An improved N,N-dimethylformamide and polyvinyl pyrrolidone approach for the synthesis of long silver nanowires

We present a solution chemistry route for the synthesis of silver nanowires and nanoplates done by a facile aqueous solution process using DMF as reducing agent in the presence of PVP without the addition of seed particles. The products were characterized by UV–vis and transmission electron microscopy (TEM). Experimental results indicated that as the reaction is left to stand at room temperature more silver nanowires are developed in solution. However, when the solution is refluxed, it gives rise to stable silver nanoplates. The prepared nanostructures displayed very strong absorption bands at room temperature.