Now showing items 1-18 of 18

    • Characteristics of output voltage and current of integrated nanogenerators 

      Yang, Rusen; Qin, Yong; Li, Cheng; Dai, Liming; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2009-01-15)
      Owing to the anisotropic property and small output signals of the piezoelectric nanogenerators (NGs) and the influence of the measurement system and environment, identification of the true signal generated by the NG is ...
    • Combined polarized Raman and atomic force microscopy: In situ study of point defects and mechanical properties in individual ZnO nanobelts 

      Lucas, Marcel; Wang, Z. L. (Zhong Lin); Riedo, Elisa (Georgia Institute of TechnologyAmerican Institute of Physics, 2009-08-04)
      We present a method, polarized Raman (PR) spectroscopy combined with atomic force microscopy (AFM), to characterize in situ and nondestructively the structure and the physical properties of individual nanostructures. ...
    • Controlled synthesis and manipulation of ZnO nanorings and nanobows 

      Hughes, William L.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2005-01-19)
      An experimental procedure is presented for the controlled synthesis and manipulation of ZnO nanorings and nanobows at high purity and large yield. Atomic force microscopy manipulation of the nanostructures demonstrates ...
    • Depth resolved luminescence from oriented ZnO nanowires 

      Rosenberg, R. A.; Haija, M. Abu; Vijayalakshmi, K.; Zhou, Jun; Xu, Sheng; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2009-12-14)
      We have utilized the limited penetration depth of x-rays to study the near-surface properties of vertically aligned ZnO nanowires. For an energy of 600 eV the penetration depth varies between 3 and 132 nm as the incidence ...
    • Dual-mode mechanical resonance of individual ZnO nanobelts 

      Bai, X. D.; Gao, Puxian; Wang, Z. L. (Zhong Lin); Wang, E. G. (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-06-30)
      The mechanical resonance of a single ZnO nanobelt, induced by an alternative electric field, was studied by in situ transmission electron microscopy. Due to the rectangular cross section of the nanobelt, two fundamental ...
    • Effects of piezoelectric potential on the transport characteristics of metal-ZnO nanowire-metal field effect transistor 

      Gao, Zhiyuan; Zhou, Jun; Gu, Yudong; Fei, Peng; Hao, Yue; Bao, Gang; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2009-06-05)
      We have investigated the effects of piezoelectric potential in a ZnO nanowire on the transport characteristics of the nanowire based field effect transistor through numerical calculations and experimental observations. ...
    • Erratum: Effects of piezoelectric potential on the transport characteristics of metal-ZnO nanowire-metal field effect transistor 

      Gao, Zhiyuan; Zhou, Jun; Gu, Yudong; Fei, Peng; Hao, Yue; Bao, Gang; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2009-08-03)
    • Interface and defect structures of Zn–ZnO core–shell heteronanobelts 

      Ding, Yong; Kong, X. Y.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-01-01)
      Interface and defect structures of Zn–ZnO core–shell nanobelts have been investigated using high-resolution transmission electron microscopy. Most of the nanobelts can be classified into two types from their growth directions: ...
    • Manganese-doped ZnO nanobelts for spintronics 

      Ronning, C.; Gao, Puxian; Ding, Yong; Wang, Z. L. (Zhong Lin); Schwen, D. (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-02-02)
      Zinc oxide (ZnO) nanobelts synthesized by thermal evaporation have been ion implanted with 30 keV Mn+ ions. Both transmission electron microscopy and photoluminescence investigations show highly defective material directly ...
    • Nanoarchitectures of semiconducting and piezoelectric zinc oxide 

      Gao, Puxian; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2005-01-21)
      Semiconducting and piezoelectric zinc oxide has two important structure characteristics: the multiple and switchable growth directions: 010, 20, and 0001; and the {0001} polar surfaces. The fast growth directions create ...
    • Nanobelts as nanocantilevers 

      Hughes, William L.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-04-28)
      Semiconducting oxide nanobelts of ZnO have been sectioned and manipulated, for microelectromechanical systems, using an atomic force microscopy probe. Structurally modified nanobelts demonstrate potential for nanocantilever ...
    • Nanopropeller arrays of zinc oxide 

      Gao, Puxian; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-04-12)
      Polar surface dominated ZnO nanopropeller arrays were synthesized by a two-step high temperature solid-vapor deposition process. The axis of the nanopropellers is a straight nanowire along the c axis and enclosed by {20} ...
    • Nanoscale mechanical behavior of individual semiconducting nanobelts 

      Mao, Scott X.; Zhao, Minhua; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-08-04)
      Nanobelts are a group of materials that have a rectangle-like cross section with typical widths of several hundred nanometers, width-to-thickness ratios of 5–10, and lengths of hundreds of micrometers. In this letter, ...
    • Polar-surface dominated ZnO nanobelts and the electrostatic energy induced nanohelixes, nanosprings, and nanospirals 

      Kong, Xiang Yang; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-02-09)
      We report the controlled synthesis of free-standing ZnO nanobelts whose surfaces are dominated by the large polar surfaces. The nanobelts grow along the a axis, their large top/bottom surfaces are the ±(0001) polar planes, ...
    • Self-attraction among aligned Au/ZnO nanorods under electron beam 

      Wang, Xudong; Summers, Christopher J.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2004-12-28)
      Self-attraction among vertical aligned Au/ZnO nanorods under the illumination of an electron beam has been observed. This phenomenon is attributed to the interaction between the accumulation charges near the metal-semiconductor ...
    • Synthesis and characterization of Zn₁₋ₓMnₓO nanowires 

      Zhang, Xiaomei; Zhang, Yue; Wang, Z. L. (Zhong Lin); Mai, Wenjie; Gu, Yudong; Chu, Wangsheng; Wu, Ziyu (Georgia Institute of TechnologyAmerican Institute of Physics, 2008-04-21)
      Mn doped ZnO nanowires (NWs) were fabricated by a one-step vapor-solid process at 500°C. The doped Mn exists in the wurtzite lattice as substitutional atom without forming secondary phases. X-ray absorption near-edge ...
    • Toward high output-power nanogenerator 

      Liu, Jin; Fei, Peng; Zhou, Jun; Tummala, Rao R.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2008-04-29)
      In this paper, the factors that determine the power output of a piezoelectric nanowire (NW) nanogenerator (NG) have been analyzed. The output current is the sum of those contributed by all of the NWs while the output voltage ...
    • Tracking the catalyzed growth process of nanowires by in situ x-ray diffraction 

      Kirkham, Melanie; Wang, Z. L. (Zhong Lin); Snyder, Robert L. (Georgia Institute of TechnologyAmerican Institute of Physics, 2010-07-06)
      Quasi-one-dimensional nanostructures of silicon, oxides, and other materials show great promise for a variety of applications. These nanostructures are commonly grown using metal catalyst nanoparticles. This paper investigates ...