Scientists have developed a new method to create an effective single-molecule diode.
A group of researchers from Columbia University provided an asymmetry environment to molecular junction. They placed an ionic solution around the active molecules. Afterwards, they utilized the gold metal electrodes to contact the molecule. These electrodes were in different and shapes. Surprisingly, the team observed a rectification ratio of nearly 250. The proportion is relatively 50 times faster as compared to ordinary diode.
For the first time, the concept of single molecule diode was proposed in 1970s. Arieh Aviram along with Mark Ratner speculated that a molecule could work as rectifier as well. Additionally, it can easily carry one way current.
Latha Venkataraman, associate professor of applied physics at Columbia Engineering, discusses the method. He states that scientists used to dream about a single active molecule. It became an obsession of electronic engineers
Earlier, molecular diodes were used an as asymmetrical structure. It conducted one-way electric current with an on and off switch option.
Furthermore, the team claims that it is pretty easy to copy the discovery. It can be used and applied in nanoscale devices such as carbon nanotube and graphene.