Colloidal silver is nanoparticles. Marshall
Ken & Nancy Bagwell 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
