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Low-Field Magnetic Separation of Monodisperse Fe 3 O 4 Nanocrystals
Abstract
Magnetic separations at very low magnetic field gradients (<100 tesla per meter) can now be applied to diverse problems, such as point-of-use water purification and the simultaneous separation of complex mixtures. High–surface area and monodisperse magnetite (Fe 3 O 4 ) nanocrystals (NCs) were shown to respond to low fields in a size-dependent fashion. The particles apparently do not act independently in the separation but rather reversibly aggregate through the resulting high-field gradients present at their surfaces. Using the high specific surface area of Fe 3 O 4 NCs that were 12 nanometers in diameter, we reduced the mass of waste associated with arsenic removal from water by orders of magnitude. Additionally, the size dependence of magnetic separation permitted mixtures of 4- and 12-nanometer–sized Fe 3 O 4 NCs to be separated by the application of different magnetic fields.
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Citations
Cited by
Arsenic removal from water/wastewater using adsorbents—A critical review
Mohan, D., & Pittman, C. U. (2007) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2007.01.006 · Cited by 3,536
Applications of nanotechnology in water and wastewater treatment
Qu, X., Alvarez, P. J. J., & Li, Q. (2013) · Water Research · doi:10.1016/j.watres.2012.09.058 · Cited by 2,444
Li, Q., Mahendra, S., Lyon, D. Y., Brunet, L., Liga, M. V., Li, D., & Alvarez, P. J. J. (2008) · Water Research · doi:10.1016/j.watres.2008.08.015 · Cited by 2,385
Liu, J.-F., Zhao, Z.-S., & Jiang, G.-B. (2008) · Environmental Science & Technology · doi:10.1021/es800924c · Cited by 1,084
Qu, X., Brame, J., Li, Q., & Alvarez, P. J. J. (2013) · Accounts of Chemical Research · doi:10.1021/ar300029v · Cited by 799
Metadata
- Authors
- Yavuz, C. T., Mayo, J. T., Yu, W. W., Prakash, A., Falkner, J. C., Yean, S., Cong, L., Shipley, H. J., Kan, A., Tomson, M., Natelson, D., & Colvin, V. L.
- Venue
- Science
- Published
- 2006-11-10
- Volume
- 314
- Issue
- 5801
- Pages
- 964-967
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1984395192
- Cited by
- 1,250
- References
- 0
- FWCI
- 28.43
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yavuz, C. T., Mayo, J. T., Yu, W. W., Prakash, A., Falkner, J. C., Yean, S., Cong, L., Shipley, H. J., Kan, A., Tomson, M., Natelson, D., & Colvin, V. L. (2006). Low-Field Magnetic Separation of Monodisperse Fe 3 O 4 Nanocrystals. Science. https://doi.org/10.1126/science.1131475
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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