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Full-Text Articles in Physical Sciences and Mathematics
Dendrimer Modified Silica Nanoparticles As Fluorescent Chemosensors For The Detection Of Copper And Cyanide Ions, Alicia Luhrs
Dendrimer Modified Silica Nanoparticles As Fluorescent Chemosensors For The Detection Of Copper And Cyanide Ions, Alicia Luhrs
Master's Theses
A series of silica nanoparticle-based fluorescent chemosensors were synthesized for the sensitive and selective detection of Cu2+ ions in aqueous solution and subsequent CN- ion detection. Silica nanoparticles (SNP) were modified with branching polyamidoamine (PAMAM) dendrimers, which function as selective turn-off Cu2+ ion chelators and platforms for the attachment of rhodamine isothiocyanate (RITC) or fluorescein isothiocyanate (FITC) fluorescent dyes. In the presence of Cu2+ ions, the emission of the fluorescent dye is quenched by Forster resonance energy transfer (FRET) and is dependent upon dendrimer generation, pH, fluorescent dye, and surface charge. The quenching effectiveness was analyzed …
Evaluation Of The Development And Effectiveness Of Copper Total Maximum Daily Loads (Tmdls) To Achieve Marine Water Quality Criteria, Joanna Florer
Evaluation Of The Development And Effectiveness Of Copper Total Maximum Daily Loads (Tmdls) To Achieve Marine Water Quality Criteria, Joanna Florer
Master's Projects and Capstones
Elevated concentrations of certain chemicals in surface water are known to be toxic to aquatic organisms (e.g., barnacles, algae, and fish). For a number of these chemicals (e.g., tributyltin [TBT], copper) federal and state water quality standards exist to protect aquatic organisms. As a means to comply with water quality standards, regulatory agencies establish Total Maximum Daily Loads (TMDLs) to reduce concentrations of toxic chemicals from entering waterways. A TMDL determines the maximum amount of pollutant loading a water body can sustain and still achieve water quality standards; they are developed to ensure that surface water concentrations meet applicable criteria. …