In this paper we present and review the effective route for synthesize the oxides and hydroxides  of nano-particles, -colloid, -rod, -tube from Y, Eu, Tb, Gd and Ti, Fe. The hydroxides and oxides of the above elements have been synthesized by using a polymer as soft template or derived from sol gel process via complexion.

The nanoparticles of Y₂O₃, Eu₂O₃, Tb₄O₇ and Gd₂O₃ have been prepared by using diethylene glycol. Nanoparticles of TiO₂ derived from sol gel process via complexion. The nanocolloid of Fe₃O₄ obtained by co precipitation of Fe(II) and Fe(III) in starch or methylpolyethylenglycol.

The (Y,Tb) hydroxides nanorod, and tube have been prepared by using polyethylene glycol with the different molecular weights. The (Y,Tb) oxides nanotubes and rodes can be obtained by calcination of the hydroxides at 800⁰C. TiO₂ nanorod and tubes have been obtained from complexion synthesis with tri(propylene glycol)diacrylate by using the sol gel process.

The methods of XRD, FESEM, TEM, EDS, and thermogravimetry have been employed to characterize these nanomaterials. The growth mechanism of  the above nanostructures could be curiously affected by a solution-solid process, anisotropic nanocrystal structures and incorporated with complexion agent or polymer conformation. Especially the transformation from nanorod to tube in reaction process has been observed well in the case of Y(OH)₃ and TiO₂.

The BET surface area data for Y(OH)₃ nanotube,  139,26 m²/g, for TiO₂ nanotube, 244,69 m²/g are much larger than that of nanoparticle or -rod, indicating that their hollow and tubular characteristics.

The magnetization and colloidal properties of (Fe,Gd) nanosuspensions were characterized to biocompatible materials for contrast enhancements in medical MRI.

The optical, spectroscopic, and  emission  of some nanophores: Y(OH)₃: Eu, Tb ; Y₂O₃: Eu, Tb; Eu₂O₃; Tb₄O₇  as particles, colloid, rod and tube have been investigated for display, waveguide devices and active materials in coding card.

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