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  1. No Access

    Article

    Surface carbon layer and visible-light photocatalytic activities of carbon-coated TiO 2 nanotubes synthesized in organic electrolytes

    TiO2 nanotubes (NTs) are synthesized by anodization of a titanium foil in organic electrolytes, followed by thermal treatment in O2 at different temperatures. These TiO2 NTs exhibit visible-light photocatalytic a...

    Y. Y. Zhang, X. L. Wu, L. Z. Liu, T. H. Li, Paul K. Chu in Applied Physics A (2011)

  2. No Access

    Article

    Si–Si optical phonon behavior in localized Si clusters of Si x Ge1−x  alloy nanocrystals

    Raman spectra acquired from Si x Ge1−x -nanocrystal-embedded SiO2 films show dependence of the Si–Si optical phonon frequency on Si content. The frequency...

    L. Z. Liu, X. L. Wu, Y. M. Yang, T. H. Li, Paul K. Chu in Applied Physics A (2011)

  3. No Access

    Article

    Green light stimulates terahertz emission from mesocrystal microspheres

    The discovery of efficient sources of terahertz radiation has been exploited in imaging applications1, and develo** a nanoscale terahertz source could lead to additional applications. High-frequency mechanical ...

    X. L. Wu, S. J. **ong, Z. Liu, J. Chen, J. C. Shen, T. H. Li… in Nature Nanotechnology (2011)

  4. No Access

    Article

    Surface-enhanced Raman scattering from silver nanostructures with different morphologies

    Scanning electron microscopy and X-ray diffraction reveal that four different types of crystalline silver nanostructures including nanoparticles, nanowires, nanocubes, and bipyramids are synthesized by a solvo...

    W. C. Zhang, X. L. Wu, C. X. Kan, F. M. Pan, H. T. Chen, J. Zhu… in Applied Physics A (2010)

  5. No Access

    Article

    A novel hydrothermal route to synthesize solid SnO2 nanospheres and their photoluminescence property

    Solid tin oxide (SnO2) nanospheres were fabricated via one-step hydrothermal treatment of tin foil in aqueous alkaline solutions at 180°C. Based on the time-dependent experiments, the evolution behavior of Ostwal...

    H. T. Chen, X. L. Wu, Y. Y. Zhang, J. Zhu, Y. C. Cheng, Paul K. Chu in Applied Physics A (2009)

  6. No Access

    Article

    Porous silicon based β-FeSi2 and photoluminescence

    Highly-pure iron powder was covered on porous silicon for fabricating semiconducting β-FeSi2 structures. X-ray diffraction and Raman scattering results confirm the formation of pure-phase β-FeSi2 after high-tempe...

    H. T. Chen, X. L. Wu, Y. Y. Zhang, W. N. Su in Applied Physics A (2009)

  7. No Access

    Article

    Red photoluminescence mechanism in SnO2 nanostructures

    Tin dioxide nanoribbons were fabricated for clarifying the origin of the red photoluminescence band. It is found that the red band abruptly decreases its intensity after annealing the nanoribbons in O2. The time-...

    H. T. Chen, X. L. Wu, S. J. **ong, W. C. Zhang, J. Zhu in Applied Physics A (2009)

  8. No Access

    Article

    The defect density of a SiNx/In0.53Ga0.47As interface passivated using (NH4)2Sx

    Passivation of the electronic defect states at a SiNx/InGaAs interface has been achieved using (NH4)2Sx treatments of the InGaAs surface. The X-ray photoelectron spectroscopy technique was used to investigate the...

    H.J. Tang, X.L. Wu, K.F. Zhang, Y.F. Li, J.H. Ning, Y. Wang, X. Li… in Applied Physics A (2008)

  9. No Access

    Article

    Synthesis and field-emission properties of roselike ZnO nanostructures

    Self-assembled roselike ZnO nanostructures were synthesized via thermal evaporation of zinc powders without catalytic assistance at the relatively low temperature of 550 °C. The roselike structures consist of ...

    L.L. Xu, X.L. Wu, X. **ong, J. Zhu, H.T. Chen, G.S. Huang, P.K. Chu in Applied Physics A (2008)

  10. No Access

    Article

    Observation of spontaneous pattern with six-fold symmetry in disk-shaped ZnO complex microstructures

    Using a simple vapor phase transport technique, we have fabricated unique complex disk-shaped ZnO microstructures comprising a small disk coaxially grown on a large one and observed spatially perfect six-fold ...

