Abstract
We investigated the enhancement and quenching of dye fluorescence by single gold nanoparticles using an aperture-type scanning near-field optical microscope to evaluate the shape dependence. Enhancement or reduction of fluorescence was found to be strongly dependent on the shape of the particle. Gold nanoplates showed significant fluorescence enhancement, as did aggregated nanoparticles for the most part. On the other hand, gold nanorods with high aspect ratios showed quenching effects. The results suggest that the electromagnetic near-field in the vicinity of the surface of nanoparticles, not just near the apex or the tip but the whole surface, is important for understanding fluorescence enhancement and quenching.
| Original language | English |
|---|---|
| Pages (from-to) | 105-109 |
| Number of pages | 5 |
| Journal | Chemical Physics Letters |
| Volume | 467 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2008 Dec 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Physics and Astronomy(all)
Cite this
Dye fluorescence enhancement and quenching by gold nanoparticles : Direct near-field microscopic observation of shape dependence. / Horimoto, Noriko Nishizawa; Imura, Kohei; Okamoto, Hiromi.
In: Chemical Physics Letters, Vol. 467, No. 1-3, 15.12.2008, p. 105-109.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dye fluorescence enhancement and quenching by gold nanoparticles
T2 - Direct near-field microscopic observation of shape dependence
AU - Horimoto, Noriko Nishizawa
AU - Imura, Kohei
AU - Okamoto, Hiromi
PY - 2008/12/15
Y1 - 2008/12/15
N2 - We investigated the enhancement and quenching of dye fluorescence by single gold nanoparticles using an aperture-type scanning near-field optical microscope to evaluate the shape dependence. Enhancement or reduction of fluorescence was found to be strongly dependent on the shape of the particle. Gold nanoplates showed significant fluorescence enhancement, as did aggregated nanoparticles for the most part. On the other hand, gold nanorods with high aspect ratios showed quenching effects. The results suggest that the electromagnetic near-field in the vicinity of the surface of nanoparticles, not just near the apex or the tip but the whole surface, is important for understanding fluorescence enhancement and quenching.
AB - We investigated the enhancement and quenching of dye fluorescence by single gold nanoparticles using an aperture-type scanning near-field optical microscope to evaluate the shape dependence. Enhancement or reduction of fluorescence was found to be strongly dependent on the shape of the particle. Gold nanoplates showed significant fluorescence enhancement, as did aggregated nanoparticles for the most part. On the other hand, gold nanorods with high aspect ratios showed quenching effects. The results suggest that the electromagnetic near-field in the vicinity of the surface of nanoparticles, not just near the apex or the tip but the whole surface, is important for understanding fluorescence enhancement and quenching.
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UR - http://www.scopus.com/inward/citedby.url?scp=57049094355&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2008.10.067
DO - 10.1016/j.cplett.2008.10.067
M3 - Article
AN - SCOPUS:57049094355
VL - 467
SP - 105
EP - 109
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -