The synthesis of colloidal solutions of non-noble metal nanoparticles
26 May 2007Colloidal solution has been the topic of intense research during the last decade and various methods have been designed to obtain suitable colloidal solutions of non-noble metal nanoparticles. These colloids can be suitable as building blocks for numerous applications. Lots of synthetic roots have been identified and investigated to develop colloids. Stable fluids of non-noble metallic nanoparticles can be synthesized through hydrophobic solvent route.
The stability of colloids in organic solvents has been examined by various scientists and a few argued the stability of the colloids on the basis of electrostatic forces between non-noble particles and their stabilizers are responsible for the physical nature of colloids. The other possible reason of producing stable non-noble metal nanoparticles is chemisorption, however a few other scientists als see the possibility of physisorption.
Scientists also have produced colloids by alternate methods by reduction of metallic salts in organic solvents. The compounds used for preparing colloids determine the shape as well as the stability of the final particles. A small change in preparation condition can give a different output and as it is a well known fact in colloidal chemistry that the crystal structures might be different from bulk material.
Catalysis requires low range nanoparticles having large surface to volume ratio and therefore colloidal particles finds their uses in catalysis. Practically different colloidal structures possess different properties and these structures and particular properties should be considered before selecting these colloids for a particular application.
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