Nanomaterials

1. Magnetic material (link)

At the Institute of Environmental Protection and Sensors, IOS Ltd., we do research and development of a wide range of different doped and undoped silica magnetic nanomaterials based on spinel iron oxides, with different average size of nanoparticles and varying morphology and tailored physico-chemical properties for use in various fields of biomedicine, technology and environmental protection. Magnetic nano-materials are available in various forms, for example as dry powders, surface functionalized powders or as dispersions in water or organic solvents.

Some examples

Type of material:

  • Maghemite (y-Fe2O3)
  • Cobalt ferrite (CoFe2O4)
  • Mn-ferrite (MnFe2O4)
  • Zn-ferrite (ZnFe2O4)
  • MnZnFe2O4

Some physico-chemical properties of powder materials:

  • The average size of primary nanoparticles (nm): < 100
  • The specific surface of the nanomaterial (m2 /g): < 200
  • The morphology of nanoparticles: relatively spherical
  • Crystallographic properties: cubic spinel crystal structure, spatial symmetry Fd3m
  • Specific nanoparticles magnetization (emu / g): < 80
  • Magnetic properties: superparamagnetic, ferromagnetic, ferrimagnetic character

2. The non-magnetic materials (link)

The Institute of Environmental Protection and Sensors, IOS Ltd., is engaged in research and development of a wide range of non-magnetic semiconductor materials with different particle size and different morphology. Nanomaterials, made at the company IOS Ltd., are available in various forms such as powder materials, surface treated powders or as dispersion in an aqueous or organic medium.

Some examples

Type of material:

  • Zinc oxide (ZnO)
  • Silicon dioxide (SiO2)
  • Titanium dioxide (TiO2)

Some physico-chemical properties of powder materials:

  • The average size of primary nanoparticles (nm): < 1000
  • The specific surface of the nanomaterial (m2 / g): < 250
  • The morphology of nanoparticles: polymorphic (spherical, cubic etc.)
  • Crystallographic properties: amorphous structure; crystalline structure

3. Surface functionalized materials

The Institute of Environmental Protection and Sensors, IOS Ltd., is engaged in research and development of materials with specific physical properties arising from structural and surface chemical phenomena at the atomic level. Research studies include surface treatment and functionalization of nanostructured materials using modern techniques and the study of the mechanisms and kinetics of surface interactions, which are crucial in the development of the unique final physico-chemical properties of the material and which, consequently, lead to the improvement and development of new applications.

The functionality of the surface of nanostructured materials may be varied and adapted to the form of thin surface coatings based on a variety of (i) organic and polymeric materials with functional groups such as amino, carboxy, hydroxy, mercapto, and the like, and (ii) inorganic oxide materials such as SiO2 , TiO2, and the like.

Some examples:

The core material

Organic surface coating

Inorganic surface coating

SiO2

-SH
-NH2
-COOH

TiO2

Magnetic nanoparticle

-SH
-NH2
-COOH
-hydrocarbons

SiO2
TiO2

TiO2

-SH
-NH2
-COOH

SiO2

ZnO

-NH2
-COOH

SiO2