Sol gel synthesis of nanoparticles - SlideShare

An H2O2-assisted, sol-gel synthesis route to precursors to magnesium silicate thin films is described. Films having ratios of Mg to Si from 1 to 3 were prepared by spin-coating. On substrates such as silicon, aluminum, steel, glass, and fused silica, repeated coatings were applied, without intermittent treatment, to give ∼0.5 μm thick films. Crack-free consolidation was achieved by conventional or microwave heating. Densification of the films on silicon was studied by IR spectroscopy, ellipsometry, and microhardness measurements; IR analysis indicated that these films were amorphous to at least 750°C. At high enough temperatures, durable films were obtained that exhibited antireflective properties.

T1 - Sol-Gel Synthesis and Characterization of Magnesium Silicate Thin Films

AB - An H2O2-assisted, sol-gel synthesis route to precursors to magnesium silicate thin films is described. Films having ratios of Mg to Si from 1 to 3 were prepared by spin-coating. On substrates such as silicon, aluminum, steel, glass, and fused silica, repeated coatings were applied, without intermittent treatment, to give ∼0.5 μm thick films. Crack-free consolidation was achieved by conventional or microwave heating. Densification of the films on silicon was studied by IR spectroscopy, ellipsometry, and microhardness measurements; IR analysis indicated that these films were amorphous to at least 750°C. At high enough temperatures, durable films were obtained that exhibited antireflective properties.


Sol gel synthesis of nanoparticles 1

Alkoxides are ideal chemical precursors for sol-gel synthesis because they react readily with water

Magnetism being one of the oldest scientific disciplines has been continuously studied since 6th century BC, which still offers scientific innovations today in realm of nanomagnetism. Iron oxide nanomaterials have been growing excessive importance because of their magnetic characteristics and wide applications. Iron oxides magnetic nanoparticles with appropriate surface chemistry are prepared either by wet chemical method such as colloid chemical or sol-gel methods or by dry processes such as vapour deposition techniques. This review summarizes comparative and brief study of the methods for the preparation of iron oxide magnetic nanoparticles with a control over the size, morphology and the magnetic properties. Applications of microwave irradiation for magnetic particle synthesis are also addressed.