The Molecular electronics is the fundamental building blocks of an emerging technology called ‘nanoelectronics a field that holds promise for application in all kinds of electronic devices, from cell phones to sensors. Molecular devices could be built a thousand times smaller than Si based devices in use now. Computer industry execs might start breathing easier because their biggest fear - that smaller and faster devices will eventually come to an end because silicon microchips will get so small that eventually they will contain too few silicon atoms to work - might be lessened as advancements in molecular electronics come to the rescue. Molecular electronics is enabling an area of nanoscience and technology that holds promise for the next generation of electronic devices.