Magnetic iron oxide nanoparticles (IONs) with controlable physicochemical and magnetic properties were synthesized by a fast and simple solvothermal microwave (MW) assisted approach. The MW-assisted synthesis using a coaxial microwave antenna was carried out in different routes: i) a fast one-step solvothermal approach, and ii) a non-aqueous sol-gel system. This innovative configuration obtained IONs maghemite crystal phase, in a very short reaction time (from 5 to 15 min), with a small size (6nm) and narrow particle size distribution. Magnetization as a function of the applied magnetic field revealed that all the samples showed superparamagnetims, with a saturation magnetization ranging from 60 to 68 emu/g (T=300K). TEM, XRD, FTIR, TG, and magnetic measurements were used to fully characterize the IONs. Not only did the proposed methodologies using the coaxial MW configuration produce IONs with similar or improved physicochemical and magnetic properties, but they also overcame the classical drawbacks of oven-type MW configurations.

A simple and versatile solvothermal configuration to synthesize superparamagnetic iron oxide nanoparticles using a coaxial microwave antenna

SPEPI, ALESSIO;DUCE, CELIA;GONZALEZ RIVERA, JOSE;DOMENICI, VALENTINA;PINEIDER, FRANCESCO;TINE', MARIA ROSARIA
2016

Abstract

Magnetic iron oxide nanoparticles (IONs) with controlable physicochemical and magnetic properties were synthesized by a fast and simple solvothermal microwave (MW) assisted approach. The MW-assisted synthesis using a coaxial microwave antenna was carried out in different routes: i) a fast one-step solvothermal approach, and ii) a non-aqueous sol-gel system. This innovative configuration obtained IONs maghemite crystal phase, in a very short reaction time (from 5 to 15 min), with a small size (6nm) and narrow particle size distribution. Magnetization as a function of the applied magnetic field revealed that all the samples showed superparamagnetims, with a saturation magnetization ranging from 60 to 68 emu/g (T=300K). TEM, XRD, FTIR, TG, and magnetic measurements were used to fully characterize the IONs. Not only did the proposed methodologies using the coaxial MW configuration produce IONs with similar or improved physicochemical and magnetic properties, but they also overcame the classical drawbacks of oven-type MW configurations.
Spepi, Alessio; Duce, Celia; Ferrari, Carlo; GONZALEZ RIVERA, Jose; Jagličić, Zvonko; Domenici, Valentina; Pineider, Francesco; Tine', MARIA ROSARIA
File in questo prodotto:
File Dimensione Formato  
RSCadv2016IONs.pdf

solo utenti autorizzati

Tipologia: Versione finale editoriale
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.68 MB
Formato Adobe PDF
1.68 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/812110
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 8
  • ???jsp.display-item.citation.isi??? 9
social impact