Pompa, P. P. and Martiradonna, L and Della Torre, A and Della Sala, F and Manna, L and De Vittorio, M and Calabi, F and Cingolani, R and Rinaldi, R (2006) Metal-enhanced fluorescence of colloidal nanocrystals with nanoscale control. NATURE NANOTECHNOLOGY, 1 (2). pp. 126-130.
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Official URL: http://www.nature.com/nnano/journal/v1/n2/abs/nnan...
Engineering the spectral properties of fluorophores, such as the enhancement of luminescence intensity, can be achieved through coupling with surface plasmons in metallic nanostructures(1-11). This process, referred to as metal-enhanced fluorescence, offers promise for a range of applications, including LEDs, sensor technology, microarrays and single-molecule studies. It becomes even more appealing when applied to colloidal semiconductor nanocrystals, which exhibit size-dependent optical properties, have high photochemical stability, and are characterized by broad excitation spectra and narrow emission bands(12). Other approaches have relied upon the coupling of fluorophores ( typically organic dyes) to random distributions of metallic nanoparticles or nanoscale roughness in metallic films(1-4,6,8). Here, we develop a new strategy based on the highly reproducible fabrication of ordered arrays of gold nanostructures coupled to CdSe/ZnS nanocrystals dispersed in a polymer blend. We demonstrate the possibility of obtaining precise control and a high spatial selectivity of the fluorescence enhancement process.
|Subjects:||Material Science > Nanochemistry|
|Deposited By:||Anuj Seth|
|Deposited On:||06 Jan 2009 16:45|
|Last Modified:||08 May 2009 10:28|
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