Event Title
Kinetics of the Photoreduction of p-nitrobenzoic Acid on Ag and AgxAu1-x Nanoparticle Films
Faculty Sponsor
Brian D. Gilbert
Location
Jereld R. Nicholson Library
Date
5-17-2013 3:00 PM
End Date
5-17-2013 4:30 PM
Subject Area
Chemistry
Description
A recent strategy to increase the efficiency of photovoltaic and photoemissive devices has been to include metal nanolayers in contact with an organic layer inside these devices. Metal nanoparticles (especially Ag and Au) are known to catalyze photoreactions of organic molecules on their surfaces. The reactivity of organics at nanometal surfaces has implications for device lifetimes; therefore, it is important to understand how nanoparticle size and composition influence reaction rates. The photoreduction of p-nitrobenzoate (PNBA) to p,p’-azodibenzoate (PPADBA) on Ag nanoparticles is an excellent model system for studying such reactions. We have measured the reaction rate of PNBA to PPADBA on Ag and Au based nanoparticle surfaces using surface-enhanced Raman spectroscopy (SERS). SERS is a highly sensitive spectroscopic tool, which provides molecular fingerprints that can be used to identify molecular species present on metal nanoparticle surfaces. These surfaces are made from layers from Ag and AgxAu1-x alloy nanoparticles with diameters ranging from 50-80 nm.
Recommended Citation
Corp, Kathryn L. and Gilbert, Brian D., "Kinetics of the Photoreduction of p-nitrobenzoic Acid on Ag and AgxAu1-x Nanoparticle Films" (2013). Science and Social Sciences. Event. Submission 31.
https://digitalcommons.linfield.edu/studsymp_sci/2013/all/31
Kinetics of the Photoreduction of p-nitrobenzoic Acid on Ag and AgxAu1-x Nanoparticle Films
Jereld R. Nicholson Library
A recent strategy to increase the efficiency of photovoltaic and photoemissive devices has been to include metal nanolayers in contact with an organic layer inside these devices. Metal nanoparticles (especially Ag and Au) are known to catalyze photoreactions of organic molecules on their surfaces. The reactivity of organics at nanometal surfaces has implications for device lifetimes; therefore, it is important to understand how nanoparticle size and composition influence reaction rates. The photoreduction of p-nitrobenzoate (PNBA) to p,p’-azodibenzoate (PPADBA) on Ag nanoparticles is an excellent model system for studying such reactions. We have measured the reaction rate of PNBA to PPADBA on Ag and Au based nanoparticle surfaces using surface-enhanced Raman spectroscopy (SERS). SERS is a highly sensitive spectroscopic tool, which provides molecular fingerprints that can be used to identify molecular species present on metal nanoparticle surfaces. These surfaces are made from layers from Ag and AgxAu1-x alloy nanoparticles with diameters ranging from 50-80 nm.