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e-news Oct 07 - NIST

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nanotubes can potentially store a relatively large amount of chargeTo make carbon nanotube supercapacitors flexible, nanotubes were grown on top of a silicon substrateusing standard chemical vapour-deposition.Then a mixture of plant cellulose and chloride was dissolved and was spread among the nanotubes.After peeling this off the silicon substrate the thing left was a piece of paper a few tens of micrometersthick, with carbon nanotubes sticking out from one side.To create the supercapacitor, two sheets of this paper were stuck back-to-back, nanotube side out,with aluminium foil coating both sides as current collectors. When a current was applied, the paperstored the charge, with the carbon nanotubes serving as electrodes and the cellulose as an insulator.The researchers then used a similar method to create a flexible battery. They used a piece of papercontaining carbon nanotubes as a cathode and evaporated a layer of lithium onto the other side toserve as an anode. Once again they sandwiched it between sheets of aluminium foil, which served ascurrent collectors.Finally, by layering supercapacitors and lithium-ion batteries, they created a hybrid device in whichthe batteries could be used to charge the supercapacitors.Courtesy: www.<strong>news</strong>cientisttech.comWatch this space for more in the next issue.(Please mail your suggestions and feedback at srkbehera@yahoomail.com orghosh_ankan@rediffmail.com)birthday bash (16 NOV. –15DEC.)<strong>NIST</strong> e_<strong>news</strong> wishes a very Happy Birthday to:Ms. Suman Acharya17-NovMs. Sonali Prava Dash 18-NovMr. Atul Kumar Gupta 19- NovMs. Sumtra Ojha25-NovMr. Jagannath Mohanty 26-NovMr. Bhabani Shankar Pattanaik 5-DecMany Many Happy Returns of the Day!!!marriage anniversary<strong>NIST</strong> e_<strong>news</strong> wishes a very Happy JoyfulMarriage Anniversary to:Mr. Bhaskar BandopadhyayMr. Abhro MukherjeeMr. Arabinda PandaDr. Arun K. PadhyMr. Jagannath MohantyMr. M. SureshMr. M. Rajendra KumarMr. Shom P DasDr. M.Reza23-Nov25-Nov28-Nov8-Dec8-Dec9-Dec12-Dec14-Dec19-DecNational Institute of Science & Technology, Berhampur, 761008 15 of 18

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