Author ORCID Identifier

https://orcid.org/0000-0003-3188-5270

https://orcid.org/0000-0003-2111-3410

https://orcid.org/0000-0003-3423-0114

Document Type

Article

Publication Date

2019

Department/Program/Center

Physics and Astronomy

Abstract

The engineering of materials with controlled magnetic properties by means other than a magnetic feld is of great interest in nanotechnology. In this study, we report engineered magnetic graphene oxide (MGO) in the nanocomposite form of iron oxide nanoparticles (IO)-graphene oxide (GO) with tunable core magnetism and magnetic resonance transverse relaxivity (r2). These tunable properties are obtained by varying the IO content on GO. The MGO series exhibits r2 values analogous to those observed in conventional single core and cluster forms of IO in diferent size regimes—motional averaging regime (MAR), static dephasing regime (SDR), and echo-limiting regime (ELR) or slow motion regime (SMR). The maximum r2 of 162±5.703mM−1s−1 is attained for MGO with 28 weight percent (wt%) content of IO on GO and hydrodynamic diameter of 414 nm, which is associated with the SDR.These fndings demonstrate the clear potential of magnetic graphene oxide for magnetic resonance imaging (MRI) applications.

Source Citation

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

Comments

Thapa, B., Diaz-Diestra, D., Badillo-Diaz, D., Sharma, R. K., Dasari, K., Kumari, S., Holcomb, M. B., Beltran-Huarac, J., Weiner, B. R., & Morell, G. (2019). Controlling the transverse proton relaxivity of magnetic graphene oxide. Scientific Reports, 9(1). https://doi.org/10.1038/s41598-019-42093-1

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