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Lachowicz D, Stroud J, Hankiewicz JH, Gassen R, Kmita A, Stepień J, Celinski Z, Sikora M, Zukrowski J, Gajewska M, Przybylski M. One-Step Preparation of Highly Stable Copper-Zinc Ferrite Nanoparticles in Water Suitable for MRI Thermometry. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:4001-4018. [PMID: 35573108 PMCID: PMC9097161 DOI: 10.1021/acs.chemmater.2c00079] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/01/2022] [Indexed: 05/03/2023]
Abstract
Superparamagnetic ferrite nanoparticles coated with a polymer layer are widely used for biomedical applications. The objective of this work is to design nanoparticles as a magnetic resonance imaging (MRI) temperature-sensitive contrast agent. Copper-zinc ferrite nanoparticles coated with a poly(ethylene glycol) (PEG) layer are synthesized using a one-step thermal decomposition method in a polymer matrix. The resulting nanoparticles are stable in water and biocompatible. Using Mössbauer spectroscopy and magnetometry, it was determined that the grown nanoparticles exhibit superparamagnetic properties. Embedding these particles into an agarose gel resulted in significant modification of water proton relaxation times T 1, T 2, and T 2* determined by nuclear magnetic resonance measurements. The results of the spin-echo T 2-weighted MR images of an aqueous phantom with embedded Cu0.08Zn0.54Fe2.38O4 nanoparticles in the presence of a strong temperature gradient show a strong correlation between the temperature and the image intensity. The presented results support the hypothesis that CuZn ferrite nanoparticles can be used as a contrast agent for MRI thermometry.
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Affiliation(s)
- Dorota Lachowicz
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - John Stroud
- Center
for the Biofrontiers Institute, University of Colorado Colorado Springs, 1420 Austin Bluffs Pkway, Colorado Springs, Colorado 80918, United States
| | - Janusz H. Hankiewicz
- Center
for the Biofrontiers Institute, University of Colorado Colorado Springs, 1420 Austin Bluffs Pkway, Colorado Springs, Colorado 80918, United States
| | - River Gassen
- Center
for the Biofrontiers Institute, University of Colorado Colorado Springs, 1420 Austin Bluffs Pkway, Colorado Springs, Colorado 80918, United States
| | - Angelika Kmita
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - Joanna Stepień
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - Zbigniew Celinski
- Center
for the Biofrontiers Institute, University of Colorado Colorado Springs, 1420 Austin Bluffs Pkway, Colorado Springs, Colorado 80918, United States
| | - Marcin Sikora
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - Jan Zukrowski
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - Marta Gajewska
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
| | - Marek Przybylski
- Academic
Centre for Materials and Nanotechnology, AGH University of Science
and Technology, 30-059 Krakow, Poland
- Faculty
of Physics and Applied Computer Science, AGH University of Science
and Technology, 30-059 Krakow, Poland
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Magnetic and Electronic Properties of Heavy Lanthanides (Gd, Tb, Dy, Er, Ho, Tm). CRYSTALS 2021. [DOI: 10.3390/cryst11020082] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Rare earth metals (REM) occupy a special and important place in our lives. This became especially noticeable during the rapid development of industry in the industrial era of the twentieth century. The tendency of development of the rare-earth metals market certainly remains in the XXI century. According to experts estimates the industry demand for chemical compounds based on them will tend to grow during the nearest years until it reaches the market balance. At the same time, the practical use of high-purity rare-earth metals requires the most accurate understanding of the physical properties of metals, especially magnetic ones. Despite a certain decline in interest in the study of high-purity REM single crystals during the last decade, a number of scientific groups (Ames Lab, Lomonosov Moscow State University (MSU), Baikov Institute of Metallurgy and Materials Science Russian Academy of Science (RAS)) are still conducting high-purity studies on high-purity metal samples. The present article is a combination of a review work covering the analysis of the main works devoted to the study of heavy REMs from gadolinium to thulium, as well as original results obtained at MSU. The paper considers the electronic properties of metals in terms of calculating the density of states, analyzes the regularities of the magnetic phase diagrams of metals, gives the original dependences of the Neel temperature and tricritical temperatures for Gd, Tb, Dy, Er, Ho, Tm, and also introduces a phenomenological parameter that would serve as an indicator of the phase transformation in heavy REMs.
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Chzhan V, Tereshina I, Burkhanov G, Politova G, Drulis H. Magnetic phase diagrams of Gd-H, Tb-H, Dy-H systems. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201818505011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study the impact of hydrogen impurity on the magnetic phase transition temperatures of the high purity rare-earth metals Gd, Tb and Dy. Prior to hydrogenation, the rare earths were purified by the vacuum distillation method. Hydrogenation was carried out using a Sievert-type apparatus. Magnetic phase diagrams were constructed based on the thermomagnetic analysis.
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