superparamagnetism – TechConnect Briefs

Effect of nucleating agents on magnetic properties and relaxation in magnetite-based glass-ceramics prepared by controlled crystallization of borosilicate glasses

Sandu V., Cimpoiasu E., Greculeasa S., Kuncser A., Kuncser V., Nicolescu M.S., Kuncser A., Kuncser V., U.S. Naval Academy, US

We investigated the specific magnetic structure and magnetic relaxation phenomena in magnetite nano-entities grown in a glassy matrix by controlled crystallization of Fe-containing borosilicate and boroaluminosilicate glasses in the presence of two types of nucleating [...]

Beta-glucosidase immobilization on synthetic superparamagnetic magnetite nanoparticles and their application in saccharification of wheat straw and Eucalyptus globulus pulps

Valenzuela R., Castro J.F., Parra M.C., Baeza J., Free J., Biotechnology Center, University of Concepcion, CL

Beta-glucosidase from T. reesei was successfully immobilized on synthetic superparamagnetic magnetite (Fe3O4) nanoparticles with a mean diameter of 10 nm, silanized and amino-functionalized with 3-aminopropyltriethoxysilane (3-APTS). When silanized and coated the saturation magnetization decreased from [...]

Beta-glucosidase immobilization on synthetic superparamagnetic magnetite nanoparticles and their application in saccharification of wheat straw and Eucalyptus globulus pulps

Valenzuela R., Castro J.F., Parra M.C., Baeza J., Free J., Biotechnology Center, University of Concepcion, CL

Beta-glucosidase from T. reesei was successfully immobilized on synthetic superparamagnetic magnetite (Fe3O4) nanoparticles with a mean diameter of 10 nm, silanized and amino-functionalized with 3-aminopropyltriethoxysilane (3-APTS). When silanized and coated the saturation magnetization decreased from [...]

Immobilization of Enzymes on Functionalized Magnetic Nanoparticles for Efficient Biocatalysis

Wang D.I.C., Wang W., Li Z., Wang D.I.C., Wang W., National University of Singapore, SG

In this paper, iron oxide magnetic nanoparticles were synthesized by co-precipitation method and were functionalized with aldehyde group. Spherical superparamagnetic nanoparticles with diameter of 100 nm were obtained based on the results of field emission [...]

Magnetic Properties Of Iron-Filled Multiwalled Carbon Nanotubes

Aguiló-Aguayo N., García-Céspedes J., Pascual E., Bertran E., IN2UB, Universitat de Barcelona, ES

Magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. Hysteretic and temperature dependent magnetic responses reveal a superparamagnetic behaviour at temperatures below 150ºC. The saturation magnetization of the nanowires at 5K is found to [...]