Browsing by Author "Madden, Andrew S. Elwood"
Now showing items 1-3 of 3
-
Considering the formation of hematite spherules on a Mars by freezing queous hematite nanoparticle suspensions
Sexton, M. R.; Madden, M. E. Elwood; Swindle, Andrew L.; Hamilton, V. E.; Bickmore, B. R.; Madden, Andrew S. Elwood (Elsevier B.V., 2017-04)The enigmatic and unexpected occurrence of coarse crystalline (gray) hematite spherules at Terra Meddiani on Mars in association with deposits of jarosite-rich sediments fueled a variety of hypotheses to explain their ... -
Size-dependent reactivity of magnetite nanoparticles: a field-laboratory comparison
Swindle, Andrew L.; Madden, Andrew S. Elwood; Cozzarelli, Isabelle M.; Benamara, Mourad (American Chemical Society, 2014-10-07)Logistic challenges make direct comparisons between laboratory- and field-based investigations into the size-dependent reactivity of nanomaterials difficult. This investigation sought to compare the size-dependent reactivity ... -
Using chromate to investigate the impact of natural organics on the surface reactivity of nanoparticulate magnetite
Swindle, Andrew L.; Cozzarelli, Isabelle M.; Madden, Andrew S. Elwood (American Chemical Society, 2015-02-17)Chromate was used as a chemical probe to investigate the size-dependent influence of organics on nanoparticle surface reactivity. Magnetitechromate sorption experiments were conducted with similar to 90 and similar to 6 ...