Improvement of Thermal Stability of Maghemite Nanoparticles Coated with Oleic Acid and Oleylamine Molecules: Investigations under Laser Irradiation

We investigated the influence of the coating of maghemite nanoparticles (NPs) with oleic acid and oleylamine molecules on the thermal stability of maghemite and on the gamma -> alpha-Fe2O3 phase transformation. The uncoated maghemite NPs were synthesized by coprecipitation and the coated NPs by thermal decomposition of organometallic precursors. The morphology and size of the coated NPs were characterized by transmission electron microscopy and magnetic and structural properties by Fe-57 Mossbauer and Raman spectroscopies. The phase stability of coated maghemite NPs was examined under in situ laser irradiation by Raman spectroscopy. The results indicate that coated gamma-Fe2O3 NPs are thermally more stable than the uncoated NPs: the phase transformation of maghemite into hematite was observed at 15 mW for uncoated NPs of 4 nm, whereas it occurs at 120 mW for the coated NPs of similar size. The analysis of the Raman baseline profile reveals clearly that the surface coating of maghemite NPs results both in reducing the number of surface defects of nanoparticles and in delaying this phase transition.

[1]  H. Pizem,et al.  Alkyl Phosphonate/Phosphate Coating on Magnetite Nanoparticles: A Comparison with Fatty Acids , 2001 .

[2]  P. Moroz,et al.  Status of hyperthermia in the treatment of advanced liver cancer , 2001, Journal of surgical oncology.

[3]  S. Dutz,et al.  INSTITUTE OF PHYSICS PUBLISHING JOURNAL OF PHYSICS: CONDENSED MATTER , 2005 .

[4]  S. P. Verma,et al.  Raman spectra of some saturated, unsaturated and deuterated C18 fatty acids in the HCH-deformation and CH-stretching regions. , 1977, Biochimica et biophysica acta.

[5]  Jinda Fan,et al.  Superparamagnetic nanoparticle-supported catalysis of Suzuki cross-coupling reactions. , 2005, Organic letters.

[6]  Kiyotaka Sato,et al.  Vibrational spectroscopic study on polymorphism and order-disorder phase transition in oleic acid , 1986 .

[7]  Ralph Weissleder,et al.  Magnetic sensors for protease assays. , 2003, Angewandte Chemie.

[8]  C. Orendorff,et al.  Quantitative Correlation of Raman Spectral Indicators in Determining Conformational Order in Alkyl Chains. , 2002, The journal of physical chemistry. A.

[9]  R. Massart,et al.  Preparation of aqueous magnetic liquids in alkaline and acidic media , 1981 .

[10]  N. Labhsetwar,et al.  Synthesis and Magnetic Characterization of Zinc Ferrite Nanoparticles with Different Environments: Powder, Colloidal Solution, and Zinc Ferrite−Silica Core−Shell Nanoparticles , 2002 .

[11]  T. Aubert,et al.  Multifunctional hybrid silica nanoparticles based on [Mo₆Br₁₄]²⁻ phosphorescent nanosized clusters, magnetic γ-Fe₂O₃ and plasmonic gold nanoparticles. , 2014, Journal of colloid and interface science.

[12]  Takeshi Kobayashi,et al.  Heat Properties of Magnetoliposomes for Local Hyperthermia , 1994 .

[13]  R. Neubert,et al.  Phase transitions in oleic acid as studied by X-ray diffraction and FT-Raman spectroscopy , 2000 .

[14]  A. Nakamura,et al.  Preparation of magnetite aqueous dispersion for magnetic fluid hyperthermia , 2011 .

[15]  Young-wook Jun,et al.  The President and Society for Analytical Chemistry Gold Medallist , 1973 .

[16]  H. Gu,et al.  Oleic acid coating on the monodisperse magnetite nanoparticles , 2006 .

[17]  J. Greneche.  The Contribution of 57 Fe Mössbauer Spectrometry to Investigate Magnetic Nanomaterials , 2013 .

[18]  A. Gibaud,et al.  Phase transformations in CaCO3/iron oxide composite induced by thermal treatment and laser irradiation , 2013 .

[19]  M. Muhammed,et al.  Cubic versus spherical magnetic nanoparticles: the role of surface anisotropy. , 2008, Journal of the American Chemical Society.

[20]  Yoshio Kobayashi,et al.  Preparation and Properties of Silica-Coated Cobalt Nanoparticles† , 2003 .

[21]  Xiaogang Peng,et al.  Super‐Stable, High‐Quality Fe3O4 Dendron–Nanocrystals Dispersible in Both Organic and Aqueous Solutions , 2005, Advanced materials.

[22]  Soonchil Lee,et al.  Spin Canting of Maghemite Studied by NMR and In-Field Mössbauer Spectrometry , 2010 .

[23]  M. Dresselhaus,et al.  ORIGIN OF DISPERSIVE EFFECTS OF THE RAMAN D BAND IN CARBON MATERIALS , 1999 .

