magnetic – TechConnect Briefs

Colored Magnetic Nanoparticles to Improve the Sustainability of Textile Dyeing

Wen J., Sun Y., University of Massachusetts-Lowell, US

Current dyeing techniques face growing environmental and economic challenges due to high consumption of water, salts, auxiliaries and energy, and production of substantial amounts of industrial polluting waste waters. This project demonstrated that colorants can [...]

Carcinoma cellular uptake, imaging, and targeting by RGDS- and TAT-conjugated upconversion and/or magnetic nanoparticles

Horák D., Kostiv U., Proks V., Jirák D., Institute of Macromolecular Chemistry AS CR, CZ

Specific targeting and in vivo visualization of cancer cells is of crucial importance for early detection and treatment of cancer. We have developed monodisperse poly(ethylene glycol) (PEG)-modified SiO2-coated Fe3O4 superparamagnetic nanoparticles [1] with size tuned [...]

Non-conductive ferromagnets based on core double-shell nanocomposites for radio-electric applications

Takacs H., Viala B., Hermán V., Tortai J.-H., Duclairoir F., Alarcon Ramos J., Jouneau P.-H., Okuno H., Tallec G., CEA, FR

We report a novel flexible nanotechnology for consumer product engineering as a complementary approach from solid-state manufacturing techniques based on metallic nanoparticles and graphene chemistries. We describe two chemical routes for producing closely-packed disordered assemblies [...]

Layer by layer polyelectrolyte encapsulation of satellite structured Fe3O4@SiO2-Au magnetic SERS probe for selective detection of food dyes

Sun Z., Jing C., Chinese Academy of Sciences, CN

In situ detection and identification of dyes from a complex chemical mixture presents a great challenge to analytical chemists. Au NPs were uniformly deposited on magnetic Fe3O4@SiO2 bead to form a core-satellite Fe3O4@SiO2-AuNPs (FSPA) hetero-nanostructure, [...]

Multifunctional Nanostructures and Nanoarchitectures

Hunyadi Murph S.E., Savannah River National Laboratory, US

The development of functional nanomaterials with multi-detection modalities opens up new avenues for creating multi-purpose technologies for many applications. The “ideal” nanoparticle would combine multiple detection modalities (magnetic, plasmonic, elastic or inelastic light scattering, fluorescence, [...]

Synthesis and characterization of magnetic manganese ferrites using a simple combustion method and its application in removal of organics

Desai I., Mills M., Nadagouda M., Elovitz M., Boulanger B., U.S. Environmental Protection Agency, US

Ferrospinels have been shown to have promising oxidative and catalytic properties. Our research focuses on novel magnetic manganese ferrite catalysts which have been developed and thoroughly characterized. Their potential application as oxidative catalysts/sorption in removal [...]

Synthesis and characterization of magnetic manganese ferrites using a simple combustion method and its application in removal of organics

Desai I., Mills M., Nadagouda M., Elovitz M., Boulanger B., U.S. Environmental Protection Agency, US

Ferrospinels have been shown to have promising oxidative and catalytic properties. Our research focuses on novel magnetic manganese ferrite catalysts which have been developed and thoroughly characterized. Their potential application as oxidative catalysts/sorption in removal [...]

Reversible and irreversible temperature-induced changes in exchange-biased planar Hall effect bridge (PHEB) magnetic field sensors

Rizzi G., Lundtoft N.C., Østerberg F.W., Hansen M.F., Technical University of Denmark, DK

We generally investigate the use of exchange-biased planar Hall effect bridge (PHEB) magnetic field sensors for biodetection, where the sensors detect the binding and unbinding of magnetic beads to the sensor surface by biomolecular interactions. [...]

Rapid one-step chemical synthesis of polyaniline-manganese ferrite nanocomposites without external initiator and mechanical agitation

Chimamkpam E.F.C., Schweizer T., Schilling A., Ferreira J.M.F., Centre for Research in Ceramics and Composite Materials, PT

We describe a rapid one-step, room temperature method to chemically synthesize bulk quantities of nanocomposites comprising specifically of manganese ferrite (MnFe2O4) and polyaniline (conductive form). Typically a chemical agent, for example ammonium peroxydisulfate, is used [...]

Multifunctional Fe3O4/ZnO core-shell nanoparticles for photodynamic therapy

Beltran J.C., Tomar M.S., Singh S.P., Perales O., Rivera L., Peña S., University of Puerto Rico-Mayagüez, PR

The photodynamic therapy (PDT) based on core-shell structures require efficient luminescence within specific wavelength range, preferably in near infrared. In the present study we aim to create a multifunctional platform for PDT through Fe3O4/ZnO core [...]