Free-Standing Nanocomposite Multilayers with Various Length Scales, Adjustable Internal Structures, and Functionalities

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We introduce an innovative and robust method for the preparation of nanocomposite multilayers, which allows accurate control over the placement of functional groups as well as the composition and dimensions of individual layers/internal structure. By employing the photocross-linkable polystyrene (PS-N-3, M-n = 28.0 kg/mol) with 10 wt % azide groups (-N-3) for host polymer and/or the PS-N-3-SH (M-n = 6.5 kg/mol) with azide and thiol (-SH) groups for capping ligands of inorganic nanoparticles, nanocomposite multilayers were prepared by an efficient photocross-linking layer-by-layer process, without perturbing underlying layers and nanostructures. The thickness of individual layers could be controlled from a few to hundreds of nanometers producing highly ordered internal structure, and the resulting nanocomposite multilayers, consisting of polymer and inorganic nanoparticles (CdSe@ZnS, Au, and Pt), exhibit a variety of interesting physical properties. These include prolonged photoluminescent durability, facile color tuning, and the ability to prepare functional free-standing films that can have the one-dimensional photonic band gap and furthermore be patterned by photolithography. This robust and tailored method opens a new route for the design of functional film devices based on nanocomposite multilayers.
Publisher
AMER CHEMICAL SOC
Issue Date
2009-02
Language
English
Article Type
Article
Keywords

QUANTUM DOTS; PHASE-TRANSFER; FILMS; NANOPARTICLES; NANOCRYSTALS; FABRICATION; CHEMISTRY; LAYERS; SIZE

Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.131, no.7, pp.2579 - 2587

ISSN
0002-7863
DOI
10.1021/ja8064478
URI
http://hdl.handle.net/10203/96966
Appears in Collection
CBE-Journal Papers(저널논문)
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