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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hausner, Douglas B. Debnath, Sudeep Kubicki, James Strongin, Daniel R. |
| Description | Country affiliation: United States Author Affiliation: Debnath S ( Department of Chemistry, Temple University, Philadelphia, PA 19122, United States.) |
| Abstract | The interaction of ascorbic acid with ferrihydrite nanoparticles with and without adsorbed phospholipid has been investigated with atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), density functional theory (DFT) cluster calculations, and batch geochemical methods. Both batch geochemical rate measurements and in situ AFM showed that ferrihydrite particles dissolved in the presence of ascorbic acid over a period of hours. The area-normalized dissolution rate derived from AFM measurements of isolated ferrihydrite particles was relatively constant over the period of dissolution and was faster than the dissolution rate derived from batch reaction methods. Results from ATR-FTIR interpreted in view of theoretical calculations suggested that exposure of ferrihydrite to ascorbic acid led to an adsorbed monodentate ascorbate surface complex. Ferrihydrite dissolution was suppressed if particles were exposed to an organic lipid prior to or during exposure to ascorbic acid. AFM analysis of the lipid layer showed that its thickness was close to 7 nm, the expected value for lipid assembled into a bilayer structure. |
| ISSN | 00219797 |
| Issue Number | 2 |
| Journal | Journal of Colloid and Interface Science |
| Volume Number | 341 |
| e-ISSN | 10957103 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-01-15 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Colloid & Interface Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Colloid and Surface Chemistry Biomaterials Electronic, Optical and Magnetic Materials |
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