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Suspension and Characterization of Aqueous C60 Nanomaterials in Natural and Engineered Waters
Citation:
Isaacson, C. AND D. BOUCHARD. Suspension and Characterization of Aqueous C60 Nanomaterials in Natural and Engineered Waters. Presented at SETAC Europe 20th Annual Meeting, Seville, SPAIN, May 23 - 27, 2010.
Impact/Purpose:
Scientific meeting presentation.
Description:
Many current studies on the aqueous suspension of fullerene (aqu/C60) have used deionized water or simple salt solutions, and as a result little is know about the suspension of fullerene nanomatierals under environmentally relevant conditions, such as solutions that contain organic substituents and suspension exposed to sunlight. Previous reports have shown C60 is suspendable in the order of few to tens of mg per liter in the presence of humic acid. However, these reports use non-specific detection for the quantification of C60 which are prone to analyitical artifacts. Additionally, the effect of humic acid concentration on the mass of C60 suspended and the size of aqu/C60 aggregates has just begun to be explored. In this study, we report on the mass and size of aqu/C60 suspended in the presence of varying humic acid concentrations and upon exposure and lack of exposure to sunlight. The mass of C60 was quantified by liquid chromatography atmospheric pressure photo-ionization mass spectrometry (LC-APPI-MS). The size and size distribution of aqu/C60 were determined by dynamic light scattering (DLS) and asymmetric flow field-flow fractionation coupled to dynamic light scattering (AF4-DLS).
URLs/Downloads:
BOUCHARD 09 161_ABSTRACT_SETAC EUROPE 11.30.09.PDF (PDF, NA pp, 70 KB, about PDF)BOUCHARD 09 161A_SLIDES_SETAC EUROPE 2010.5.19.PDF (PDF, NA pp, 642 KB, about PDF)