Authors: Kim, Ki-Se; Yoo, Seong Il; Lee, Taek Seung; Sohn, Byeong-Hyeok

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 10, October 2010 , pp. 6896-6900(5)

Publisher: American Scientific Publishers

Abstract:

We report controlled light emissions from spin-assisted layer-by-layer (LbL) thin films containing a donor-acceptor pair of fluorescent dyes. Based on their spectral overlap, we selected rhodamine 123 (R123) and rhodamine B (RB) as the donor and acceptor, respectively. For the construction of multilayered thin films, a complex of each dye and poly(sodium 4-sulfonate) (PSS-R123 and PSS-RB) was prepared and then alternately spin coated with poly(allyamine hydrochloride) (PAH). LbL assemblies were fabricated with a sequence of [PAH/PSS-RB]/〈[PAH/PSS]〉_n/[PAH/PSS-R123]. Since the distance between R123 and RB was precisely adjusted by the number of bilayers (n) of [PAH/PSS] between them, we were able to tune the light emission from the thin film by controlling the efficiency of the energy transfer.

Keywords: FLUORESCENCE RESONANCE ENERGY TRANSFER; FLUOROPHORE; POLYELECTROLYTE; LAYER-BY-LAYER ASSEMBLY

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.2964

Publication date: 2010-10-01

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