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SUMMARY:The pH-Dependent Interfacial Structure of N3-dye
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20211021T160000
UID:2026-04-25-03-08-30@natsci.colostate.edu
DTSTAMP:20260425T030830
Description:Research Seminar:\n\nN3-dye is a popular chromophore in the fam
 ily of Ru(bpy) transition-metal photocatalysts and is often used in the fa
 brication of dye-sensitized solar cell (DSSC) photovoltaic devices.  The 
 interfacial structure and adsorption geometry of N3-dye affects the electr
 on transfer kinetics within a DSSC device\, which can influence the overal
 l device efficiency. Heterodyne detected vibrational sum frequency generat
 ion (HD-VSFG) spectroscopy is used to study the interfacial structure of N
 3-dye on gold and TiO2 substrates.  HD-VSFG is a powerful spectroscopic t
 echnique that yields vibrational information exclusively at an interface a
 nd is utilized to elucidate the adsorption geometry of N3-dye.  It is rev
 ealed that by altering the pH of deposition conditions\, the dye changes i
 ts adsorption geometry on both gold and TiO2.  Additionally\, in-situ HD-
 VSFG studies investigate the adsorption geometry of N3-dye on TiO2­ in th
 e presence of acetonitrile and reports on the N3-dye structure and environ
 ment within a DSSC device. The study of how conditions influence the adsor
 ption geometry of N3-dye will inform future studies on dye/chromophore loa
 ding conditions and overall photovoltaic device fabrication. 4:00 pm
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