{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T09:51:20Z","timestamp":1771062680046,"version":"3.50.1"},"reference-count":79,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2019,9,24]],"date-time":"2019-09-24T00:00:00Z","timestamp":1569283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006280","name":"Ministerio de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["MAT2017-86616-R"],"award-info":[{"award-number":["MAT2017-86616-R"]}],"id":[{"id":"10.13039\/501100006280","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006280","name":"Ministerio de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["SEV-2015-0496"],"award-info":[{"award-number":["SEV-2015-0496"]}],"id":[{"id":"10.13039\/501100006280","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100006280","name":"Ministerio de Ciencia y Tecnolog\u00eda","doi-asserted-by":"publisher","award":["SEV-2017-0706"],"award-info":[{"award-number":["SEV-2017-0706"]}],"id":[{"id":"10.13039\/501100006280","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Magnetic resonance imaging (MRI) is a useful tool for disease diagnosis and treatment monitoring. Superparamagnetic iron oxide nanoparticles (SPION) show good performance as transverse relaxation (T2) contrast agents, thus facilitating the interpretation of the acquired images. Attachment of SPION onto nanocarriers prevents their agglomeration, improving the circulation time and efficiency. Graphene derivatives, such as graphene oxide (GO) and reduced graphene oxide (RGO), are appealing nanocarriers since they have both high surface area and functional moieties that make them ideal substrates for the attachment of nanoparticles. We have employed a fast, simple and environmentally friendly microwave-assisted approach for the synthesis of SPION-RGO hybrids. Different iron precursor\/GO ratios were used leading to SPION, with a median diameter of 7.1 nm, homogeneously distributed along the RGO surface. Good relaxivity (r2*) values were obtained in MRI studies and no significant toxicity was detected within in vitro tests following GL261 glioma and J774 macrophage-like cells for 24 h with SPION-RGO, demonstrating the applicability of the hybrids as T2-weighted MRI contrast agents.<\/jats:p>","DOI":"10.3390\/nano9101364","type":"journal-article","created":{"date-parts":[[2019,9,25]],"date-time":"2019-09-25T03:51:18Z","timestamp":1569383478000},"page":"1364","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Microwave-Assisted Synthesis of SPION-Reduced Graphene Oxide Hybrids for Magnetic Resonance Imaging (MRI)"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1048-8869","authenticated-orcid":false,"given":"Marina","family":"Llenas","sequence":"first","affiliation":[{"name":"Institut de Ci\u00e8ncia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra (Barcelona), Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0050-7501","authenticated-orcid":false,"given":"Stefania","family":"Sandoval","sequence":"additional","affiliation":[{"name":"Institut de Ci\u00e8ncia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra (Barcelona), Spain"}]},{"given":"Pedro M.","family":"Costa","sequence":"additional","affiliation":[{"name":"Institute of Pharmaceutical Science, King\u2019s College London, London SE1 9NH, UK"}]},{"given":"Judith","family":"Or\u00f3-Sol\u00e9","sequence":"additional","affiliation":[{"name":"Institut de Ci\u00e8ncia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra (Barcelona), Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8127-6425","authenticated-orcid":false,"given":"Silvia","family":"Lope-Piedrafita","sequence":"additional","affiliation":[{"name":"Servei de Resson\u00e0ncia Magn\u00e8tica Nuclear, Universitat Aut\u00f2noma de Barcelona, Campus UAB, 08193 Bellaterra (Barcelona), Spain"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red-Bioingenier\u00eda, Biomateriales y Nanomedicina (CIBER-BBN), Universitat Aut\u00f2noma de Barcelona, Campus UAB, 08193 Bellaterra (Barcelona), Spain"}]},{"given":"Bel\u00e9n","family":"Ballesteros","sequence":"additional","affiliation":[{"name":"Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and the Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona), Spain"}]},{"given":"Khuloud T.","family":"Al-Jamal","sequence":"additional","affiliation":[{"name":"Institute of Pharmaceutical Science, King\u2019s College London, London SE1 9NH, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7116-2152","authenticated-orcid":false,"given":"Gerard","family":"Tobias","sequence":"additional","affiliation":[{"name":"Institut de Ci\u00e8ncia de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra (Barcelona), Spain"}]}],"member":"1968","published-online":{"date-parts":[[2019,9,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2678","DOI":"10.1016\/j.apt.2018.07.017","article-title":"Iron-based magnetic nanoparticles for magnetic resonance imaging","volume":"29","author":"Fatima","year":"2018","journal-title":"Adv. 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