The following information is from "Light-Scattering Submircorsopic particles as
Highly Fluorescent Analogs and Their Use as Tracer labels in Clinical and
Biuological Applications" by Juan Yguerabide and Evangelina E. Yguerabide, 
Depart
of biology, University of California at San Diego, La Jolla, California 92093.
Analytical Biochemnistry 262, pages 157-176 (1998)..  Articles number AB982760.

Silver Sols (colloidal silver):

Diameter    Transmission    Scattered Light    Absorb. wave max (nm)    
Scattered
wave max
38                   Yellow            Blue violet
431                                    465
47                   Yellow            Blue
440                                    472
60                   Yellow            Light Blue
449                                    474
75                    Gold              Green Blue            465
90                    Pink               Yellow
488                                    572
118                  Pink               Yellow
527                                    575
144                  Brown            Pale Yellow
575                                    590

This will be followed by 3 emails.

1. Silver spectral absortion for silver sols, unnormalized
2. Silver spectral absorption for silver sols, smaller particles normalized.
3. Gold spectral absorption for gold sols, normalized.

Marshall


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