Hi Mike; I don't have any references I can recommend but I'll tell you what I did. I dry etched silicon using flourine ions in a reactive ion etcher. Making use of native polymer contamination of the surface and carefully controling the presence of oxygen radicals I was able to form a dense structure of columns roughly 100 nm wide and 400 nm tall that when viewed with an electron microscope look something like a forest. The nanoconvolution of the surface on a scale less than the wavelength of visible light results in an extremely antireflective black surface similar to a moth's eye. (BTW this is why moths see so well in the dark) The silicon material absorbs all the incoming radiation in the visible and longer wavelengths and even most of the ultaviolet I'd guess as low as 198 nm although I haven't tested it. Silicon is roughly similar to iron in its heat conducting properties so this film would be very good for a passive solar system. I think I could build a machine to sputter silicon on pipes and etch it in situ if I had the resources.
Joe Mike Redler wrote: > Hi everyone, > > I know of some descent resources for electronic circuits, software > development, and a bunch of other stuff. However, I've come up with > nuthin' for black bodies which contains both a practical guide for > passive solar collection and the analytical/mathematical tools for > theoretical modeling. Once I have that, I'm good to go, already having > one pretty good general text on heat transfer (J.P. Holman, seventh ed.). > > Joe, I know you mentioned some work you did with thin films (if my > memory serves me right). > > Can anyone point to a good on-line source? I'd even be happy with a > textbook recommendation. > > -Redler > > _______________________________________________ > Biofuel mailing list > Biofuel@sustainablelists.org > http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): > http://www.mail-archive.com/biofuel@sustainablelists.org/ > > _______________________________________________ Biofuel mailing list Biofuel@sustainablelists.org http://sustainablelists.org/mailman/listinfo/biofuel_sustainablelists.org Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Search the combined Biofuel and Biofuels-biz list archives (50,000 messages): http://www.mail-archive.com/biofuel@sustainablelists.org/
