Fluorescence quenching of conjugated polymer by coupling plasmonic silver nanocap array |
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| Institution: | 1. Department of Materials Science and Engineering, Institute of Space Technology, Islamabad 44000, Pakistan;2. Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan;3. Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan;4. Institute for Polymer Materials, POLYMAT, University of the Basque Country (UPV–EHU), Joxe Mari Korta Center, Avda. Tolosa 72, 20018 Donostia-San Sebastian, Spain;5. School of Chemical Engineering and SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea;1. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan;2. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;3. Department of Mathematics, COMSATS Institute of Information Technology, G.T. Road, Wah Cantt 47040, Pakistan |
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| Abstract: | The optical properties of poly(2,5-dioctyloxy-p-phenylene) (DOO-PPP) coupled to a silver nanocap array are investigated by Raman and photoluminescence spectra. The emission intensity of the DOO-PPP coupled to the silver nanocap array is much weaker than that of the DOO-PPP film due to the fluorescence quenching of the silver nanocap array. In contrast with the freshly prepared sample, the fluorescence quenching efficiency of the silver nanocap array is obviously decreased for the sample exposed in air; correspondingly, the Raman intensity at 1609 cm−1 is markedly decreased, which is characteristic Raman peak of the inter-ring C C stretching vibration in the conjugated polymer. The experimental results indicate that the inter-ring CC stretching vibration plays an important role for the fluorescence quenching in the DOO-PPP coupled to the silver nanocap array. |
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| Keywords: | Conjugated polymer Raman Fluorescence Surface plasmon resonance |
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