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Indian Institute of Technology (IIT) Roorkee 
Synthesis of seed mediated bimetallic nanocomposites by metal based redox reaction 
Kalyan Kumar Sadhu and Shahbaz Ahmad Lone  
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2017-07-10 
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Indian Institute of Technology (IIT) Roorkee 
Gold nanoparticle as seed can develop the different size nanoparticles by the reduction of chlroauric acid via hydroquinone based reduction method. This synthetic route was modified for the fine tuning in the seeded growth of the nanoparticles.Gold based metal alloys have been synthesized with heating the reaction mixture by heating on or above 150 °C. Seed mediated syntheses of the gold nanoparticles with different sizes are also known in literature. We targeted to develop an alternative synthetic route of mixed metal nanomaterials at room temperature. In our approach, we have introduced gold nanoparticle as seed to prepare gold-metal oxide nanocomposites with variable ratio of metals content. We have developed a new synthetic methodology for gold-metal oxide nanomaterials at room temperature. We have found three different conditions to vary the composition of mixed metal contents in the nanocomposites. This synthetic methodology was applied to develop the mixed metal magnetic nanocomposites with gold and iron. The gold-iron oxide based materials show exchange bias at low temperature. This exchange bias property might be useful for the memory device.  

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