X-ray measurements of the strain and shape of dielectric/metallic wrap-gated InAs nanowires

Eymery, J.; Favre-Nicolin, V.; Fröberg, L.; Samuelson, L.
March 2009
Applied Physics Letters;3/30/2009, Vol. 94 Issue 13, p131911
Academic Journal
Wrap-gate (111) InAs nanowires (NWs) were studied after HfO2 dielectric coating and Cr metallic deposition by a combination of grazing incidence x-ray techniques. In-plane and out-of-plane x-ray diffraction (crystal truncation rod analysis) allow determining the strain tensor. The longitudinal contraction, increasing with HfO2 and Cr deposition, is significantly larger than the radial dilatation. For the Cr coating, the contraction along the growth axis is quite large (-0.95%), and the longitudinal/radial deformation ratio is >10, which may play a role on the NW transport properties. Small angle x-ray scattering shows a smoothening of the initial hexagonal bare InAs NW shape and gives the respective core/shell thicknesses, which are compared to flat surface values.


Related Articles

  • A new approach to understanding the mechanisms of diffraction imaging of dislocations in X-ray topography. Suvorov, E.; Smirnova, I. // Technical Physics Letters;Nov2012, Vol. 38 Issue 11, p991 

    Regularities in the formation of diffraction imaging of dislocations are studied by numerical modeling and experimental section X-ray topography. The study of X-ray scattering by irregularities of the crystal lattice is of interest for several reasons. First, the contrast of defects is connected...

  • Optimization of milling parameters on the synthesis of stearic acid coated CaCO nanoparticles. Deepika; Hait, S.; Chen, Y. // Journal of Coatings Technology & Research;Mar2014, Vol. 11 Issue 2, p273 

    Surface modification of precipitated calcium carbonate particles (calcite) in a planetary ball mill using stearic acid as a modification agent for making dispersion in hydrocarbon oil was investigated. Different parameters for processing (milling) such as milling time, ball-to-sample ratio, and...

  • Effect of Co doping on the static dielectric constant of ZnO nanoparticles. Ghosh, C. K.; Chattopadhyay, K. K.; Mitra, M. K. // Journal of Applied Physics;6/15/2007, Vol. 101 Issue 12, p124911 

    Co doped ZnO nanoparticles were synthesized by a simple rheological phase reaction-precursors method using zinc acetate, cobalt acetate, and oxalic acid for different atomic percentages of Co doping. X-ray diffraction studies confirmed the correct phase formation, and the composition were...

  • X-ray and neutron scattering studies of the structure of hyperquenched glassy water. Bellissent-Funel, M. C.; Bosio, L.; Hallbrucker, A.; Mayer, E.; Sridi-Dorbez, R. // Journal of Chemical Physics;7/15/1992, Vol. 97 Issue 2, p1282 

    X-ray and neutron diffraction measurements were performed on glassy water prepared by rapid cooling of water droplets on a cryoplate. Structure factors and radial distribution functions were found to be nearly identical to those obtained from amorphous ice formed either by vapor deposition onto...

  • Effect of Si content on thermal stability of CrAl(Si)N coatings. Zhitong Chen; Guangjian Peng; Yuan Xia; Guang Li // Applied Mechanics & Materials;2015, Vol. 799-800, p448 

    The effect of annealing temperatures on surface morphologies, microstructure, and mechanical behaviors of CrAlSiN coatings with different Si content was investigated. EDX, XRD and SEM were employed to reveal the compositions and microstructure of CrAlSiN coatings. For Si content ≤8.6%,...

  • Early stage of plastic deformation in thin films undergoing electromigration. Valek, B.C.; Tamura, N.; Spolenak, R.; Caldwell, W.A.; MacDowell, A.A.; Celestre, R.S.; Padmore, H.A.; Bravman, J.C.; Batterman, B.W.; Nix, W.D.; Patel, J.R. // Journal of Applied Physics;9/15/2003, Vol. 94 Issue 6, p3757 

    Reports on the discovery of an early prefailure mode of plastic deformation involving preferential dislocation generation and motion using synchrotron-based x-ray microdiffraction during an in situ electromigration experiment. Occurrence of the behavior long before macroscopic damage is observed.

  • Structural characterization of nanocrystalline copper by means of x-ray diffraction. Zhang, K.; Alexandrov, I. V.; Valiev, R. Z.; Lu, K. // Journal of Applied Physics;11/15/1996, Vol. 80 Issue 10, p5617 

    Presents a study which performed quantitative x-ray diffraction measurements on a nanocrystalline copper sample made by severe plastic deformation. Experimental results; Discussion and conclusions.

  • X-ray-diffraction analysis of complex structures in ZnCdSe/ZnSe strained-layer superlattices. Nakashima, Kiichi; Kawaguchi, Yoshihiro // Journal of Applied Physics;11/1/1994, Vol. 76 Issue 9, p5111 

    Focuses on a generalized and refined method for analyzing the discrimination of fundamental peaks in x-ray-diffraction measurements of strained-layer superlattice (SLS) structures. Proposed criteria for investigating lattice relaxation and coherent deformation of relevant layers; Information on...

  • A Grazing-Incidence Small-Angle X-Ray Scattering View of Vertically Aligned ZnO Nanowires. Lavčević, M. Lučić; Dubček, P.; Bernstorff, S.; Pavlovič, M.; Šilović, L. // Journal of Nanomaterials;2013, p1 

    We report a grazing-incidence small-angle X-ray scattering study of ZnO films with vertically aligned and randomly distributed nanowires, grown through a hydrothermal growth process on nanostructured ZnO seeding coatings and deposited by electron beam evaporation on silicon and glass,...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics