Local luminescence of ZnO nanowire-covered surface: A cathodoluminescence microscopy study

Fan, H. J.; Scholz, R.; Zacharias, M.; Gösele, U.; Bertram, F.; Forster, D.; Christen, J.
January 2005
Applied Physics Letters;1/10/2005, Vol. 86 Issue 2, p023113
Academic Journal
Vertically aligned ZnO nanowires were synthesized on sapphire through vapor deposition using Au as a catalyst. In addition to the nanowires, the sample surface contained a thin wetting layer of ZnO clusters. Spatially and spectrally resolved cathodoluminescence (CL) microscopy was applied to correlate the luminescent properties and the sample structure. Local CL spectra and monochromatic images revealed that the nanowires are the major source for a strong and sharp I8 emission line, while two weak emissions at low energies originate exclusively from the wetting layer. Information on stress is also obtained from the relative position of the I8 line.


Related Articles

  • Synthesis of well-aligned ZnO nanowires by simple physical vapor deposition on c-oriented ZnO thin films without catalysts or additives. Wang, Lisheng; Zhang, Xiaozhong; Zhao, Songqing; Zhou, Guoyuan; Zhou, Yueliang; Qi, Junjie // Applied Physics Letters;1/10/2005, Vol. 86 Issue 2, p024108 

    Well-aligned ZnO nanowires were synthesized by simple physical vapor deposition using c-oriented ZnO thin films as substrates without catalysts or additives. The synthesized ZnO nanowires have two typical average diameters: 60 nm in majority and 120 nm in minority. They are about 4 μm in...

  • Characterization and Fabrication of ZnO Nanowires Grown on AlN Thin Film. Yousefi, Ramin; Kamaluddin, Burhanuddin; Ghoranneviss, Mahmood; Hajakbari, Fatemeh // AIP Conference Proceedings;7/7/2009, Vol. 1150 Issue 1, p371 

    In this paper, we report ZnO nanowires grown on AlN thin film deposited on glass as substrate by physical vapour deposition. The temperature of substrates was kept between 600° C and 500° C during the growth. The typical average diameters of the obtained nanowires on substrate at 600° C...

  • ZnO nanowires and nanobelts: Shape selection and thermodynamic modeling. Fan, Hong Jin; Barnard, Amanda S.; Zacharias, Margit // Applied Physics Letters;4/2/2007, Vol. 90 Issue 14, p143116 

    The authors show that, during a steady-state vapor phase growth of ZnO nanomaterials, indium doping causes the structural change from usual [0001]-axial short nanowires to [formula]-axial nanobelts of much larger aspect ratio. They used an analytical thermodynamic model based on geometric...

  • Orientation-dependent x-ray absorption fine structure of ZnO nanorods. Han, S.-W.; Yoo, H.-J.; An, Sung Jin; Yoo, Jinkyoung; Yi, Gyu-Chul // Applied Physics Letters;1/10/2005, Vol. 86 Issue 2, p021917 

    The local structure of two samples of vertically well-aligned ZnO nanorods with average diameters of 13 and 37 nm were studied using orientation-dependent x-ray absorption fine structure (XAFS) at the Zn K edge. The aligned ZnO nanorod samples were fabricated on sapphire (0001) substrates with a...

  • Excitonic origin of enhanced luminescence quantum efficiency in MgZnO/ZnO coaxial nanowire heterostructures. Yoo, Jinkyoung; Chon, Bonghwan; Tang, Wei; Joo, Taiha; Dang, Le Si; Yi, Gyu-Chul // Applied Physics Letters;5/28/2012, Vol. 100 Issue 22, p223103 

    The effect of exciton transport on luminescence efficiency was investigated by time-resolved photoluminescence and spatially resolved cathodoluminescence spectroscopy. The internal quantum efficiency of ZnO nanowire (NW) increased from 45% to 56% due to formation of a MgZnO/ZnO coaxial NW...

  • Cu-doping induced ferromagnetism in ZnO nanowires. Congkang Xu; Kaikun Yang; Liwei Huang; Wang, Howard // Journal of Chemical Physics;3/28/2009, Vol. 130 Issue 12, p124711 

    Cu-doped and undoped ZnO nanowires have been successfully fabricated at 600 °C using a vapor transport approach. Comprehensive structural analyses on as-fabricated nanowires reveal highly crystalline ZnO nanowires with 0.5 at. % of substitutional Cu doping. Ferromagnetism has been observed in...

  • Lasing with guided modes in ZnO nanorods and nanowires. Zalamai, V. V.; Ursaki, V. V.; Klingshirn, C.; Kalt, H.; Emelchenko, G. A.; Redkin, A. N. // Applied Physics B: Lasers & Optics;Dec2009, Vol. 97 Issue 4, p817 

    A vertically arranged nearly parallel array of ZnO nanorods and randomly oriented nanowires has been grown by low pressure chemical vapor deposition (CVD) on silica substrates and on stainless steel gauze woven from a wire with a diameter of 40 μm, respectively. The quality of the produced...

  • Surface traps in vapor-phase-grown bulk ZnO studied by deep level transient spectroscopy. Fang, Z.-Q.; Claflin, B.; Look, D. C.; Dong, Y. F.; Mosbacker, H. L.; Brillson, L. J. // Journal of Applied Physics;Sep2008, Vol. 104 Issue 6, p063707 

    Deep level transient spectroscopy, current-voltage, and capacitance-voltage measurements are used to study interface traps in metal-on-bulk-ZnO Schottky barrier diodes (SBDs). c-axis-oriented ZnO samples were cut from two different vapor-phase-grown crystals, and Au- and Pd-SBDs were formed on...

  • Ultralow threshold field emission from a single multipod structure of ZnO. Ramgir, Niranjan S.; Mulla, Imtiaz S.; Vijayamohanan, K.; Late, Dattatray J.; Bhise, Ashok B.; More, Mahendra A.; Joag, Dilip S. // Applied Physics Letters;1/23/2006, Vol. 88 Issue 4, p042107 

    The field emission of individual ZnO multipods and a single arm of a multipod structure grown by a vapor deposition were carried out. A current of 1 nA with an ultralow onset voltage of 40 V was observed repeatedly for the single multipod as well as for the arm. The nonlinearity observed in the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics