Crossref journal-article
American Geophysical Union (AGU)
Geophysical Research Letters (13)
Abstract

Goethite is a common iron oxyhydroxide and an important mineral in the biogeochemical cycle of iron at the Earth's surface. However, environmental controls on its formation and alteration have been difficult to quantify. Perhaps this is because past studies have traditionally used needle‐shaped goethite particles that are substantially larger than the goethite nanoparticles commonly observed in nature. High‐resolution transmission electron microscopy and low‐temperature magnetometry of synthetic goethite nanocrystals show that when aqueous suspensions are aged at 90°C, the nanocrystals grow almost exclusively by oriented aggregation of 3–4 nm primary nanocrystals. These primary particles are superparamagnetic above about 35 K, as shown by variations of magnetic susceptibility with temperature. At low temperature (<300 K), both remanent and induced magnetizations of primary nanoparticles are about an order of magnitude larger than for micron‐sized goethite and can act as magnetic signatures of nanophase in controlled environments.

Bibliography

Guyodo, Y., Mostrom, A., Lee Penn, R., & Banerjee, S. K. (2003). From Nanodots to Nanorods: Oriented aggregation and magnetic evolution of nanocrystalline goethite. Geophysical Research Letters, 30(10). Portico.

Authors 4
  1. Yohan Guyodo (first)
  2. Alison Mostrom (additional)
  3. R. Lee Penn (additional)
  4. Subir K. Banerjee (additional)
References 21 Referenced 108
  1. 10.1126/science.289.5480.751
  2. 10.1111/j.1365-246X.1989.tb00504.x
  3. 10.1111/j.1365-246X.1989.tb00505.x
  4. 10.1029/92JB01026
  5. 10.1002/9780470141571.ch4
  6. 10.1016/S0038-1098(01)00147-8
  7. D. J. Dunlop Ö. Özdemir 1997 Cambridge University Press Cambridge
  8. 10.1016/0022-1902(74)80119-3
  9. 10.1016/S0304-8853(99)00347-9
  10. 10.1006/qres.1995.1083
  11. 10.1016/S0016-7037(00)00427-0
  12. {'key': 'e_1_2_6_13_1', 'first-page': '99', 'article-title': 'Théorie du traînage magnétique des ferromagnétiques en grains fins avec applications aux terres cuites', 'volume': '5', 'author': 'Néel L.', 'year': '1949', 'journal-title': 'Annales de Géophysique'} / Annales de Géophysique / Théorie du traînage magnétique des ferromagnétiques en grains fins avec applications aux terres cuites by Néel L. (1949)
  13. {'key': 'e_1_2_6_14_1', 'first-page': '676', 'article-title': 'Propriétés Magnétiques des Grains Fins Antiferro magnétiques: Superparamagnétisme et Superantiferromagnétisme', 'volume': '17', 'author': 'Néel L.', 'year': '1962', 'journal-title': 'J. Phys. Soc. Jap.'} / J. Phys. Soc. Jap. / Propriétés Magnétiques des Grains Fins Antiferro magnétiques: Superparamagnétisme et Superantiferromagnétisme by Néel L. (1962)
  14. 10.1029/96GL00904
  15. 10.1016/S0016-7037(99)00037-X
  16. 10.1130/0091-7613(2001)029<0843:IOCOSG>2.0.CO;2
  17. 10.1006/jcis.1999.6106 / J. Colloid Interface Sci. / Mechanism of formation of monodispersed colloids by aggregation of nanosize precursors by Privman V. (1999)
  18. 10.1515/9781501508783-011 / Nanoparticles and the Environment by Rancourt D. G. (2001)
  19. 10.1029/GL016i008p00851
  20. 10.1007/978-94-009-4007-9_11
  21. U. Schwertmann R. M. Cornell 1991 VCH Publishers New York
Dates
Type When
Created 22 years, 3 months ago (May 23, 2003, 2:26 p.m.)
Deposited 1 year, 10 months ago (Oct. 31, 2023, 4:07 p.m.)
Indexed 1 month, 1 week ago (July 30, 2025, 6:25 a.m.)
Issued 22 years, 3 months ago (May 15, 2003)
Published 22 years, 3 months ago (May 15, 2003)
Published Online 22 years, 3 months ago (May 22, 2003)
Published Print 22 years, 3 months ago (May 15, 2003)
Funders 0

None

@article{Guyodo_2003, title={From Nanodots to Nanorods: Oriented aggregation and magnetic evolution of nanocrystalline goethite}, volume={30}, ISSN={1944-8007}, url={http://dx.doi.org/10.1029/2003gl017021}, DOI={10.1029/2003gl017021}, number={10}, journal={Geophysical Research Letters}, publisher={American Geophysical Union (AGU)}, author={Guyodo, Yohan and Mostrom, Alison and Lee Penn, R. and Banerjee, Subir K.}, year={2003}, month=may }