Now showing items 36-55 of 105

    • In Situ High-Resolution Transmission Electron Microscopy in the Study of Nanomaterials 

      Howe, James M.; Mori, Hirotaro; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyMaterials Research Society, 2008-02)
      This article introduces the use of in situ high-resolution transmission electron microscopy (HRTEM) techniques for the study and development of nanomaterials and their properties. Specifically, it shows how in situ HRTEM ...
    • In situ imaging of field emission from individual carbon nanotubes and their structural damage 

      Wang, Z. L. (Zhong Lin); Gao, Rui Ping; De Heer, W. A.; Poncharal, P. (Georgia Institute of TechnologyAmerican Institute of Physics, 2002-02-04)
      Field emission of individual carbon nanotubes was observed by in situ transmission electron microscopy. A fluctuation in emission current was due to a variation in distance between the nanotube tip and the counter ...
    • In vitro Biomimetic Construction of Hydroxyapatite–Porcine Acellular Dermal Matrix Composite Scaffold for MC3T3-E1 Preosteoblast Culture 

      Zhao, Hongshi; Wang, Guancong; Hu, Shunpeng; Cui, Jingjie; Ren, Na; Liu, Duo; Liu, Hong; Cao, Chengbo; Wang, Jiyang; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyMary Ann Liebert, Inc., 2011-02-26)
      The application of porous hydroxyapatite–collagen (HAp-Collagen) as a bone tissue engineering scaffold is hindered by two main problems: its high cost and low initial strength. As a native 3-dimenssional collagen framework, ...
    • In-situ observations of high temperature surface processes on α-alumina bulk crystals 

      Wang, Z. L. (Zhong Lin); Bentley, James (Georgia Institute of TechnologyMaterials Research Society, 1991)
      Reflection electron microscopy (REM) was applied to image in-situ the dynamic changes of atomic-height steps on the surfaces of a-alumina bulk crystals heated to high temperatures. Atomic diffusion, desorption and adsorption ...
    • Incoherence effects in reflection electron microscopy 

      Howie, Archie; Lanzerotti, Mary Y.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyEDP Sciences, 1992-04)
      The phase contrast imaging of surface steps in reflection electron microscopy is analysed. It is shown that the typical images are seriously affected by incoherence effects and that this arises, not from the strong inelastic ...
    • Induced Growth of Asymmetric Nanocantilever Arrays on Polar Surfaces 

      Wang, Z. L. (Zhong Lin); Kong, X. Y.; Zuo, J. M. (Georgia Institute of TechnologyAmerican Physical Society, 2003-10-30)
      We report that the Zn-terminated ZnO (0001) polar surface is chemically active and the oxygenterminated (0001) polar surface is inert in the growth of nanocantilever arrays. Longer and wider "comblike" nanocantilever arrays ...
    • Integration of metal oxide nanobelts with microsystems for nerve agent detection 

      Yu, Choongho; Hao, Qing; Saha, Sanjoy; Shi, Li; Kong, Xiang Yang; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2005-01-31)
      We have assembled tin dioxide nanobelts with low-power microheaters for detecting dimethyl methylphosphonate (DMMP), a nerve agent simulant. The electrical conductance of a heated nanobelt increased for 5% upon exposure ...
    • 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: ...
    • Interface structures in FePt/Fe₃Pt hard-soft exchange-coupled magnetic nanocomposites 

      Li, Jing; Wang, Z. L. (Zhong Lin); Zeng, Hao; Sun, Shouheng; Liu, J. Ping (Georgia Institute of TechnologyAmerican Institute of Physics, 2003-05-26)
      Self-assembly of FePt and Fe₃O₄ nanoparticles of different sizes led to various FePt–Fe₃O₄ nanocomposites. Annealing the composite under reducing atmosphere at 650 and 700 °C induced magnetically hard FePt phase and ...
    • Interparticle interactions in annealed FePt nanoparticle assemblies 

      Zeng, Hao; Li, Jing; Wang, Z. L. (Zhong Lin); Liu, J. Ping; Sun, Shouheng (Georgia Institute of Technology, 2002-09)
      Thermal treatment of self-assembled FePt nanoparticles reduces the interparticle distances, resulting in dramatic changes in the type and strength of interparticle interactions. Consequently, magnetic properties such as ...
    • Interphase exchange coupling in Fe/Sm–Co bilayers with gradient Fe thickness 

      Yu, Ming-hui; Hattrick-Simpers, Jason; Takeuchi, Ichiro; Li, Jing; Wang, Z. L. (Zhong Lin); Liu, J. Ping; Lofland, S. E.; Tyagi, Somdev; Freeland, J. W.; Giubertoni, D.; Bersani, M.; Anderle, M. (Georgia Institute of TechnologyAmerican Institute of Physics, 2005-09-30)
      We have fabricated Fe/Sm–Co bilayers with gradient Fe thicknesses in order to systematically study the dependence of exchange coupling on the thickness of the Fe layer. The Fe layer was deposited at two different temperatures ...
    • Large enhancement in photon detection sensitivity via Schottky-gated CdS nanowire nanosensors 

