Iron Oxide/ Carbon Core Shell Nanoparticles (Fe3O4/C, 99.9%, APS: 80-100nm, Metal Oxide Core)

Iron Oxide/ Carbon Core-Shell Nanoparticles

Introduction

Iron oxide/carbon core-shell nanoparticles are a class of composite nanomaterials where the core is composed of iron oxide (typically magnetite, Fe₃O₄), and the shell consists of a layer of carbon. The combination of superparamagnetic iron oxide and carbon provides these nanoparticles with unique properties, including magnetic responsiveness, chemical stability, biocompatibility, and electrochemical activity.

Applications

Biomedical Applications

Magnetic Targeted Drug Delivery: The superparamagnetic properties of the iron oxide core allow Fe₃O₄@C nanoparticles to be easily directed by an external magnetic field to specific sites within the body, such as tumors or inflammatory tissues. The carbon shell can be functionalized with drugs, proteins, or other therapeutic agents, enabling targeted drug delivery. This results in a more precise therapeutic effect, reducing side effects and improving treatment efficacy.

Magnetic Resonance Imaging (MRI): Due to the magnetic properties of the iron oxide core, Fe₃O₄@C nanoparticles can be used as MRI contrast agents. The iron oxide core enhances the magnetic resonance signal, improving the quality of in vivo imaging and enabling non-invasive diagnosis of tumors, lesions, or other tissue abnormalities. The carbon shell improves the biocompatibility and stability of the nanoparticles in biological systems.

Magnetic Hyperthermia for Cancer Treatment: Fe₃O₄@C nanoparticles can be used in magnetic hyperthermia therapy, where the nanoparticles are exposed to an alternating magnetic field, generating heat to selectively destroy cancer cells. The iron oxide core generates heat under the magnetic field, while the carbon shell offers enhanced stability and can be functionalized to target cancer cells specifically, reducing damage to surrounding healthy tissue.

Biosensing and Diagnostics: The carbon shell can be functionalized with biomolecules (such as antibodies, aptamers, or DNA) for use in biosensing applications. Fe₃O₄@C nanoparticles can be employed as highly sensitive probes for the detection of pathogens, biomarkers, or toxins, with the magnetic properties allowing for easy separation and concentration of target analytes.

Energy Storage and Conversion

Supercapacitors: The carbon shell of Fe₃O₄@C nanoparticles can be utilized in energy storage devices like supercapacitors. The conductivity of carbon enhances the charge-discharge efficiency of the device, while the iron oxide core contributes to high capacitance.