Hi Joe, Your research is a little outside of my range of expertise. So, I gave your message to my finance. She has a PhD in Chemistry and runs a chromatography lab.
All she had to say was "Wow! He's got access to some nice equipment.". I think she's jealous. I may be way off but, your description reminds me of black anodize. Anyway, it looks promising. Good luck. -Redler Joe Street wrote: > 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/
