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Browsing Articole din publicaţii internaţionale by Author "CHAI, G."

Browsing Articole din publicaţii internaţionale by Author "CHAI, G."

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  • Biopolymer-assisted self-assembly of ZnO nanoarchitectures from nanorods 
    LUPAN, O.; CHOW, L.; CHAI, G.; SCHULTE, A.; PARK, S.; LOPATIUK-TIRPAK, O.; CHERNYAK, L.; HEINRICH, H. (ELSEVIER, 2008)
    We have investigated three-dimensional (3-D) architectures–microspheres and radial structures–based on biopolymer-assisted self-assembly from one-dimensional ZnO nanorods. The developed method is simple, rapid and ...
  • Comparative study of the ZnO and Zn1−xCdxO nanorod emitters hydrothermally synthesized and electrodeposited on p-GaN 
    LUPAN, O.; PAUPORTÉ, T.; CHOW, L.; CHAI, G.; VIANA, B.; URSAKI, V. V.; MONAICO, E.; TIGINYANU, I. M. (ELSEVIER, 2012)
    Hydrothermal synthesis and electrodeposition are low-temperature and cost-effective growth techniques of high quality nanostructured active materials for opto-electronic devices. Here we report a hydrothermal seed layer-free ...
  • Effect of synthesis conditions on the growth of ZnO nanorods via hydrothermal method 
    POLSONGKRAM, D.; CHAMNINOK, P.; PUKIRD, S.; CHOW, L.; LUPAN, O.; CHAI, G.; KHALLAF, H.; PARK, S.; SCHULTE, A. (ELSEVIER, 2008)
    ZnO nanorods with hexagonal structures were synthesized by a hydrothermal method under different conditions. The effect of synthesis conditions on ZnO nanorod growth was systematically studied by scanning electron microscopy. ...
  • Electric Field Assisted-Assembly of Perpendicular Oriented ZnO Nanorods on Si Substrate 
    LUPAN, O.; CHOW, L.; CHAI, G.; PARK, S.; SCHULTE, A. (NSTI, 2008)
    In this work, we report a new electric-field assisted assembly technique used to vertically-align ZnO nanorods on the Si substrate during their growth. In the assembly process, the forces that induce the alignment are a ...
  • Fabrication and characterization of Zn–ZnO core–shell microspheres from nanorods 
    LUPAN, O.; CHOW, L.; CHAI, G.; HEINRICH, H. (ELSEVIER, 2008)
    We present a new method to synthesize ZnO nanorods on zinc spheres to form a core–shell structure. Selective self-assembly growth of a shell with ZnO nanorods on a metallic Zn microsphere core has been accomplished via ...
  • Growth of tetragonal SnO2 microcubes and their characterization 
    LUPAN, O.; CHOW, L.; CHAI, G.; HEINRICH, H.; PARK, S.; SCHULTE, A. (ELSEVIER, 2008)
    Single-crystalline SnO2 microcubes were grown using the hydrothermal method without any catalyst. X-ray diffraction (XRD) patterns and energy dispersive X-ray (EDX) analysis verified that the cubes are tin dioxide SnO2. ...
  • Highly sensitive and selective hydrogen single-nanowire nanosensor 
    LUPAN, O.; CHOW, L.; PAUPORTE, Th.; ONO, L. K.; ROLDAN CUENYA, B.; CHAI, G. (ELSEVIER, 2012)
    Metal oxides such as ZnO have been used as hydrogen sensors for a number of years. Through doping, the gas response of zinc oxide to hydrogen has been improved. Cadmium-doped ZnO nanowires (NWs) with high aspect ratio have ...
  • Investigation of tin oxide nanobelts/nanoribbons prepared by chemical deposition technology 
    LUPAN, O.; CHOW, L.; CHAI, G.; SCHULTE, A.; PARK, S.; HEINRICH, H.; SONTEA, V.; TROFIM, V.; RAILEAN, S. (Institute of Electrical and Electronics Engineerings, IEEE, 2008)
    A facile aqueous solution process to fabricate tin oxide nanoarchitectures was successfully developed. The influence of precursors on the morphology of SnO2 is studied. Tin oxide nanobelts/nanoribbons were characterized ...
  • Microsensor on single ZnO microwire 
    CHAI, G.; RUSU, E.; CHOW, L.; STRATAN, G. I.; HEINRICH, H.; PARK, S.; SCHULTE, A.; LUPAN, O.; TROFIM, V.; RAILEAN, S. (Institute of Electrical and Electronics Engineerings, IEEE, 2009)
    For development of individual ZnO microwire in hydrogen sensors an environmentally benign synthesis process and fabrication route are required. Here we report a synthesis route for ZnO microwires using vapour phase process. ...
  • Nanofibrous zinc oxide films synthesized by magnetron sputtering 
    GHIMPU, L.; LUPAN, O.; POPESCU, S.; URSAKI, V.; TIGINYANU, I.; CHOW, L.; CHAI, G.; PARK, S.; SCHULTE, A. (IEEE, 2011)
