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Physical Sciences and Mathematics Commons

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Eastern Michigan University

Theses/Dissertations

Gold

Publication Year

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Full-Text Articles in Physical Sciences and Mathematics

Determination Of Thiamine In Solution By Uv-Visible Spectrophotometry: The Effect Of Interactions With Gold Nanoparticles, Michael Vincent Zielinski Jul 2014

Determination Of Thiamine In Solution By Uv-Visible Spectrophotometry: The Effect Of Interactions With Gold Nanoparticles, Michael Vincent Zielinski

Master's Theses and Doctoral Dissertations

The method presented here provides the foundation for a simple and selective qualitative determination of thiamine in solution. Gold nanoparticles in the presence of thiamine results in the formation of a secondary peak in the absorbance spectrum of the mixture. This peak can be used as an indicator of thiamine, which is useful for the qualitative analysis of solutions, and may provide an alternative to other methods for evaluating thiamine in blood and other biological systems. This method uses gold nanoparticles of a size around 20 to 30 nm and involves their selective interaction with thiamine, compared to selected amino …


Chemiluminescent Reactions Catalyzed By Nanoparticles Of Gold, Silver, And Gold/Silver Alloys, Saqib Ul Abideen Mar 2012

Chemiluminescent Reactions Catalyzed By Nanoparticles Of Gold, Silver, And Gold/Silver Alloys, Saqib Ul Abideen

Master's Theses and Doctoral Dissertations

Chemiluminescence (CL) reactions are catalyzed by metals nanoparticles, which display unique catalytic properties due to an increased surface area. The present study describes the catalytic effects of nanoparticles (NP) of silver, gold, and alloys of Au/Ag nanoparticles on the chemiluminescent reaction taking place between luminol and potassium ferricyanide. It was found that silver nanoparticles and alloy nanoparticles enhance the CL process when their sizes remained in the range of 30 nm to 50 nm. The data show that the intensity and rate of chemiluminescence were influenced by the mole fraction of gold and silver in the alloy. Data to this …