Engineering Commons^™

Survey Of The Performance Of Gold Nanoparticles Within An Ssdna-Stabilized Biosensor For The Detection Of Hg2+, Madalyn Zagajowski

Pence-Boyce STEM Student Scholarship

Methods

5 nm AuNPs were synthesized by combining solutions of HAuCl4 and sodium citrate, followed by dropwise addition of NaBH4 solution and aging for 24 hours. Additionally, Hg-bound poly(30)T ssDNA oligos were prepared by incubating with HgCl2 solution, with exonuclease I being added to denature unbound DNA. Aliquots of the AuNP solution were then treated with the ssDNA, either Hg-bound or non-Hg bound, and UV-vis and fluorescence spectra were taken of the samples with a Shimadzu UV-1280 spectrophotometer and a Hitachi F-2500 fluorescence spectrophotometer.

Results & Discussion

The UV-vis spectral data of the non-Hg bound AuNP/ssDNA complex samples did not …

Evaluating The Scalability Of Graphene Synthesis, Evan Dexter

Scholar Week 2016 - present

Graphene is a new material, first isolated in 2004, consisting of one to a few atomic layers of carbon in a lattice sheet structure. Graphene has high tensile strength, high surface area, very low electrical resistance, and various other special properties that make it an excellent material for use in emerging technologies in the categories of electrical components, energy systems, and high strength applications. The production scale of graphene sheets and its variations is currently limited to laboratory use, with a great amount of current research going into the development of manufacturing techniques of the material. I conducted experiments to …

Generating Spectra Using Pca-Based Spectral Mixture Models, Joseph S. Makarewicz, Heather D. Makarewicz

Scholar Week 2016 - present

PCA-based spectra mixture models have been created for several laboratory mixture data sets. This presentation provides examples of spectra that were generated using PCA-based spectra mixture models.