DNA Multilayer Films on Planar and Colloidal Supports:  Sequential Assembly of Like-Charged Polyelectrolytes

DNA Multilayer Films on Planar and Colloidal Supports:  Sequential Assembly of Like-Charged Polyelectrolytes

Multilayer films comprising solely negatively charged polyelectrolytes were sequentially assembled based on DNA hybridization. Films prepared from alternating layers of two-block homopolymeric nucleotides (polyA20G20/polyT20C20) grew linearly with increasing layer number, as verified by quartz cryst...

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Veröffentlicht in:Nano letters 2005-05, Vol.5 (5), p.953-956
Hauptverfasser: Johnston, Angus P. R, Read, Elizabeth S, Caruso, Frank
Format: Artikel
Sprache:eng
Schlagworte:
Adsorption
Applied sciences
Coated Materials, Biocompatible - analysis
Coated Materials, Biocompatible - chemistry
Colloids - analysis
Colloids - chemistry
Condensed matter: structure, mechanical and thermal properties
Crystallization - methods
DNA - analysis
DNA - chemistry
DNA - ultrastructure
Electrolytes - chemistry
Electronics
Exact sciences and technology
Materials Testing
Membranes, Artificial
Microelectronic fabrication (materials and surfaces technology)
Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Nanotechnology - methods
Physics
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Silicon Dioxide - chemistry
Structure of solids and liquids
crystallography
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Zusammenfassung:Multilayer films comprising solely negatively charged polyelectrolytes were sequentially assembled based on DNA hybridization. Films prepared from alternating layers of two-block homopolymeric nucleotides (polyA20G20/polyT20C20) grew linearly with increasing layer number, as verified by quartz crystal microgravimetry, UV−vis spectrophotometry and optical microscopy. Urea treatment of the films induced morphological changes, while exposure to low ionic strength solutions resulted in film disassembly. DNA multilayer films were also formed on silica particles, and DNA hollow capsules were obtained following dissolution of the template core.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl050608b