Latha Venkataraman, an NRI scientist creates first single molecule device
Latha Venkataraman, an NRI scientist from the United States, has created a single molecule device that can be used for nano-scale devices. It has been claimed that it can perform 50 times better than all the designs that have been created so far.
The idea for it was suggested way back in 1974, by Mark Ratner and Arieh Aviram. They had theorised that a molecule could act as a one-way conductor of electric current. Since the electronic devices are becoming too small, it was important to create a device in which only a single molecule could carry the current. It is the edge of miniaturisation, Venkataraman notes.
It was created by surrounding the active molecule with an ionic solution which gold electrodes use to make a contact with the molecule. The rectification ratio was as high as 250, almost 50 times higher than what has been created till date. The current that this single active molecule carries is more than 0.1 microamperes which, Venkataraman says, is a lot of current to carry by a single molecule.
It can be applied to all nano-scale devices.