Macromolecular Research

  • 제16권2호
  • /
  • Pages.103-107
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  • 2008
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  • 1598-5032(pISSN)
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  • 2092-7673(eISSN)
한국고분자학회 (The Polymer Society of Korea)
권호 표지

Synthesis of a Triblock Copolymer Containing a Diacetylene Group and Its Use for Preparation of Carbon Nanodots

  • Kim, Beom-Jin (Department of Materials Science and Engineering, and Hyperstructured Organic Materials Research Center, Seoul National University) ;
  • Oh, Dong-Kung (Department of Materials Science and Engineering, and Hyperstructured Organic Materials Research Center, Seoul National University) ;
  • Chang, Ji-Young (Department of Materials Science and Engineering, and Hyperstructured Organic Materials Research Center, Seoul National University)
  • 발행 : 2008.02.29
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초록

Carbon nanodots were prepared by the pyrolysis of a triblock copolymer. The triblock copolymer, poly(methyl methacrylate)-b-polystyrene-b-poly(methyl methacrylate) was synthesized by atom transfer radical polymerization using an initiator containing a diacetylene group. A polymer thin film on a mica substrate was prepared by spin-casting at 2,000 rpm from a 0.5 wt% toluene solution of the triblock copolymer. After drying, the cast film was vacuum-annealed for 48 h at $160^{\circ}C$. The annealed film formed a spherical morphology of polystyrene domains with a diameter of approximately 30 nm. The film was exposed to UV irradiation to induce a cross-linking reaction between diacetylene groups. In the subsequent pyrolysis at $800^{\circ}C$, the cross-linked polystyrene spheres were carbonized and the poly(methyl methacrylate) matrix was eliminated, resulting in carbon nanodots deposited on a substrate with a diameter of approximately 5 mn.

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