#FUNCTIONALIZED CORE SHELL NANOPARTICLES SERIES#
#FUNCTIONALIZED CORE SHELL NANOPARTICLES FREE#

#FUNCTIONALIZED CORE SHELL NANOPARTICLES FREE#

In this work, a mild organic reaction based on succinic acid peroxide was used to generate and covalently attach carboxyl terminated free alkyl radicals as functional groups to the carbon shell of nanoparticles. Continuing search for simple efficient methods to introduce organic functional groups capable of further modification tailoring the nanoparticle properties towards specific applications is an active field of research. This process is nevertheless limited to bonding only the aryl moieties to carbon shell surface of nanoparticles. Different functional groups, e.g., amino, hydroxyl, alkyne, or maleimido groups, have been covalently bonded to nanoparticles through a two-step reaction with aryl diazonium salts. Strong chemical interaction between the surface carbon network and the functional groups through a covalent carbon-carbon bonding is preferred. The oxidative functionalization process is however accompanied by oxidation of Fe core in particles and decrease of superparamagnetic properties. These methods involve either non-covalent functionalization by physical adsorption of chemical compounds, such as polymers, or oxidative route to covalently introduce functional groups.

#FUNCTIONALIZED CORE SHELL NANOPARTICLES SERIES#

A series of methods for functionalization of carbon materials and carbon based nanoparticles have been developed. The presence of carbon shell provides opportunities to introduce functional groups on the carbon surface. The carbon shell also facilitates the particles to be stable to chemical environments and treatment procedures. The presence of carbon shell in the core-shell nanostructures is very important since such shell acts as a protective coating to magnetic cores against chemical components of biological fluids and is inert to pH changes. For example, the carbon coated Fe nanoparticles, which exhibit strong superparamagnetic properties, have been used as MRI contrast enhancement agents. Moreover, SPIONs are also susceptible to the change in pH and ion concentration in biological fluids.Īlternative materials having higher superparamagnetic properties, such as iron carbides and carbon-coated Fe, were recently explored. However, with the increase in loading of polymers, the activity of SPIONs decreases. In order to stabilize these particles in colloidal systems, a suitable polymer attachment/loading or chemical treatment has been implemented. Magnetic properties of these materials are strongly influenced by colloidal dispersion and particle size. Superparamagnetic iron oxide nanoparticles (SPIONs) in the form of magnetite (Fe 3O 4) and maghemite (γ-Fe 2O 3) have been commonly used for this purpose. Magnetic nanoparticles create tremendous interests largely because of their unique properties towards biomedical applications for cancer treatment that combine a targeted drug delivery and hyperthermia. A detailed physicochemical characterization of the microstructure, magnetic and fluorescence properties of the synthesized hybrid nanoparticles is provided. Further, covalently functionalized core-shell nanoparticles were coated with the amorphous carbon nitride (CN x) generated by an in-situ solution-based chemical reaction of cyanuric chloride with lithium nitride. The method utilizes the organic acyl peroxide of dicarboxylic acid (succinic acid peroxide) as a non-oxidant functional free radical precursor for functionalization. Superparamagnetic core-shell nanoparticles were used as the template material in the synthesis, where the carbon shell was functionalized through one-step free-radical addition of alkyl groups terminated with carboxylic acid moieties. The combination of magnetic and fluorescent properties of core-shell x nanoparticles opens opportunities for their application as sensors and magnet manipulated reusable photocatalysts.

x also exhibits photocatalytic activities for organic dye degradation comparable to pure amorphous CN x with reusability through magnetic separation. The prepared x hybrid nanoparticles were found to possess multifunctionality by exhibiting strong superparamagnetic properties and bright fluorescence emissions at 500 nm after the excitation with light in the UV-visible range. Synthesis and characterization of hybrid fluorescent superparamagnetic core-shell particles of x composition are presented for the first time.

Functionalized core shell nanoparticles