| Synergistic effects of SPR and FRET on the photoluminescence of ZnO nanorod heterostructures. | |
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MedLine Citation:
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PMID: 21946036 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Solution-grown ZnO nanorods (NRs) were successfully conjugated with CdSe/ZnS quantum dots (QDs) and Ag nanoparticles (NPs) to suppress intrinsic defect emission and to enhance band-edge emission at the same time. First, high-density and high-crystallinity ZnO NRs of diameter 80-90 nm and length 1.2-1.5 µm were grown on glass substrates using a low-temperature seed-assisted solution method. The as-synthesized ZnO NRs showed sharp photoluminescence (PL) band-edge emission centered at ∼ 377 nm together with broad defect emission in the range of ∼ 450-800 nm. The ZnO NRs were decorated with CdSe/ZnS QDs and Ag NPs, respectively, by sequential drop-coating. The PL of CdSe/ZnS [Formula: see text] NR conjugates showed that ZnO band-edge emission decreased by 73.8% due to fluorescence resonance energy transfer (FRET) and charge separation between ZnO and CdSe/ZnS by type II energy band structure formation. On the other hand, Ag [Formula: see text] NR conjugates showed increased band-edge emission (by 25.8%) and suppressed defect emission compared to bare ZnO NRs. A possible energy transfer mechanism to explain the improved PL properties of ZnO NRs was proposed based upon the combined effects of FRET and surface plasmon resonance (SPR). |
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Authors:
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Jee-Young Chang; Tae Geun Kim; Yun-Mo Sung |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-26 |
Journal Detail:
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Title: Nanotechnology Volume: 22 ISSN: 1361-6528 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101241272 Medline TA: Nanotechnology Country: - |
Other Details:
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Languages: ENG Pagination: 425708 Citation Subset: - |
Affiliation:
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Department of Materials Science and Engineering, Korea University, Seoul 136-713, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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