[24]  V. Rotello,et al.  Surface PEGylation and Ligand Exchange Chemistry of FePt Nanoparticles for Biological Applications , 2005 .

[25]  Yongmin Chang,et al.  Poly(D,L-lactide-co-glycolide) coated superparamagnetic iron oxide nanoparticles : Synthesis, characterization and in vivo study as MRI contrast agent , 2008 .

[26]  Jinwoo Cheon,et al.  Heterostructured magnetic nanoparticles: their versatility and high performance capabilities. , 2007, Chemical communications.

[27]  J. Robertson,et al.  Interpretation of Raman spectra of disordered and amorphous carbon , 2000 .

[28]  P. Wust,et al.  Hyperthermia in combined treatment of cancer. , 2002, The Lancet Oncology.

[29]  R. E. Watson,et al.  Magnetocaloric effect in superparamagnets , 1992 .

[30]  Z. J. Zhang,et al.  SIZE-DEPENDENT SUPERPARAMAGNETIC PROPERTIES OF MGFE2O4 SPINEL FERRITE NANOCRYSTALLITES , 1998 .

[31]  C. Robic,et al.  Magnetic iron oxide nanoparticles: synthesis, stabilization, vectorization, physicochemical characterizations, and biological applications. , 2008, Chemical reviews.

[32]  Dalva Lúcia Araújo de Faria,et al.  Raman microspectroscopy of some iron oxides and oxyhydroxides , 1997 .

[33]  Etienne Duguet,et al.  Magnetic nanoparticle design for medical applications , 2006 .

[34]  A. Tedesco,et al.  Zinc phthalocyanine/magnetic fluid complex: a promising dual nanostructured system for cancer treatment. , 2006, Journal of nanoscience and nanotechnology.

[35]  Zhiya Ma,et al.  Surface modification and characterization of magnetic polymer nanospheres prepared by miniemulsion polymerization. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[36]  Jean-François Bardeau,et al.  Insights into the Mechanism Related to the Phase Transition from γ-Fe2O3 to α-Fe2O3 Nanoparticles Induced by Thermal Treatment and Laser Irradiation , 2012 .

[37]  J. Greneche,et al.  Spin Canting in γ-Fe2O3 Nanoparticles , 1998 .

[38]  T. Duffy,et al.  Raman spectroscopy of Fe2O3 to 62 GPa , 2002 .

[39]  E. Tronc,et al.  Surface effects on magnetically coupled ”γ-Fe2O3” colloids , 1986 .

[40]  Stéphane Cordier,et al.  Functional silica nanoparticles synthesized by water-in-oil microemulsion processes. , 2010, Journal of colloid and interface science.

[41]  C. O'connor,et al.  Recent advances in the liquid-phase syntheses of inorganic nanoparticles. , 2004, Chemical reviews.

[42]  A. Tedesco,et al.  Synthesis and Characterization of a Magnetic Nanoemulsion as a Promissing Candidate for Cancer Treatment , 2006, INTERMAG 2006 - IEEE International Magnetics Conference.

[43]  I. R. Beattie,et al.  The single-crystal Raman spectra of nearly opaque materials. Iron(III) oxide and chromium(III) oxide , 1970 .

[44]  A. Józefczak,et al.  Study of heating effect and acoustic properties of dextran stabilized magnetic fluid , 2007 .

[45]  Tronc,et al.  Superparamagnetic relaxation of weakly interacting particles. , 1994, Physical review letters.

[46]  Changzhong Jiang,et al.  Magnetic Iron Oxide Nanoparticles: Synthesis and Surface Functionalization Strategies , 2008, Nanoscale research letters.

[47]  Hao Zeng,et al.  Monodisperse MFe2O4 (M = Fe, Co, Mn) nanoparticles. , 2004, Journal of the American Chemical Society.

[48]  Urs O. Häfeli,et al.  Scientific and clinical applications of magnetic carriers , 1997 .

[49]  J. Greneche,et al.  Magnetic Iron Oxide Nanoparticles: Reproducible Tuning of the Size and Nanosized-Dependent Composition, Defects, and Spin Canting , 2014 .

[50]  V. Harris,et al.  Photomagnetism and structure in cobalt ferrite nanoparticles , 2002 .

[51]  Hao Zeng,et al.  Size-controlled synthesis of magnetite nanoparticles. , 2002, Journal of the American Chemical Society.

[52]  Sun,et al.  Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices , 2000, Science.

[53]  J. Greneche,et al.  New evidences of in situ laser irradiation effects on γ-Fe2O3 nanoparticles: a Raman spectroscopic study , 2011 .

[54]  N. Turro,et al.  Spectroscopic Characterization of the Surface of Iron Oxide Nanocrystals , 2005 .

[55]  S. Wartewig,et al.  Normal mode analysis of γ form of oleic acid , 2006 .

[56]  K. Angoni.  A study of highly ordered carbons by use of macroscopic and microscopic Raman spectroscopy , 1998 .