Science & Technology, Defense, Environment
- Devices that can operate one million times faster than modern electronics (Free Available)
- Solar-powered purifier developed by researchers (Free Available)
- Anticancer agent promotes regeneration of damaged heart muscle (Free Available)
- Decades old radioactive glass used to examine the Moon’s formation theory (Free Available)
- Comet hunters have a chance to spot comet 45P (Free Available)
- First indigenously built AEW&C, Netra, inducted in IAF (Free Available)
- ISRO to create history with launch (Free Available)
- 1.1 million people die prematurely each year due to air pollution in India (Free Available)
- UAE looks to transport people to the Red Planet (Only for Online Coaching Members)
- Google a step closer to rolling out a network of balloons to provide Internet (Only for Online Coaching Members)
- First DNA computer capable of detecting several antibodies in the blood (Only for Online Coaching Members)
- Scientists have 3D-printed small, soft bio-bots with living tissues (Only for Online Coaching Members)
- Scientists have discovered why the crystallised iron core of the Earth remains solid (Only for Online Coaching Members)
- The risk of running out of rare earth metals led to deep sea mining (Only for Online Coaching Members)
- Scientists have spotted seven Earth-sized planets (Only for Online Coaching Members)
- African black rhinoceros face risk of extincti on (Only for Online Coaching Members)
Devices that can operate one million times faster than modern electronics
- A researcher from India has taken the first definitive step to produce high-speed electronic devices that can operate one million times faster than modern electronics.
- The electrons were found to be moving at a speed (frequency) close to 1,015 (one million billion) hertz; the best achievable speed in modern transistors is only 109 (one billion) hertz. The results were published in Nature .
- Conventionally, the motion of electrons (conductivity) is achieved by applying voltage. But Dr. Garg and others controlled the motion of electrons inside the solid material by using laser pulses.
- Light waves are electromagnetic in nature and have very high oscillation frequency of electric and magnetic fields. This ultra-high frequency of light waves can be used to drive and control electron motion in semiconductors.
- The performance of high-speed circuits rely on how quickly electric current can be turned on and off inside a material.
- The very short time interval needed to turn silicon dioxide from an insulator to a conductor was possible as the team used high-intensity and extremely short laser pulses and silicon dioxide in the form of a nanofilm. In the bulk form.
- Silicon dioxide tends to get damaged by high-intensity laser as the material tends to accumulate heat produced by the laser pulse.
- But as a nanofilm, silicon dioxide becomes nearly transparent to laser and absorbs less heat and therefore gets less damaged.