Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Novel Fabrication of CdS Hollow Spheres Induced by Self-assembled Process

  • Choi, Kyoung-Hoon (Photon Applied Functional Molecule Research Laboratory, Department of Chemistry, Yonsei University) ;
  • Chae, Weon-Sik (Korea Basic Science Institute, Gangneung Center) ;
  • Jung, Jin-Seung (Department of Chemistry, Kangnung National University) ;
  • Kim, Yong-Rok (Photon Applied Functional Molecule Research Laboratory, Department of Chemistry, Yonsei University)
  • Published : 2009.05.20
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Abstract

Micro-size CdS spheres of hollow shape were fabricated through the self-assembly of high density arrow-like nanorods. The synthesis of the CdS hollow spheres were accomplished in an aqueous solution of cadmium nitrate and triblock copolymer (Pluronic P123) at low temperature (80 ${^{\circ}C}$) through the slow release of S2- ions from thioacetamide. Morphology of the fabricated CdS hollow spheres was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The results indicate that the arrow-like CdS nanorods are simultaneously grown and attached each other to form the building units that become the spheres with hollow inside as a self-assembled process. The CdS spheres have a diameter of $2{\sim}3 {\mu}m$ and consist of the nanorods with a length of$\sim$800 nm. The nanocrystal building blocks have a hexagonal CdS structure.

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