Synthesis, structure and magnetic properties of SiO2-coated Fe nanocapsules

Computational Cogitation of Cn@Al12 Clusters

“…[3] For example, composite semiconductor particles were found to be more efficient than their corresponding uniform particles. [17][18][19] Fast forward to the present day and one can find an evergrowing body of literature detailing the design and application of a vast array of hybrid nanoclusters in fields as diverse as biomedicine, [20][21][22][23][24][25][26][27] catalysis [28][29][30][31][32][33][34][35][36][37] and electronics. [38][39][40][41][42] Of most relevance to the results presented herein are the studies of core-shell systems comprising small cores ( 5 atoms) and relatively small shells ( 20 atoms), [2,10,[43][44][45][46][47][48][49][50][51][52] particularly those detailing the behaviour of doped Al 12 .…”

Synthesis, magnetic and electrical properties of Fe-containing SiO2 nanocomposite

“…However, Fe particles in nano form have a high affinity for oxygen. Despite the reduction of their total magnetic moment, when dispersed in non-magnetic matrix or coating, several studies have been conducted to encapsulate these particles in silica [1,3], alumina [4], yittria [5,6], gold [7], carbon [8], boron nitride [9], and Fe 3 O 4 [10,11] in order to improve their stability, electrical and magnetic properties. Fe-silica nanocomposites are of particular interest because they have higher resistivity and this combined with the good magnetic properties of metallic Fe, makes them a good candidate for dielectric applications and could possibly be a good replacement material for ferrites.…”

The effect of iron phosphate, alumina and silica coatings on the morphology of carbonyl iron particles

“…Boehmite nanoparticles are prepared from alumina sol that consists of aluminum tri-sec-butoxide Al(OC 4 H 9 ) 3 , water and nitric acid HNO 3 . The formation of colloidal boehmite by the hydrolysis of Al(OC 4 H 9 ) 3 can be described as follows: [12] Al(OC 4 H 9 ) 3 …”

“…The dehydration-dehydroxylation processes can be expressed by the following equation: [12] AlOOH.nH 2 O 300 -450…”

“…Alumina-and silica-coated Fe particles with core/shell structure were prepared by the sol-gel method. [12] Coated Fe powders consist of spherical particles and coupled duo particles, and each particle has a clear core-shell structure. [18] The shells are relatively uniform, and their thickness is 100-500 nm.…”