Sonochemical magnetite encapsulation in silica at low irradiation power

Simple Sonochemical Method to Optimize the Heating Efficiency of Magnetic Nanoparticles for Magnetic Fluid Hyperthermia

“…First, the FTIR spectra of all of the samples, M1–M4 ( Figure 2 a), show a broad band centered at 3420 cm –1 , which is due to the coordinated O–H groups in the stretching mode, and the localized peak at 1630 cm –1 corresponds to free surface OH– groups, as expected in synthesis routes that use Na(OH) as the reducing agent in aqueous media. 30 The peaks attributed to the S=O stretching modes of sulfate and sulfoxide groups can be observed at 1350 and 1030 cm –1 , respectively. 31 , 32 The presence of these bands suggests the presence of residual sulfate ions that were not removed in the washing process.…”

Patchy Core/Shell, Magnetite/Silver Nanoparticles via Green and Facile Synthesis: Routes to Assure Biocompatibility

“…Top–down routes are not as popular mainly because the resulting materials exhibit pre-defined and fixed patchiness, and they rely on sophisticated equipment for manufacturing and processing [ 17 , 19 , 20 ]. Some of the bottom–up synthesis schemes include electrochemical, sonochemical, and thermal decomposition, which require high energy levels and controlled conditions such as inert atmospheres [ 21 , 22 , 23 ]. For example, the electrochemical synthesis to manufacture silver shells on gold nanoparticles and the sonochemical route to synthesize magnetite core with a deposition of superficial silica [ 21 , 22 , 23 ].…”

“…Some of the bottom-up synthesis schemes include electrochemical, sonochemical, and thermal decomposition, which require high energy levels and controlled conditions such as inert atmospheres [21][22][23]. For example, the electrochemical synthesis to manufacture silver shells on gold nanoparticles and the sonochemical route to synthesize magnetite core with a deposition of superficial silica [21][22][23].…”

Controlled synthesis of monodisperse core–shell γ‐Fe 2 O 3 @SiO 2 nanoparticles with well‐dispersed γ‐Fe 2 O 3 seeds

“…The band at 948 cm −1 corresponds to the Si–O stretching vibrations in the Si–OH bond. The asymmetric stretching, symmetric stretching, and bending vibrations of Si–O–Si bond are responsible for the band at 1090, 792, and 460 cm −1 , respectively [2, 10]. It indicates that the framework of silica has been formed.…”

“…1. Introduction: Superparamagnetic iron oxide (IO) nanoparticles are of great interest for researchers because of their potential use in the various bio-medical fields, including drug delivery, magnetic cell labelling, separation and tracking, and magnetic resonance imaging contrast agent [1,2]. Although pure superparamagnetic IO magnetic nanoparticles have many advantages, its physical properties also lead to many limitations in its application: (i) they are highly prone to form large aggregates because of their large surface area and high surface energy, (ii) they can be rapidly oxidised and lose magnetism when they are directly exposed to biological systems.…”