Esa: Here's a different 'laymans' article: http://www.nanowerk.com/news/newsid=20812.php Here's the article abstract on the Science website: http://www.sciencemag.org/content/331/6019/894 "In electron-transfer processes, spin effects normally are seen either in magnetic materials or in systems containing heavy atoms that facilitate spin-orbit coupling. We report spin-selective transmission of electrons through self-assembled monolayers of double-stranded DNA on gold. By directly measuring the spin of the transmitted electrons with a Mott polarimeter, we found spin polarizations exceeding 60% at room temperature. The spin-polarized photoelectrons were observed even when the photoelectrons were generated with unpolarized light. The observed spin selectivity at room temperature was extremely high as compared with other known spin filters. The spin filtration efficiency depended on the length of the DNA in the monolayer and its organization."
-Mark _____ From: Esa Ruoho [mailto:esaru...@gmail.com] Sent: Thursday, April 14, 2011 4:35 AM To: vortex-l@eskimo.com Subject: Re: [Vo]: DNA can detect spin states... Spintronics-website is broken, so is there an actual url for this? (Preferably newsreporting article) On Thu, Apr 14, 2011 at 4:05 AM, Mark Iverson <zeropo...@charter.net> wrote: FYI: "Professor Ron Naaman from the Weizmann Institute in Israel and scientists in Germany discovered that biological molecules in DNA can detect spin states in atoms. The researchers fabricated self-assembling, single layers of DNA attached to a gold substrate. The DNA was exposed to electrons - and the DNA molecules reacted strongly with electrons at one spin, and hardly at all with electrons with a different spin." -Mark
