Yes, it would seem that gold coloured silver sols start at particle sizes of about 60 - 75nm (0.060 - 0.075 micron), but the data given does not tell us at what point the yellow colour first appears other than <38nm (<0.038 micron).
If I remember correctly this data seems to be at odds with the results obtained by Frank Key? Ivan. > -----Original Message----- > From: Marshall Dudley [mailto:[email protected]] > Sent: Saturday, 31 August 2002 2:18 a.m. > To: [email protected] > Subject: Re: CS>Light-Scattering > > > I have looked for years for the information in table 3! It > seems all our > estimates of particles size for yellow and gold sols has > been on the low > side by a factor of 2 to 4. The yellow particles are way > over the size > often given as the range of acceptable sizes which goes up to 15 nm. > > This article is definitely a keeper. > > Thanks for finding it. > > Marshall > > Ivan Anderson wrote: > > > An in depth investigation of light scattering, absorption and > > transmission, in gold and silver sols. Has some colour > photographs of > > silver sols. > > Warning: scientific and technical...just ignore the math, perhaps > > start at page 13. > > > > http://www.geniconsciences.com/root/files/1293.pdf > > > > Ivan -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
