Nano-Tweezer and Colours award
PRESIDENT’S COLOURS AWARD
What’s in news?
President of India, who is the Supreme Commander of Indian Armed Forces, Ram Nath Kovind presented the President’s Colours award to the Corps of Army Air Defence at the Gopalpur Military Station on completion of 25 years of the Army Air Defence College (AADC) at Gopalpur.
- The President’s Colours Award is the highest military honour for an armed forces organisation. This award is given in recognition of exceptional service rendered by to the nation, both during peace and hostile.
- The award was received by Army AD Centre on behalf of the Corps of Army Air Defence.
- The Air Defence has been in existence since 1940 as a part of Corps of Artillery however, as an independent arm, it got recognition in 1994.
- The Corps of Army Air Defence has been awarded with two Ashok Chakras, two Kirti Chakras, 20 Vir Chakras, nine Shauryas Chakras, 113 Sena Medals and 55 Mention-in-Despatches in addition to four Honour Titles awarded during 1971 Indo-Pak war.
What’s in news?
Researchers at the Centre for Nano Science and Engineering (CeNSE), IISc, have developed a ‘nano-tweezer’ to trap and move nano-sized particles.
- Optical tweezers have been known for about thirty years now and are used in biology to hold and manipulate particles; however, they have a limitation when it comes to nanosized particles.
- This was partly solved with the development of “plasmonic tweezer” which works on the principle that when a disc of noble metal, like gold, is illuminated with light, it creates an electromagnetic field around the disc.
- This field can attract and hold on to tiny particles. Plasmonic tweezers are limited by the fact that they are fixed in space and can therefore only trap objects that come close to them.
- This is a tool that can be used to pick and move small suspended particles even including cells.
- The method that uses only optical force.
- The team integrate a silver nanodisc with a microrod made of glass and the combination can be manipulated using laser beams alone.
- This “tweezer-in-a-tweezer” approach can trap objects of about 40 nanometres in size, using a single laser beam.
- This is the typical size of a virus or DNA.
- The optical tweezer holds the plasmonic tweezer and the plasmonic tweezers trap the target nanoparticles, therefore tweezer (plasmonic) in tweezer (optical).
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