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Fluorescence correlation spectroscopy near individual gold nanoparticle

Fluorescence correlation spectroscopy near individual gold nanoparticle,10.1016/j.cplett.2011.01.005,Chemical Physics Letters,Qingyan Wang,Guowei Lu,L

Fluorescence correlation spectroscopy near individual gold nanoparticle  
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Qingyan Wang, Guowei Lu, Lei Hou, Tianyue Zhang, Chunxiong Luo, Hong Yang, Grégory Barbillon, Franck H. Lei, Christophe A. Marquette, Pascal Perriat, Olivier Tillement, Stéphane Rouxhttp://academic.research.microsoft.com/io.ashx?type=5&id=49296348&selfId1=0&selfId2=0&maxNumber=12&query=
Dynamic behavior of fluorescent molecules near an individual gold nanoparticle is investigated experimentally by fluorescence correlation spectroscopy method. The gold particle that acts as an optical nano-antenna presents significant near-field volume reduction. The single molecule diffusion behavior is clearly observed within a reduced near-field volume due to a highly localized field enhancement. The near-field volume and fluorescence enhancement are polarization and concentration dependent and strongly depend on the properties of the gold nanoparticle. A simple approximated model is developed to fit the FCS autocorrelation curves. In principle, the single molecule analysis within the near-field volume of nanostructures could be applied to the analysis of biological membranes and intracellular processes.
Journal: Chemical Physics Letters - CHEM PHYS LETT , vol. 503, no. 4, pp. 256-261, 2011
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