Silver nanowires have distinct optical, electrical, and thermal properties and are being incorporated into a wide range of products from photovoltaics to biological sensors.
They are incredibly efficient at absorbing and scattering light. Nanowires are characterized by analytical techniques such as scanning electron microscopy, transmission electron microscopy, and atomic force microscopy.
When silver nanowires are in solution, molecules interact with the nanowire surface to form a double layer of charge which prevents aggregation and stabilizes the nanowires.
Manufacturing of Silver Nanowires
Synthesis of silver nanowires can be carried out using a number of chemical methods. Some of them are listed below:
- Polyol method – Silver nanowires are produced using an aqueous solvent in an autoclave at 120° C for 8h.
- Rapid synthesis – Silver nanowires are prepared by mixing polyvinyl pyrrolidone and copper chloride in disposable glass vials. In this method, ethylene glycol is used as a precursor to the reducing agent.
- Template method – This method employs supramolecular nanotubes of amphiphilic cyanine dye in aqueous solution as chemically active templates for the formation of silver nanowires.
- Electroless deposition –Silver nanowires are formed by the electroless deposition of silver into the polycarbonate membranes through metal amplification process.