RIGID DNA CHAINS NEAR NANOPARTICLES
SCIE
SCOPUS
- Title
- RIGID DNA CHAINS NEAR NANOPARTICLES
- Authors
- Jeon, S; Granick, S
- Date Issued
- 2004-05-04
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- Two-photon excitation time-resolved fluorescence anisotropy and lifetime measurements were used to study the conformation of DNA near oppositely charged nanoparticles. Negatively-charged rhodamine-labeled DNA was allowed to adsorb onto positively-charged nanoparticles in deionized water and surface-induced fluorescence quenching was observed by measuring the fluorescence lifetime. Fluorescence quenching decreased with the addition of NaCl to the DNA-nanoparticle complex, which implies that the separation of DNA from the nanoparticles increased. However, comparison of fluorescence lifetime decays between free labeled-DNA and the DNA-nanoparticle complex shows that the adsorbed DNA remained less flexible than free labeled-DNA. (C) 2004 Elsevier B.V. All rights reserved.
- Keywords
- DNA; nanoparticle; fluorescence lifetime; PARTICLES; POLYELECTROLYTES; COMPLEXES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28994
- DOI
- 10.1016/J.COLSURFA.2
- ISSN
- 0927-7757
- Article Type
- Article
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, vol. 238, no. 1-3, page. 109 - 112, 2004-05-04
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