    L.W. Yang, Y.J. Gao, X.L. Wu, Y.M. Yang, G.S. Huang, Z.Y. Zhang… in Applied Physics A (2007)

  11. No Access

    Article

    Accommodation of large plastic strains and defect accumulation in nanocrystalline Ni grains

    A transmission electron microscopy (TEM) study has been carried out to uncover how dislocations and twins accommodate large plastic strains and accumulate in very small nanocrystalline Ni grains during low-tem...

    X.L. Wu, E. Ma in Journal of Materials Research (2007)

  12. No Access

    Article

    Fabrication and characterization of anodic ZnO nanoparticles

    We have successfully fabricated ZnO nanoparticles by anodizing Zn sheet in 0.1 M sodium hydroxide solution. Morphology observations demonstrate that the sizes of the ZnO nanoparticles have a tendency to increa...

    G.S. Huang, X.L. Wu, Y.C. Cheng, J.C. Shen, A.P. Huang, P.K. Chu in Applied Physics A (2007)

  13. Article

    Dislocation propagation versus dislocation nucleation

    E. Ma, T. D. Shen, X. L. Wu in Nature Materials (2006)

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  14. No Access

    Article

    Temperature-dependent photoluminescence from MEH-PPV and MEH-OPPV containing oxadiazole in the main chain

    We report the temperature-dependent photoluminescence (PL) behavior of two poly (p-phenylene-vinylene) derivatives with different backbones, a homopolymer poly-[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene-vinyl...

    F. Kong, X.L. Wu, G.S. Huang, R.K. Yuan, C.Z. Yang, P.K. Chu, G.G. Siu in Applied Physics A (2006)

  15. No Access

    Article

    Less is more

    Annealing out dislocations in deformed metals usually leads to reduced strength and increased ductility. Exactly the opposite has been observed in bulk nanostructured aluminium.

    E. Ma, T. D. Shen, X.L. Wu in Nature Materials (2006)

  16. No Access

    Article

    Si-based solid blue emitters from 3C-SiC nanocrystals

    A procedure for preparing 3C-SiC/SiO2 composite nanocrystals embedded in Si matrix that emit blue light is reported. Through electrochemical etching of polycrystalline 3C-SiC wafers followed by ultrasonic treatme...

    J.Y. Fan, X.L. Wu, H.X. Li, H.W. Liu, G.S. Huang, G.G. Siu, P.K. Chu in Applied Physics A (2006)

  17. No Access

    Article

    Dependence of blue-emitting property on nanopore geometrical structure in Al-based porous anodic alumina membranes

    Porous anodic alumina (PAA) membranes were fabricated using anodization of Al foils. Based on morphology observations and photoluminescence (PL) measurements, it is revealed that the peak position of the obser...

    G.S. Huang, X.L. Wu, L.W. Yang, X.F. Shao, G.G. Siu, P.K. Chu in Applied Physics A (2005)

  18. No Access

    Article

    Self-catalytic synthesis and light-emitting property of highly aligned Mn-doped Zn2SiO4 nanorods

    Highly aligned Mn-doped Zn2SiO4 nanorods were fabricated by using a modified vapor-phase evaporation method. Their microstructure and chemical bond configurations were investigated with the help of X-ray diffract...

    L.W. Yang, X.L. Wu, G.S. Huang, T. Qiu, Y.M. Yang, G.G. Siu in Applied Physics A (2005)

  19. No Access

    Article

    Self-organized synthesis of silver dendritic nanostructures via an electroless metal deposition method

    Unique silver dendritic nanostructures, with stems, branches, and leaves, were synthesized with self-organization via a simple electroless metal deposition method in a conventional autoclave containing aqueous...

    T. Qiu, X.L. Wu, Y.F. Mei, P.K. Chu, G.G. Siu in Applied Physics A (2005)

  20. No Access

    Article

    Alumina nanotubes and nanowires from Al-based porous alumina membranes

    Using ultrasonic vibrations, we have successfully fabricated alumina nanotubes and nanowires from Al-based porous alumina membranes, which are the products of bulk aluminium in oxalic acid via electrochemical ...

    X.F. Shao, X.L. Wu, G.S. Huang, T. Qiu, M. Jiang, J.M. Hong in Applied Physics A (2005)

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