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Full-Text Articles in Analytical Chemistry
On-Road Measurments Of Transit Bus Emissions, Matt Breuer
On-Road Measurments Of Transit Bus Emissions, Matt Breuer
Summer Research
Emissions were monitored from transit buses to determine the difference in emissions between engine technologies and model years. The Environmental Protection Agency’s newest emissions standards set into law in 2007 and 2010 limited the level of emissions transit buses and other heavy-duty vehicles are able to produce. For the most part, these standards have been regulated in lab. My research looked at the emissions from these buses on-road, under normal operating conditions. At the Federal Way Transit Center, four types of bus engines were analyzed: conventional diesel, diesel with catalytic emission control, compressed natural gas, and diesel-electric hybrid. A remote …
Non Aggregated Colloidal Silver Nanoparticles For Surface Enhanced Resonance Raman Spectroscopy, Aoife Power, John Cassidy, Tony Betts
Non Aggregated Colloidal Silver Nanoparticles For Surface Enhanced Resonance Raman Spectroscopy, Aoife Power, John Cassidy, Tony Betts
Articles
Silver nanoparticles with a tuneable l max were produced as colloids by heterogeneous nucleation. The synthesis process is both fast and repeatable, producing stable PVA capped nanoparticles. The colloid’s effectiveness in the SERRS system was investigated using Rhodamine 6G, R6G, Crystal Violet, CV, and Malachite Green, MG, as probe molecules. A clear sensing trend was observed, where the Raman signal emitted was significantly enhanced by the addition of silver nanoparticles. A build up of signal intensity is observed until an optimum ratio is achieved, followed by a decline in signal intensity as the concentration of nanoparticles is further increased. The …