The nanowires are basically nothing but tiny wires. Mainly used in nano technologies, these are usually incorporated with gold, silver and other metals. These are highly used in electronic devices and have brought a new dimension to them. With a different range of dimension, they are high in demand.

As the nanowires are used so much in so many devices, the question is how to choose the nanowires when buying online. As various companies offer various nanowires, it is hard to choose and compare between them without knowing a parameter.
 

Magnetic property: as the nanowires consist of magnetic properties, you should check that the nanowires do not lose its magnetic properties during the process of magnetization.

Catalytic Property: as the nano particles are created from metal oxides, they do have better catalytic properties. Try to choose the nanowires incorporated with gold or silver as it will show better catalytic property than the rest.

Diameter: try to choose the nanowires of diameter according to the needs. The diameter of these nanowires varies so it should be checked before you plan to buy nanowires online.
 

One important aspect is to check the length of the nanowires. The nanowires are generally 30-60 nanometres in length. So you should see that the length of the wire you buy do not go out of this range. You should also take care of the top up and bottom down approach before you intend to buy nanowires online.
 
The top up approach implies dissolving large sized metals into minute pieces and the bottom down approach implies a place where the combination of atom takes place. All these points are very important before buying the nanowires online as they should be in perfect length for perfect use.