## I think we ARE making them?? ..Just not in a way that's patentable. ode
At 10:54 AM 11/8/2005 -0800, you wrote: > >Was there any discussion on how these nanoparticles >were produced? I suppose it's not something the >average person could make? > >-Ken Bagwell > > >--- Marshall Dudley <[email protected]> wrote: > >> Ode Coyote wrote: >> >> > "Scientists studied the absorption spectra of the >> different preparations >> > to pinpoint their shapes. "Spherical nanoparticles >> absorbed in the blue >> > region of the spectrum, for example," Yacaman >> said." >> > >> > ## So, "color" isn't 'entirely' about size, but >> is something much more >> > complex especially when shapes of impure crystals >> can vary in a fractal >> > pattern according to the nucleating particle >> center that the crystal grows >> > upon. >> >> Yes, this is known, and covered in some of the >> references I have posted in the >> past. Basically a silver particle is like a small >> antenna, and will have a >> resonant frequency. Light at the resonant frequency >> will be absorbed, and as >> the particle increases in size, then the resonant >> frequency decreases (resonant >> frequency will be 4 times the length of time it >> takes for electricity to travel >> from one margin of the crystal to another, just like >> with a 1/4 wavelength >> antenna), moving the absorption band from uv, to >> violet, blue, green, yellow, >> orange, red, and infrared as the crystal grows >> larger. The apparent color is >> of course the complement of the absorbed color. >> >> Now if you make an antenna in the shape of a >> snowflake, you will have a myriad >> of resonances, some low frequency across the whole >> flake, but others within the >> center, arms and areas at the end of the arms, each >> having their own >> resonances, and these will all be much higher >> resonances than the one across >> the whole thing. Exactly the same thing happens with >> silver crystals, except >> the frequencies are not in the radio range, but the >> light ranges. The physics >> is actually quite well understood, although >> computing all the resonances for an >> irregular shape becomes difficult if not impossible. >> >> Marshall >> >> >> >> -- >> The Silver List is a moderated forum for discussing >> Colloidal Silver. >> >> Instructions for unsubscribing are posted at: >> http://silverlist.org >> >> To post, address your message to: >> [email protected] >> Silver List archive: >> http://escribe.com/health/thesilverlist/index.html >> >> Address Off-Topic messages to: >> [email protected] >> OT Archive: >> >http://escribe.com/health/silverofftopiclist/index.html >> >> List maintainer: Mike Devour <[email protected]> >> >> > > > > > >__________________________________ >Yahoo! Mail - PC Magazine Editors' Choice 2005 >http://mail.yahoo.com > > > >-- >No virus found in this incoming message. >Checked by AVG Free Edition. >Version: 7.1.362 / Virus Database: 267.12.8/162 - Release Date: 11/5/2005 > > > > >-- >No virus found in this incoming message. >Checked by AVG Anti-Virus. >Version: 7.1.362 / Virus Database: 267.12.8 - Release Date: 11/5/2005 > > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.1.362 / Virus Database: 267.12.8 - Release Date: 11/5/2005
