Coating Effect on the 1H—NMR Relaxation Properties of Iron Oxide Magnetic Nanoparticles
Abstract
:1. Introduction
2. Materials and Methods
2.1. Tuning the Coating of Maghemite Nanoparticles
2.1.1. Polyelectrolytes Serving as MNP Coatings
2.1.2. Fabrication Procedure of Magnetic Nanoparticles
2.2. Characterization Methods
Experimental Details
3. Results and Discussion
3.1. Nanoparticles Synthesis
3.2. Morphological Characterization
3.3. Magnetic Measurements
3.4. 1H NMR Relaxation
3.4.1. Experimental Data
17 nm MNPs (1st Series)
8 nm MNPs (2nd Series)
3.4.2. Analysis of NMR Results
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample | dTEM nm |
---|---|
first series samples | 17.0 ± 2.5 |
second series samples | 8.0 ± 0.4 |
Sample | Frequency | r1 (s−1mM−1) | r2 (s−1mM−1) | r2/r1 |
---|---|---|---|---|
A-17 | 60 MHz | 12.4 (1.0) | 396.8 (31.7) | 32 |
15 MHz | 48.4 (3.9) | 396.8 (31.7) | 8.2 | |
B-17 | 60 MHz | 11.3 (0.9) | 285.7 (22.8) | 25.3 |
15 MHz | 47.1 (3.8) | 314.9 (25.2) | 6.7 | |
C-17 | 60 MHz | 10.9 (0.9) | 398.7 (31.9) | 36.6 |
15 MHz | 44.5 (3.6) | 365.5 (29.2) | 8.2 | |
D-17 | 60 MHz | 12.6 (1.0) | 401.8 (32.1) | 31.9 |
15 MHz | 49.9 (4.0) | 381.7 (30.5) | 7.6 | |
Endorem | 60 MHz | 12.3 (1.0) | 131.6 (10.5) | 10.7 |
15 MHz | 27.5 (2.2) | 138.9 (11.1) | 5 |
Sample | Frequency | r1 (s−1mM−1) | r2 (s−1mM−1) | r2/r1 |
---|---|---|---|---|
A-8 | 60 MHz | 14.7 (1.2) | 121.0 (9.7) | 8.2 |
15.1 MHz | 42.5 (3.4) | 116.7 (9.3) | 2.7 | |
B-8 | 60 MHz | 14.7 (1.2) | 123.7 (9.9) | 8.4 |
15.1 MHz | 45.1 (3.6) | 121.1 (9.7) | 2.7 | |
C-8 | 60 MHz | 14.5 (1.2) | 123.1 (9.9) | 8.5 |
15.1 MHz | 43.6 (3.5) | 122.13 (9.8) | 2.8 | |
D-8 | 60 MHz | 14.9 (1.2) | 126.7 (10.1) | 8.5 |
15.1 MHz | 46.2 (3.7) | 131.9 (10.6) | 2.9 | |
Endorem | 60 MHz | 12.3 (1.0) | 131.6 (10.5) | 10.7 |
15 MHz | 27.5 (2.2) | 138.9 (11.1) | 5 |
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Brero, F.; Basini, M.; Avolio, M.; Orsini, F.; Arosio, P.; Sangregorio, C.; Innocenti, C.; Guerrini, A.; Boucard, J.; Ishow, E.; et al. Coating Effect on the 1H—NMR Relaxation Properties of Iron Oxide Magnetic Nanoparticles. Nanomaterials 2020, 10, 1660. https://doi.org/10.3390/nano10091660
Brero F, Basini M, Avolio M, Orsini F, Arosio P, Sangregorio C, Innocenti C, Guerrini A, Boucard J, Ishow E, et al. Coating Effect on the 1H—NMR Relaxation Properties of Iron Oxide Magnetic Nanoparticles. Nanomaterials. 2020; 10(9):1660. https://doi.org/10.3390/nano10091660
Chicago/Turabian StyleBrero, Francesca, Martina Basini, Matteo Avolio, Francesco Orsini, Paolo Arosio, Claudio Sangregorio, Claudia Innocenti, Andrea Guerrini, Joanna Boucard, Eléna Ishow, and et al. 2020. "Coating Effect on the 1H—NMR Relaxation Properties of Iron Oxide Magnetic Nanoparticles" Nanomaterials 10, no. 9: 1660. https://doi.org/10.3390/nano10091660