Document Detail


Synergistic effects of SPR and FRET on the photoluminescence of ZnO nanorod heterostructures.
MedLine Citation:
PMID:  21946036     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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).
Authors:
Jee-Young Chang; Tae Geun Kim; Yun-Mo Sung
Related Documents :
21828636 - Origin of tunneling lineshape trends for kondo states of co adatoms on coinage metal su...
22026876 - Anomalous decay of electronically stabilized lead mesas on ni(111).
21776716 - Intrinsic ferromagnetism in nanocrystalline mn-doped zno depending on mn concentration.
1134716 - A surgical stereo-video microscope.
18754606 - Parameters for excess electron transfer in dna. estimation using unoccupied kohn-sham o...
15751346 - Femtosecond time-resolved geometry relaxation and ultrafast intramolecular energy redis...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-9-26
Journal Detail:
Title:  Nanotechnology     Volume:  22     ISSN:  1361-6528     ISO Abbreviation:  -     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-9-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  425708     Citation Subset:  -    
Affiliation:
Department of Materials Science and Engineering, Korea University, Seoul 136-713, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Understanding glaucomatous damage: Anatomical and functional data from ocular hypertensive rodent re...
Next Document:  Diagnostic Value of Leukopenia in Young Febrile Infants.