    ZnO nanofibrous-based materials required for sensors and dye-solar cells have been grown on tin oxide/glass substrates by magnetron sputtering. Synthesis regimes have been identified that give nanoporous and nanofibrous ...
  • Photoluminescence and Raman Study of Well-Aligned ZnO Nanorods on p-Si Substrate 
    URSAKI, V. V.; LUPAN, O.; TIGINYANU, I. M.; CHAI, G.; CHOW, L. (American Scientific Publishers, 2011)
    We report on optical properties of ZnO nanorods grown on p-type Si substrates by an electric-field assisted assembly technique in aqueous solutions applied at relative low temperature (96°C). The results of micro-Raman ...
  • A rapid hydrothermal synthesis of rutile SnO2 nanowires 
    LUPAN, O.; CHOW, L.; CHAI, G.; SCHULTE, A.; PARK, S.; HEINRICH, H. (ELSEVIER, 2009)
    Tin oxide (SnO2) nanowires with rutile structure have been synthesized by a facile hydrothermal method at 98°C. The morphologies and structural properties of the as-grown nanowires/nanoneedles were characterized by scanning ...
  • Selective hydrogen gas nanosensor using individual ZnO nanowire with fast response at room temperature 
    LUPAN, O.; URSAKI, V. V.; CHAI, G.; CHOW, L.; EMELCHENKO, G. A.; TIGINYANU, I. M.; GRUZINTSEV, A. N.; REDKIN, A. N. (ELSEVIER, 2010)
    In this work, we report on a single ZnO nanowire-based nanoscale sensor fabricated using focused ion beam (FIB/SEM) instrument. We studied the diameter dependence of the gas response and selectivity of ZnO nanowires (NWs) ...
  • Selective Multiterminal Sensor on Individual ZnO Nanotetrapod 
    LUPAN, O.; CHAI, G.; CHOW, L.; TROFIM, V. (NSTI, 2009)
    This article presents a sensitive and selective sensor based on an individual zinc oxide nanotetrapod and on crossed ZnO nanorod for detection of UV light and hydrogen at low temperature. It is demonstrated that ZnO tetrapod ...
  • Self-assembly of densely packed and aligned bilayer ZnO nanorod arrays 
    CHOW, L.; LUPAN, O.; HEINRICH, H.; CHAI, G. (American Institute of Physics, 2009)
    We present a method of self-assembly of densely packed and aligned bilayer ZnO nanorod arrays in a hydrothermal synthesis process. The alkali hydrothermal environment first induced the growth of hydrotalcitelike zincowoodwardite ...
  • Synthesis and characterization of Cu-doped ZnO one-dimensional structures for miniaturized sensor applications with faster response 
    CHOW, L.; LUPAN, O.; CHAI, G.; KHALLAF, H.; ONO, K.; ROLDAN CUENYA, B.; TIGINYANU, I. M.; URSAKI, V. V.; SONTEA, V.; SCHULTE, A. (ELSEVIER, 2013)
    Detection of chemicals and biological species is an important issue to human health and safety. In this paper, we report the hydrothermal synthesis at 95°C of Cu-doped ZnO low-dimensional rods for room-temperature (RT) ...
  • Synthesis and characterization of ZnO nanowires for nanosensor applications 
    LUPAN, O.; EMELCHENKO, G. A.; URSAKI, V. V.; CHAI, G.; REDKIN, A. N.; GRUZINTSEV, A. N.; TIGINYANU, I. M.; CHOW, L.; ONO, L. K.; ROLDAN CUENYA, B.; HEINRICH, H.; YAKIMOV, E. E. (ELSEVIER, 2010)
    In this paper we report the synthesis of ZnO nanowires via chemical vapor deposition (CVD) at 650°C. It will be shown that these nanowires are suitable for sensing applications. ZnO nanowires were grown with diameters ...
  • Synthesis of one-dimensional SnO2 nanorods via a hydrothermal technique 
    LUPAN, O.; CHOW, L.; CHAI, G.; HEINRICH, H.; PARK, S.; SCHULTE, A. (ELSEVIER, 2009)
    We have developed a simple solution process to synthesize tin oxide nanorods. The influence of precursors and the reaction temperature on the morphology of SnO2 is investigated. SnO2 nanorods are characterized by X-ray ...
  • Ultraviolet photoconductive sensor based on single ZnO nanowire 
    LUPAN, O.; CHAI, G.; CHOW, L.; EMELCHENKO, G. A.; HEINRICH, H.; URSAKI, V. V.; GRUZINTSEV, A. N.; TIGINYANU, I. M.; REDKIN, A. N. (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2010)
    ZnO nanowires were synthesized by the CVD procedure and have been investigated by SEM, TEM, SAED, Raman, and cw PL spectroscopy. The fabrication of an ultraviolet (UV) photoconductive detector based on single ZnO nanowire ...

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