Distance and molecular weight dependence of surface enhanced fluorescence in conjugated polymer thin films

Michael S. Griffo; Sue A. Carter

doi:10.1117/12.795772

26 August 2008 Distance and molecular weight dependence of surface enhanced fluorescence in conjugated polymer thin films

Michael S. Griffo, Sue A. Carter

Author Affiliations +

Proceedings Volume 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI; 70320U (2008) https://doi.org/10.1117/12.795772
Event: NanoScience + Engineering, 2008, San Diego, California, United States

Abstract

Photoluminescence (PL) of poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene] (MEH-PPV) in the presence of Silver nanoparticles (NP) is studied. The purpose of this research is to understand the PL distance dependence of plasmon-polymer separation and a correlation between the surface enhanced fluorescence (SEF) and polymer molecular weight. Distinct peaks in PL are found for plasmon-polymer separations ranging from near the far field to the near field, under 100 nm. Extinction of the devices shows that changes in absorption cannot explain all enhancement in PL and suggests that a modification of the radiative lifetime is modified. The dependence of the photoluminescence of MEH-PPV on molecular weight shows variation but overall suggests chain length does not affect film quenching. This is largely attributed to the large polydispersity of the polymer materials used.

Citation Download Citation

Michael S. Griffo and Sue A. Carter "Distance and molecular weight dependence of surface enhanced fluorescence in conjugated polymer thin films", Proc. SPIE 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI, 70320U (26 August 2008); https://doi.org/10.1117/12.795772

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