Structure of Solidified Colloidal Array Laser Filters Studied by Cryogenic Transmission Electron Microscopy
1994; American Association for the Advancement of Science; Volume: 263; Issue: 5144 Linguagem: Inglês
10.1126/science.263.5144.207
ISSN1095-9203
AutoresE. Kamenetzky, Lino G. Magliocco, Hans P. Panzer,
Tópico(s)Electrowetting and Microfluidic Technologies
ResumoOrdered arrays of charged uniform colloidal polystyrene particles in solution form a single-wavelength laser filter that is transparent to other wavelengths. A usable filter was prepared by solidification within an acrylamide-methylene-bisacrylamide gel. The rejection wavelength of the colloidal array filter changes with gel composition. Cryogenic transmission electron microscopy of two gel formulations shows that the colloidal array filter is composed of AAA stacking of close-packed planes. Excellent agreement is found between the layer spacings measured and those predicted from the rejection wavelengths.
Referência(s)