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Browsing Articole din publicaţii internaţionale by Author "CHAI, Guangyu"

Browsing Articole din publicaţii internaţionale by Author "CHAI, Guangyu"

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  • Characterization of gallium-doped CdS thin films grown by chemical bath deposition 
    KHALLAF, Hani; CHAI, Guangyu; LUPAN, Oleg; CHOW, Lee; PARK, S.; SCHULTE, Alfons (ELSEVIER, 2009)
    Ga-doped CdS thin films, with different [Ga]/[Cd] ratios, were grown using chemical bath deposition. The effect of Ga-doping on optical properties and bandgap of CdS films is investigated. Resistivity, carrier density, and ...
  • Crossed zinc oxide nanorods for ultraviolet radiation detection 
    CHAI, Guangyu; LUPAN, Oleg; CHOW, Lee; HEINRICH, Helge (ELSEVIER, 2009)
    An ultraviolet photosensor has been successfully constructed by the in situ lift-out method in a focused ion beam system. The prototype consists of individual naturally self-assembled crossed ZnO nanorods grown by an aqueous ...
  • Fabrication of ZnO nanorod-based hydrogen gas nanosensor 
    LUPAN, Oleg; CHAI, Guangyu; CHOW, Lee (ELSEVIER, 2007)
    We report a first work on nanofabrication of hydrogen nanosensor from single ZnO branched nanorods (tripod) using in-situ lift-out technique and performed in the chamber of focused ion beam (FIB) system. Self-assembled ZnO ...
  • FIB fabrication of ZnO nanotetrapod and cross-sensor 
    CHOW, Lee; LUPAN, Oleg; CHAI, Guangyu (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2010)
    This article presents the fabrication of zinc oxide (ZnO) nanotetrapod and cross-nanorods-based sensors. This low-dimensional device is made in a focused ion beam set-up by using nanodeposition for metal electrodes. The ...
  • Focused-ion-beam fabrication of ZnO nanorod-based UV photodetector using the in-situ lift-out technique 
    LUPAN, Oleg; CHOW, Lee; CHAI, Guangyu; CHERNYAK, Leonid; LOPATIUK-TIRPAK, Olena; HEINRICH, Helge (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2008)
    Abstract ZnO nanorods and nanowires are promising candidates as new types of high-sensitivity ultraviolet (UV) photodetectors due to their wide bandgap and large aspect ratio. In this study, single-crystalline ZnO nanorods ...
  • In-situ boron doping of chemical-bath deposited CdS thin films 
    KHALLAF, Hani; CHAI, Guangyu; LUPAN, Oleg; CHOW, Lee; HEINRICH, Helge; PARK, S.; SCHULTE, Alfons (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2009)
    In-situ boron doping of CdS using chemical-bath deposition (CBD) is reported. The effect of B doping on optical properties, as well as electrical properties, crystal structure, chemistry, and morphology of CdS films is ...
  • Nanofabrication and characterization of ZnO nanorod arrays and branched microrods by aqueous solution route and rapid thermal processing 
    LUPAN, Oleg; CHOW, Lee; CHAI, Guangyu; ROLDAN, Beatriz; NAITABDI, Ahmed; SCHULTE, Alfons; HEINRICH, Helge (ELSEVIER, 2007)
    This paper presents an inexpensive and fast fabrication method for one-dimensional (1D) ZnO nanorod arrays and branched two-dimensional (2D), three-dimensional (3D) – nanoarchitectures. Our synthesis technique includes the ...
  • Novel hydrogen gas sensor based on single ZnO nanorod 
    LUPAN, Oleg; CHAI, Guangyu; CHOW, Lee (ELSEVIER, 2008)
    For extensive use in an industrialized process of individual ZnO nano/microrods as building nanoblock in novel hydrogen sensors, a simple, inexpensive, and bio-safe synthesis process and nanofabrication route is required. ...
  • A single ZnO tetrapod-based sensor 
    LUPAN, Oleg; CHOW, Lee; CHAI, Guangyu (ELSEVIER, 2009)
    Transferable ZnO tetrapods were grown by an aqueous solution method. An individual ZnO tetrapod-based sensor was fabricated by in situ lift-out technique and its ultraviolet (UV) and gas sensing properties were investigated. ...
  • Synthesis and Characterization of Ag- or Sb-Doped ZnO Nanorods by a Facile Hydrothermal Route 
    LUPAN, Oleg; CHOW, Lee; ONO, Luis K.; CUENYA, Beatriz Roldan; CHAI, Guangyu; KHALLAF, Hani; PARK, Sanghoon; SCHULTE, Alfons (American Chemical Society, 2010)
    ZnO nanorods doped with Ag and Sb have been synthesized by a facile hydrothermal technique. Crystal quality, morphology, chemical/electronic composition, local structure, and vibrational mode properties are investigated ...

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