Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 50, Pages 21048-21053Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp907415q
Keywords
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Funding
- Nanomat-ASP [2000-2006]
- NIS
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Spherical hybrid cyanine-silica nanoparticles, quite homogeneous in size (ca 50 rim) were prepared by the reverse microemulsion Method. Solvatochromism tests indicated that all fluorophore molecules were actually entrapped within the inorganic matrix. The combination of steady-state and time-resolved fluorescence measurements allowed LIS to Conclude that almost all cyanine molecules exhibited the same photophysical behavior and this Suggested they should be dispersed in a monomeric form. Such behavior resulted in a significant brightness enhancement per Cubic nanometer of nanoparticle with respect to molecules ill Solution. The Occurrence of the optical interparticle effect by progressively decreasing the distance among hybrid nanoparticles passing from Suspension to a dry powder was also investigated.
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