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Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids

Paper ID Volume ID Publish Year Pages File Format Full-Text
29092 44118 2008 6 PDF Available
Title
Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids
Abstract

The modulation of photoluminescence of conducting polymers using Au colloids was studied for poly(3-hexyl thiophene) (P3HT) and poly(2-methoxy-5-(2-ethyl)(hexyloxy) 1,4-phenylenevinylene) (MEHPPV). The extent of modulation can be explained by the extinction of Au colloids and quantum yield of polymer solution. Two types of Au colloids were investigated: nanocluster (∼100 nm) and nanoparticles (∼5 nm). The addition of the Au nanocluster into either one of the polymer solutions (0.08 wt.%) increases the photoluminescence (PL) of each polymer due to the scattering effect from the Au surface plasmon resonance. In contrast, the addition of Au nanoparticle which surface plasmon resonance comes from the absorption component causes a PL quenching. We have observed the PL intensity remains unchanged for P3HT but decreases for MEHPPV. The low quantum yield characteristic of P3HT has stronger polymer interactions than that of MEHPPV, this reduces energy transfer to Au nanoparticles, then dissipates further into heat with no decrease in PL. The polymer interactions are minimized using a dilute polymer solution (1.48 × 10−5 wt.% for MEHPPV and P3HT respectively). In this case, the nonradiative decay rate of Au colloids becomes dominant, the decrease of PL is observed for both polymers. The photoluminescence of conducting polymer can be modulated by controlling the interactions among polymers and Au colloids.

Keywords
Surface plasmon; Conducting polymer; Resonance; Colloid; Photoluminescence
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Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 199, Issues 2–3, 25 September 2008, Pages 291–296
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us