Journal
NANO LETTERS
Volume 13, Issue 5, Pages 1877-1882Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl304247n
Keywords
Silver nanoparticle; plasmon resonance; single DNA molecule; DNA labeling; video-rate imaging nanoparticle tracking
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Funding
- New Energy and Industrial Technology Development Organization (NEDO), Japan
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [20510111]
- Japan Society for the Promotion of Science (JSPS)
- Grants-in-Aid for Scientific Research [23560049, 20510111, 25790030, 25610111] Funding Source: KAKEN
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We find the spontaneous binding of single DNA molecules to uncoated silver nanoparticles (AgNPs) in aqueous solution with Mn2+ (3 mM). From dark-field optical microscopic imaging of AgNPs bound to DNA molecules, we demonstrate analysis of the Brownian motion of single DNA molecules via plasmon resonance elastic light scattering. Our results provide that the plasmonic imaging technique is free from photobleaching and blinking and thus is useful in long-time observations of single-molecule DNA dynamics.
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