Document Detail


Synthesis of silica protected photoluminescence QDs and their applications for transparent fluorescent films with enhanced photochemical stability.
MedLine Citation:
PMID:  23032107     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In this paper, we have demonstrated a novel and simple way to prepare transparent composite fluorescent films by using poly (acrylic acid) co-polymer as a matrix and silica coated photoluminescence (PL) quantum dots (QDs) as light-emitting materials. The strategies include preparing aqueous amphiphilic oligomer (polymaleic acid n-hexadecanol ester, PMAH) modified QDs, encapsulating the aqueous QDs in silica with a modified Stöber method and fabricating the QD-PMAH-SiO(2)-polymer composite fluorescent films with a spin-coating method. The obtained light-emitting thin films were transparent under room light and showed bright red, green and deep-blue light under the irradiation of UV light. The PL intensity of the composite films increased incrementally with the number of layers and the concentration of QD-PMAH-SiO(2) within each film. A white light emitting film was also fabricated by combining the silica coated red, green and deep-blue QDs in a proper ratio. Moreover, the photochemical stability of the QD-PMAH-SiO(2) in composite film was enhanced significantly compared with PMAH coated QDs, because of a thicker and compact passivating silica layer formed on the surfaces of the PL QDs.
Authors:
Changhua Zhou; Huaibin Shen; Hongzhe Wang; Weiwei Xu; Mao Mao; Sujuan Wang; Lin Song Li
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-02
Journal Detail:
Title:  Nanotechnology     Volume:  23     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  425601     Citation Subset:  -    
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