tag:blogger.com,1999:blog-13869903.post2686621263677403996..comments2024-03-28T04:15:44.459-05:00Comments on nanoscale views: Random tidbitsDouglas Natelsonhttp://www.blogger.com/profile/13340091255404229559noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-13869903.post-1875034183039263962009-06-16T13:01:55.079-05:002009-06-16T13:01:55.079-05:00i just read and enjoyed your article in Physics Wo...i just read and enjoyed your article in Physics World.<br /><br />(it took a while for our library to get it...)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13869903.post-59855073362739638332009-05-30T12:05:54.568-05:002009-05-30T12:05:54.568-05:00RE redox diblock: Good reference. The boojum woul...RE redox diblock: Good reference. The boojum would be an ambient temperature superconducting diode. Resistance is futile!<br /><br />Given a living polymer, concatenate a redox ladder for a one-molecule particle accelerator (I know, but adequate for <I>New Scientist</I>). A centrally branched triblock is a one-molecule transistor.<br /><br />Start with stuff (science) then progress to engineering (things). Engineers can optimize anything. Crap to start is optimized crap at end (e.g., OLEDs that do everything but survive use).Uncle Alhttp://www.mazepath.com/uncleal/noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-50865093453023819532009-05-29T11:02:36.424-05:002009-05-29T11:02:36.424-05:00Al, the idea of using a redox diblock as a diode g...Al, the idea of using a redox diblock as a diode goes back to Aviram and Ratner in 1974 (Chem. Phys. Lett. 1974, 29, 277).Douglas Natelsonhttps://www.blogger.com/profile/13340091255404229559noreply@blogger.comtag:blogger.com,1999:blog-13869903.post-84788051292282543702009-05-29T10:28:42.937-05:002009-05-29T10:28:42.937-05:00http://www.mazepath.com/uncleal/pave1.png
I got ye...http://www.mazepath.com/uncleal/pave1.png<br />I got yer single molecule conductor right here<br /><br />Hydrogens and pi-bonds are invisible. Give each <I>mer</I> alkyl, PEO, or PPO chains for (liquid crystal) solubility. W.A. Little, Phys. Rev. 134 A1416-A1424 (1964); n- or p-dope the polyacetylene. Counter-wound pi-stacked helices avoid BCS frustration in a non-centrosymmetric lattice.<br /><br />Arene aldehyde to the benzil, methylenate (Current Organic Synthesis 2(2) 231 (2005), e.g., Tebbe), then Grubbs or Schrock ADMET living polymerization with ethylene extrusion. Diode from a redox diblock. Terminate with sulfur to self-assemble onto gold electrodes.Uncle Alhttp://www.mazepath.com/uncleal/noreply@blogger.com