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

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Lee, Seryun; Lee, Bokyoung; Kim, Bumjoon J.; Park, Junwoo; Yoo, Misang; Bae, Wan Ki; Char, Kookheon; Hawker, Craig J.; Bang, Joona; Cho, Jinhan
Issue Date
American Chemical Society
J. Am. Chem. Soc. 2009, 131, 2579
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-N3,
Mn ) 28.0 kg/mol) with 10 wt % azide groups (-N3) for host polymer and/or the PS-N3-SH (Mn ) 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.
0002-7863 (print)
1520-5126 (online)
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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