Synthesis and Characterization of Gold-Shell Magnetic Nanowires for Theranostic Applications

Oana Georgiana Dragos-Pinzaru, Gabriela Buema, Dumitru Daniel Herea, Horia Chiriac, Nicoleta Lupu, Anca Emanuela Minuti, George Stoian, Daniel Shore, Valerie C. Pierre, Ibro Tabakovic, Bethanie J.H. Stadler

Research output: Contribution to journalArticlepeer-review


Increasing interest has been given in recent years to alternative physical therapies for cancer, with a special focus on magneto-mechanical actuation of magnetic nanoparticles. The reported findings underline the need for highly biocompatible nanostructures, along with suitable mechanical and magnetic properties for different configurations of alternating magnetic fields. Here, we show how the biocompatibility of magnetic nanowires (MNWs), especially CoFe, can be increased by gold coating, which can be used both in cancer therapy and magnetic resonance imaging (MRI). This study provides a new approach in the field of theranostic applications, demonstrating the capabilities of core–shell nanowires to be used both to increase the cancer detection limit (as T2 contrast agents) and for its treatment (through magneto-mechanical actuation). The MNWs were electrodeposited in alumina templates, whereas the gold layer was electroless-plated by galvanic replacement. The gold-coated CoFe nanowires were biocompatible until they induced high cellular death to human osteosarcoma cells via magneto-mechanical actuation. These same MNWs displayed increased relaxivities (r1, r2). Our results show that the gold-coated CoFe nanowires turned out to be highly efficient in tumor cell destruction, and, at the same time, suitable for MRI applications.

Original languageEnglish (US)
Article number1755
Issue number11
StatePublished - Nov 2022

Bibliographical note

Funding Information:
This work was supported by a grant of the Ministry of Research, Innovation and Digitalization, CNCS-UEFISCDI, project number PN-III-P4-PCE-2021-1395/GreenEn, within PNCDI III (contract No. PCE 110/2022); by a grant of the Ministry of Research, Innovation and Digitization CNCS–UEFISCDI, project number PN-III-P4-PCE-2021-1081 within PNCDI III (contract No. 75/2022); and by (UEFISCDI) contract no. PCE20/2021 (PN-III-P4-ID-PCE-2020-2381).

Publisher Copyright:
© 2022 by the authors.


  • MRI contrast agents
  • cancer therapy
  • electrodeposition
  • gold-coated magnetic nanowires


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