Functionalization of Cobalt Ferrite Nanoparticles by a Vitamin C-Assisted Covering with Gold

Nanomaterials and Nanotechnology

KÄ™stutis Mažeika¹  Aldona JagminienÄ—¹  Rokas Kondrotas¹  AgnÄ— MikalauskaitÄ—¹  ArÅ«nas Jagminas¹  Marija KurtinaitienÄ—¹ 

关键词: Magnetic Nanoparticles;    Co-ferrite;    Gold Deposition;    Characterization;   

DOI  :  10.5772/58453

来源: InTech

【 摘 要 】

We report the design and methodology for functionalization of the surface of small Co-ferrite nanoparticles with a mean size of up to 5.0 nm through the attachment of vitamin C molecules initiating [AuCl4]− reduction and the subsequent deposition of gold. By this method, Co-ferrite-Au nanoparticles have been fabricated for the first time in a simple and controllable manner, consisting of the determination of the consumed ascorbic acid content. The sequential addition of vitamin C and HAuCl4 to the ferrofluid at low concentrations leads to the formation of a gold shell on the ferrite core. This approach avoids the additional stabilization of ferrite nanoparticles before gold deposition, and is of great importance in view of the preparation of biodegradable superparamagnetic particles for nanomedicine applications.The deposition of gold onto the ferrite surface was proved herein by UV-vis absorption and energy-dispersive X-ray (EDX) spectroscopy, inductively coupled plasma mass spectrometry analysis, atomic...

【 授权许可】

Unknown