Field-emission studies on thin films of zinc oxide nanowires

Jo, S. H.; Lao, J. Y.; Ren, Z. F.; Farrer, R. A.; Baldacchini, T.; Fourkas, J. T.
December 2003
Applied Physics Letters;12/8/2003, Vol. 83 Issue 23, p4821
Academic Journal
Studies on field emission (FE) from thin films of zinc oxide (ZnO) nanowires found that both the turn-on voltage and emission current density depend on the areal density of nanowires. The density of ZnO nanowires is controlled by the gold (Au) nanoparticle density deposited on the silicon substrates. The growth of ZnO nanowires was achieved by the thermal evaporation/condensation method. It is shown that the same screening effect observed on carbon nanotube field emitters also affects the FE from thin films of ZnO nanowires. Thin films with the lowest areal density of ZnO nanowires showed much better FE characteristics, comparable to that of carbon nanotubes. More importantly, the FE characteristics of ZnO nanowire thin film were further improved with annealing in hydrogen. © 2003 American Institute of Physics.


Related Articles

  • ZnO nanowire arrays grown on Al:ZnO buffer layers and their enhanced electron field emission. Chen, Z. H.; Tang, Y. B.; Liu, Y.; Yuan, G. D.; Zhang, W. F.; Zapien, J. A.; Bello, I.; Zhang, W. J.; Lee, C. S.; Lee, S. T. // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p064303-1 

    Arrays of highly ordered ZnO nanowires have been synthesized on polycrystalline Al-doped ZnO (AZO) buffer layers prepared on p-Si substrates (7–13 Ω cm) with assistance of a thermal deposition method. The diameter and interspacing of the nanowires have been controlled by the growth...

  • Investigation on Nanostructure and Morphologies of ZnO Nanowires Prepared by Hydrothermal Method. Khamkhom, Phattharaphong; Horprathum, Mati; Eiamchai, Pitak.; Chananonnawathorn, Chanunthorn; Kaewkhao, Jakrapong // Advanced Materials Research;2014, Vol. 979, p192 

    In this study, we controlled nanostructure and morphologies of the vertically aligned zinc oxide nanowires (ZnO NWs) on 200 nm-thick zinc oxide seed layer. The ZnO nanowires were synthesized by the hydrothermal method at 90°C for 6 hours in the precursor solutions. The solutions with four...

  • ZnO nanowires formed on tungsten substrates and their electron field emission properties. Dong, Lifeng; Jiao, Jun; Tuggle, David W.; Petty, Jeremy M.; Elliff, Stephen A.; Coulter, Michael // Applied Physics Letters;2/17/2003, Vol. 82 Issue 7, p1096 

    Using a vapor transport method, ZnO nanowires were selectively synthesized both on tungsten tips as electron field emitters and on tungsten plates with designed patterns. Control of the growth locations of the nanowires was accomplished by selectively positioning a thin film of Au catalyst. The...

  • Enhanced field emission from ZnO nanowires grown on a silicon nanoporous pillar array. Hai Jun Xu; Yu Fei Chan; Lei Su; De Yao Li; Xiao Ming Sun // Journal of Applied Physics;Dec2010, Vol. 108 Issue 11, p114301 

    A large scale heterostructure array of ZnO nanowires/silicon nanoporous pillar array (Si-NPA) was prepared by a self-catalytic thermal evaporation and vapor-phase transport method, and an ultrahigh field emission current density of 1.55 mA cm-2 was obtained under an operating electric field of...

  • Large area, rapid growth of two-dimensional ZnO nanosheets and their field emission performances. Kok Chung Chin; Chee Kok Poh; Ghee Lee Chong; Jianyi Lin; Chorng Ha Ur Sow; Wee, Andrew Thye Shen // Applied Physics A: Materials Science & Processing;Mar2008, Vol. 90 Issue 4, p623 

    We demonstrate an improved and rapid method to synthesize uniform two-dimensional ZnO nanosheets at low temperature. These nanosheets can be prepared within an hour. The compositions and morphologies of the nanosheets produced were characterized by SEM, XRD, Raman and photoluminescence analysis....

  • Defect induced high photocurrent in solution grown vertically aligned ZnO nanowire array films. Kushwaha, Ajay; Aslam, M. // Journal of Applied Physics;Sep2012, Vol. 112 Issue 5, p054316 

    Highly oriented and homogeneously distributed single crystalline zinc oxide nanowires (NWs) are fabricated on amorphous glass substrates using soft solution growth approach. The nanowire films and sol-gel grown ZnO films are devised and tested for UV light detection applying four-probe...

  • Formation and characterization of carbon nanowires. Kumar, Amit; Avasthi, D. K.; Tripathi, A.; Filip, L. D.; Carey, J. D.; Pivin, J. C. // Journal of Applied Physics;8/15/2007, Vol. 102 Issue 4, p044305 

    This article reports on the formation and electronic characteristics of conducting carbon nanowires produced by swift heavy ion irradiation of a fullerene thin film. This study shows that it is possible to create arrays of carbon nanowires, which are perfectly parallel to each other and...

  • Field emission behavior of vertically aligned ZnO nanowire planar cathodes. Semet, V.; Binh, Vu Thien; Pauporté, Th.; Joulaud, L.; Vermersch, F. J. // Journal of Applied Physics;Mar2011, Vol. 109 Issue 5, p054301 

    A field emission (FE) study by scanning anode field emission microscopy was performed to evaluate the FE properties of vertically aligned zinc oxide (ZnO) nanowire arrays electrodeposited on a plane conductive surface. The specific FE behaviors of the cathode observed experimentally are (1) a...

  • Density-controlled growth of aligned ZnO nanowire arrays by seedless chemical approach on smooth surfaces. Sheng Xu; Changshi Lao; Weintraub, Benjamin; Zhong Lin Wang // Journal of Materials Research;Aug2008, Vol. 23 Issue 8, p5 

    A novel ZnO seedless chemical approach for density-controlled growth of ZnO nanowire (NW) arrays has been developed. The density of ZnO NWs is controlled by changing the precursor concentration. Effects of both growth temperature and growth time are also investigated. By this novel synthesis...


Read the Article


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

Try another library?
Sign out of this library

Other Topics