jamie Lead, Arnold School of Public Health, University of South Carolina

Abstract

Silver nanoparticles have recently come into use in multiple industrial and consumer products. Silver nanoparticles have been shown to be toxic in aquatic environments, but it is not known whether the toxicity is from the dissolution of the nanoparticle or the presence of the nanoparticle. The experiment was performed by creating differing thicknesses in the silver-gold core-shell nanoparticles. These nanoparticles were then dissolved in moderately hard water for 24 hours. The concentrations of silver in each of its forms at zero and twenty-four hours was measured. It was found that as the thickness of the outer gold layer was thickened, the dissolution decreased. Future work will deal with pinpointing the exact range in which there is the least dissolution with the thinnest gold layer.

Start Date

4-11-2015 10:45 AM

End Date

4-11-2015 11:00 AM

COinS
 
Apr 11th, 10:45 AM Apr 11th, 11:00 AM

Controlling The Dissolution Of Ag In Ag-Au Core Shell Nanoparticles Of Varying Shell Thickness

Silver nanoparticles have recently come into use in multiple industrial and consumer products. Silver nanoparticles have been shown to be toxic in aquatic environments, but it is not known whether the toxicity is from the dissolution of the nanoparticle or the presence of the nanoparticle. The experiment was performed by creating differing thicknesses in the silver-gold core-shell nanoparticles. These nanoparticles were then dissolved in moderately hard water for 24 hours. The concentrations of silver in each of its forms at zero and twenty-four hours was measured. It was found that as the thickness of the outer gold layer was thickened, the dissolution decreased. Future work will deal with pinpointing the exact range in which there is the least dissolution with the thinnest gold layer.