Synthesis of gold-coated iron oxide nanoparticles

Abstract A microemulsion method has been used for the synthesis of iron oxide nanoparticles and its aqueous stabilization. Iron oxide nanoparticles of 9±2 nm in size were then coated with gold in a second step. For this purpose HAuCl 4 was reduced employing glucose as a reducing agent. The mild conditions promote the reduction of Au ions adsorbed onto the γ-Fe 2 O 3 particles in order to ensure a controlled shell growth of gold, and avoiding the formation of new gold nuclei. Different molar ratios of HAuCl 4 /glucose were investigated. The obtained core–shell structures have been characterized by TEM, UV spectroscopy, XRD and Magnetometry measurements.

[1]  T Andrew Taton.  Two-way traffic , 2003, Nature materials.

[2]  A. Arrott,et al.  Magnetism in Medicine , 1960 .

[3]  S. Nie,et al.  Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules , 2001, Nature Biotechnology.

[4]  W. Statton,et al.  Structure in Vitreous Silicate Fibers as Shown by Small‐Angle Scattering of X‐Rays , 1960 .

[5]  Carl K. Hoh,et al.  Targeting and retention of magnetic targeted carriers (MTCs) enhancing intra-arterial chemotherapy , 1999 .

[6]  K. Birdi,et al.  Handbook of Surface and Colloid Chemistry , 2002 .

[7]  J. Rivas,et al.  Synthesis of silver-coated magnetite nanoparticles , 2007 .

[8]  Christine M. Micheel,et al.  Biological applications of colloidal nanocrystals , 2003 .

[9]  Jin Luo,et al.  Iron oxide-gold core-shell nanoparticles and thin film assembly , 2005 .

[10]  José Rivas,et al.  Advances in the Preparation of Magnetic Nanoparticles by the Microemulsion Method , 1997 .

[11]  R. Gilchrist,et al.  Selective Inductive Heating of Lymph Nodes , 1957, Annals of surgery.

[12]  Tarasankar Pal,et al.  Magnetite nanoparticles with tunable gold or silver shell. , 2005, Journal of colloid and interface science.

[13]  Jin Luo,et al.  Monodispersed core-shell Fe3O4@Au nanoparticles. , 2005, The journal of physical chemistry. B.

[14]  C. Haberzettl,et al.  INSTITUTE OF PHYSICS PUBLISHING NANOTECHNOLOGY Nanotechnology 13 (2002) R9–R13 PII: S0957-4484(02)38410-1 Tutorial Nanomedicine: destination or journey? , 2022 .

[15]  J. Rivas,et al.  Synthesis of monodisperse maghemite nanoparticles by the microemulsion method , 2006 .

[16]  R. Grigorovici,et al.  Optical Properties and Electronic Structure of Amorphous Germanium , 1966, 1966.