Fluorescence Enhancement of Ruthenium Complex on Silver Using Different Chain Length Carboxylic Acid Terminated Thiols: Distance and Metal Concentration Study

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Abstract:

The fluorescence enhancement of ruthenium complex (Ru(bpy)2+3) was studied on silver surface deposited by simple Tollens mirror reaction. The plasmon effects on spacer distance, silver concentration, and deposition methods were examined. Silver nanoparticles prepared were coated with different chain length carboxylic acid-terminated thiols as spacers. This leads to development of distance between Ag and Ru dye being varied from 4 to 23 Å. Effect of different silver deposition methods on the emission spectra was also studied using metal evaporator deposition method. The results show that Ag concentration, Ag film roughness, and specific distance between metal and dye should be tuned for a maximum increase in fluorescence.

Keywords: FLUORESCENCE; SAM; SILVER; SPACER; SURFACE PLASMON; THIOL

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2008.IC02

Publication date: September 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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