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Title: Synthesis and characterization of Gd-doped magnetite nanoparticles

Abstract

There has been rising interest in the synthesis of magnetite nanoparticles due to their importance in biomedical and technological applications. Tunable magnetic properties of magnetite nanoparticles to meet specific requirements will greatly expand the spectrum of applications. Tremendous efforts have been devoted to studying and controlling the size, shape and magnetic properties of magnetite nanoparticles. We investigate gadolinium (Gd) doping to influence the growth process as well as magnetic properties of magnetite nanocrystals via a simple co-precipitation method under mild conditions in aqueous media. Gd doping was found to affect the growth process leading to synthesis of controllable particle sizes under the conditions tested (0–10 at% Gd 3+). Typically, undoped and 5 at% Gd-doped magnetite nanoparticles were found to have crystal sizes of about 18 and 44 nm, respectively, supported by X-ray diffraction and transmission electron microscopy. These results showed that Gd-doped nanoparticles retained the magnetite crystal structure, with Gd 3+ randomly incorporated in the crystal lattice, probably in the octahedral sites. The composition of 5 at% Gd-doped magnetite was Fe (3-x)Gd xO 4 (x=0.085±0.002), as determined by inductively coupled plasma mass spectrometry. 5 at% Gd-doped nanoparticles exhibited ferrimagnetic properties with small coercivity (~65 Oe) and slightly decreased magnetization atmore » 260 K in contrast to the undoped, superparamagnetic magnetite nanoparticles. Templation by the bacterial biomineralization protein Mms6 did not appear to affect the growth of the Gd-doped magnetite particles synthesized by this method.« less

Authors:
 [1];  [1];  [1];  [1]
  1. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1355752
Alternate Identifier(s):
OSTI ID: 1396827
Report Number(s):
IS-J 9305
Journal ID: ISSN 0304-8853; PII: S0304885316324428
Grant/Contract Number:  
679080; 618321; MP-1201; FIS2014-54498-R; MDM-2014-0377; AC02-07CH11358
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 423; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; magnetic nanoparticles; aqueous synthesis; rare earth; doping; crystal size

Citation Formats

Zhang, Honghu, Iowa State Univ., Ames, IA, Malik, Vikash, Mallapragada, Surya, Iowa State Univ., Ames, IA, Akinc, Mufit, and Iowa State Univ., Ames, IA. Synthesis and characterization of Gd-doped magnetite nanoparticles. United States: N. p., 2016. Web. doi:10.1016/j.jmmm.2016.10.005.
Zhang, Honghu, Iowa State Univ., Ames, IA, Malik, Vikash, Mallapragada, Surya, Iowa State Univ., Ames, IA, Akinc, Mufit, & Iowa State Univ., Ames, IA. Synthesis and characterization of Gd-doped magnetite nanoparticles. United States. https://doi.org/10.1016/j.jmmm.2016.10.005
Zhang, Honghu, Iowa State Univ., Ames, IA, Malik, Vikash, Mallapragada, Surya, Iowa State Univ., Ames, IA, Akinc, Mufit, and Iowa State Univ., Ames, IA. Tue . "Synthesis and characterization of Gd-doped magnetite nanoparticles". United States. https://doi.org/10.1016/j.jmmm.2016.10.005. https://www.osti.gov/servlets/purl/1355752.
@article{osti_1355752,
title = {Synthesis and characterization of Gd-doped magnetite nanoparticles},
author = {Zhang, Honghu and Iowa State Univ., Ames, IA and Malik, Vikash and Mallapragada, Surya and Iowa State Univ., Ames, IA and Akinc, Mufit and Iowa State Univ., Ames, IA},
abstractNote = {There has been rising interest in the synthesis of magnetite nanoparticles due to their importance in biomedical and technological applications. Tunable magnetic properties of magnetite nanoparticles to meet specific requirements will greatly expand the spectrum of applications. Tremendous efforts have been devoted to studying and controlling the size, shape and magnetic properties of magnetite nanoparticles. We investigate gadolinium (Gd) doping to influence the growth process as well as magnetic properties of magnetite nanocrystals via a simple co-precipitation method under mild conditions in aqueous media. Gd doping was found to affect the growth process leading to synthesis of controllable particle sizes under the conditions tested (0–10 at% Gd3+). Typically, undoped and 5 at% Gd-doped magnetite nanoparticles were found to have crystal sizes of about 18 and 44 nm, respectively, supported by X-ray diffraction and transmission electron microscopy. These results showed that Gd-doped nanoparticles retained the magnetite crystal structure, with Gd3+ randomly incorporated in the crystal lattice, probably in the octahedral sites. The composition of 5 at% Gd-doped magnetite was Fe(3-x)GdxO4 (x=0.085±0.002), as determined by inductively coupled plasma mass spectrometry. 5 at% Gd-doped nanoparticles exhibited ferrimagnetic properties with small coercivity (~65 Oe) and slightly decreased magnetization at 260 K in contrast to the undoped, superparamagnetic magnetite nanoparticles. Templation by the bacterial biomineralization protein Mms6 did not appear to affect the growth of the Gd-doped magnetite particles synthesized by this method.},
doi = {10.1016/j.jmmm.2016.10.005},
url = {https://www.osti.gov/biblio/1355752}, journal = {Journal of Magnetism and Magnetic Materials},
issn = {0304-8853},
number = C,
volume = 423,
place = {United States},
year = {2016},
month = {10}
}

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    Works referencing / citing this record:

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