title: Wurtzite-type ZnS nanoparticles by pulsed electric discharge.
abstract: The synthesis of wurtzite-type ZnS nanoparticles by an electric discharge submerged in molten sulfur is reported. Using a pulsed plasma between two zinc electrodes of diameter 5 mm in molten sulfur, we have synthesized high-temperature phase (wurtzite-type) ZnS nanocrystals with an average size of about 20 nm. The refined lattice parameters of the synthesized wurtzite-type ZnS nanoparticles were found to be larger than those of the reported ZnS (JCPDS card no 36-1450). Synthesis of ZnMgS (solid solution of ZnS and MgS) was achieved by using ZnMg alloys as both cathode and anode electrodes. UV-visible absorption spectroscopy analysis showed that the absorption peak of the as-prepared ZnS sample (319 nm) displays a blue-shift compared to the bulk ZnS (335 nm). Photoluminescence spectra of the samples revealed peaks at 340, 397, 423, 455 and 471 nm, which were related to excitonic emission and stoichiometric defects.
authors.affiliation: Priority Organization for Innovation and Excellence, Kumamoto University, Kurokami, Kumamoto, Japan. emil@kumamoto-u.ac.jp
authors.forename: Emil
authors.initials: E
authors.lastname: Omurzak
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Mashimo
authors.forename: Saadat
authors.initials: S
authors.lastname: Sulaimankulova
authors.forename: Shintaro
authors.initials: S
authors.lastname: Takebe
authors.forename: Liliang
authors.initials: L
authors.lastname: Chen
authors.forename: Zhypargul
authors.initials: Z
authors.lastname: Abdullaeva
authors.forename: Chihiro
authors.initials: C
authors.lastname: Iwamoto
authors.forename: Yudai
authors.initials: Y
authors.lastname: Oishi
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Ihara
authors.forename: Hiroki
authors.initials: H
authors.lastname: Okudera
authors.forename: Akira
authors.initials: A
authors.lastname: Yoshiasa