      Wei, Te-Yu; Huang, Chi-Te; Hansen, Benjamin J.; Lin, Yi-Feng; Chen, Lih-Juann; Lu, Shih-Yuan; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2010-01-06)
      The Schottky contact based photon detection was demonstrated using CdS (visible light responsive), silicon (indirect n-type oxygen-non-adsorbing), and CuO (indirect p-type oxygen-adsorbing) nanowire nanosensors. With ...
    • Layered microdomains and columnar grains in epitaxial La₀.₇Ca₀.₃MnO₃ films and Y₀.₇Ca₀.₃MnO₃/La₀.₇Ca₀.₃MnO₃ multilayers 

      Lu, C. J.; Wang, Z. L. (Zhong Lin); Xiong, G. C.; Lian, G. J.; Xiong, G. C.; Lian, G. J. (Georgia Institute of TechnologyMaterials Research Society, 2000-11)
      Epitaxial La₀.₇Ca₀.₃MnO₃ thin film and [Y₀.₇Ca₀.₃MnO₃/La₀.₇Ca₀.₃MnO₃]₁₀ multilayers of about 140 nm in thickness were grown by pulsed laser deposition on (001)LaAlO₃. Their microstructures were investigated by transmission ...
    • Lead oxide nanobelts and phase transformation induced by electron beam irradiation 

      Pan, Zhengwei; Dai, Z. R.; Wang, Z. L. (Zhong Lin) (Georgia Institute of TechnologyAmerican Institute of Physics, 2002-01-14)
      β -PbO₂ nanobelts, with a rectangular cross section, a typical length of 10–200 µm, a width of 50–300 nm, and a width-to-thickness ratio of 5–10, have been successfully synthesized by simple elevated evaporation of commercial ...
    • Link-up of 90° domain boundaries with interface dislocations in BaTiO₃/LaAlO₃ 

      Dai, Z. R.; Wang, Z. L. (Zhong Lin); Duan, X. F.; Zhang, Jiming (Georgia Institute of TechnologyAmerican Institute of Physics, 1996-05-27)
      Interface microstructures of BaTiO₃/LaAlO₃ grown by metalorganic chemical vapor deposition(MOCVD) are studied using high-resolution transmission electron microscopy (HRTEM). Interface dislocations in BaTiO₃/LaAlO₃ have ...
    • Liquid-phase synthesis of thiol-derivatized silver nanocrystals 

      Murthy, Srihari; Bigioni, Terry P.; Wang, Z. L. (Zhong Lin); Khoury, Joseph T.; Whetten, R. L. (Georgia Institute of Technology, 1997)
      A liquid-phase method is reported for the preparation of dodecanethiol-derivatized silver nanocrystals. Toluene sols of this material maintain as sols in air at room temperature at least on the timescale of months. X-ray ...
    • Local texture and percolative paths for long-range conduction in high critical current density TlBa₂Ca₂Cu₃O₈₊ₓ deposits 

      Kroeger, D. M.; Goyal, A.; Specht, E. D.; Wang, Z. L. (Zhong Lin); Tkaczyk, J. E.; Sutliff, J. A.; DeLuca, J. A. (Georgia Institute of TechnologyAmerican Institute of Physics, 1994-01-03)
      A possible microstructural origin of the high critical current densities which have been obtained in c-axis-aligned, polycrystalline TlBa₂Ca₂Cu₃O₈₊ₓdeposits has been identified. The results of x-ray diffraction determinations ...
    • Low k, Porous Methyl Silsesquioxane and Spin-On-Glass 

      Kohl, Abbe T.; Mimna, Richard; Shick, Robert; Rhodes, Larry; Wang, Z. L. (Zhong Lin); Kohl, Paul A. (Georgia Institute of Technology, 1999)
      Low dielectric constant, porous silica was made from commercially available methyl silsesquioxane (MSQ) by the addition of a sacrificial polymer, substituted norbornene polymer containing triethoxysilyl groups (NB), to ...
    • Low-threshold two-photon pumped ZnO nanowire lasers 

      Zhang, Chunfeng; Zhang, Fan; Xia, Tian; Kumar, Nitin; Hahm, Jong-in; Liu, Jin; Wang, Z. L. (Zhong Lin); Xu, Jian (Georgia Institute of TechnologyOptical Society of America, 2009-05-11)
      We report in this communication the two-photon absorption (TPA)-induced room-temperature lasing performance of ZnO nanowires. Under femtosecond pulse-excitation at λ = 700 nm in the infrared regime, a remarkably low threshold ...
    • 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 ...