Diameter dependence of the minority carrier diffusion length in individual ZnO nanowires

Soudi, A.; Dhakal, P.; Gu, Y.
June 2010
Applied Physics Letters;6/21/2010, Vol. 96 Issue 25, p253115
Academic Journal
The minority carrier diffusion length, LD, was directly measured in individual ZnO nanowires by a near-field scanning photocurrent microscopy technique. The diameter dependence of LD suggests a diameter-dependent surface electronic structure, particularly an increase in the density of mid-band-gap surface states with the decreasing diameter. This diameter dependence of the surface electronic structure might be a universal phenomenon in wurtzite-type nanostructures, and is critical in interpreting and understanding the effects of surfaces on various material properties.


Related Articles

  • Secondary growth of small ZnO tripodlike arms on the end of nanowires. Zhang, Zengxing; Liu, Yuzi; Liu, Dongfang; Luo, Shudong; Shen, Jun; Liu, Lifeng; Ma, Wenjun; Ren, Yan; Xiang, Yanjuan; Zhou, Weiya; Xie, Sishen; Zheng, Kaihong; Zhao, Yuanchun; Sun, Lianfeng; Zou, Chenxia; Yu, Dapeng // Applied Physics Letters;7/2/2007, Vol. 91 Issue 1, p013106 

    Small zinc oxide tripodlike arms were assembled at the end of nanowires through thermal evaporation of zinc powder in a horizontal tube furnace. These arms are hundreds of nanometers in length, and they are tens of nanometers in diameter, similar to that of the based nanowires. High-resolution...

  • Fe solubility, growth mechanism, and luminescence of Fe doped ZnO nanowires and nanorods grown by evaporation-deposition. Alemán, Belén; Ortega, Yanicet; García, José Ángel; Fernández, Paloma; Piqueras, Javier // Journal of Applied Physics;Jul2011, Vol. 110 Issue 1, p014317 

    Fe doped ZnO nanowires, nanorods, and urchin-like nanostructures have been grown using an evaporation-deposition method with compacted mixtures of ZnS and Fe2O3 powders, with different Fe contents as precursors. Treatments at 950 °C under argon flow lead to the growth of iron doped nanowires,...

  • Low-temperature (∼250 °C) route to lateral growth of ZnO nanowires. Congkang Xu; Keehan Rho; Junghwan Chun; Dong-Eon Kim // Applied Physics Letters;12/19/2005, Vol. 87 Issue 25, p253104 

    Zinc oxide nanowires were obtained through a vapor transport route at temperatures as low as around 250 °C. The diameters of the nanowires are ∼40 nm and their lengths reach up to a few microns. The high-resolution transmission electron microscopy showed that ZnO nanowires are of...

  • Parametric Study on Dimensional Control of ZnO Nanowalls and Nanowires by Electrochemical Deposition. Pradhan, Debabrata; Sindhwani, Shrey; Leung, K. // Nanoscale Research Letters;Nov2010, Vol. 5 Issue 11, p1727 

    simple electrochemical deposition technique is used to synthesize both two-dimensional (nanowall) and one-dimensional (nanowire) ZnO nanostructures on indium-tin-oxide-coated glass substrates at 70°C. By fine-tuning the deposition conditions, particularly the initial Zn(NO)·6HO electrolyte...

  • Growth and optical properties of nanowires. Bose, P.; Oudhia, A.; Shukla, N. // Recent Research in Science & Technology;Aug2012, Vol. 4 Issue 8, p135 

    The present paper reviews the growth mechanism, processes and optical properties of nanowires with special reference to ZnO. A brief description of free standing vertical nanowires of ZnO grown in our lab is also included.

  • Structural, morphological, optical and photocatalytic properties of Ag-doped ZnO nanoparticles. Kumar, Suresh; Singh, Virender; Tanwar, Amit // Journal of Materials Science: Materials in Electronics;Feb2016, Vol. 27 Issue 2, p2166 

    In this work, pure ZnO and Ag-doped ZnO nanoparticles (NPs) have been synthesized by the simple sol-gel route. The studies on as-synthesized ZnO and Ag-doped ZnO NPs have been conducted using X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy (TEM),...

  • Synthesis and Characterization of ZnO Nanowire–CdO Composite Nanostructures. Senthil, Karuppanan; Youngjo Tak; Minsu Seol; Kijung Yong // Nanoscale Research Letters;Nov2009, Vol. 4 Issue 11, p1329 

    ZnO nanowire–CdO composite nanostructures were fabricated by a simple two-step process involving ammonia solution method and thermal evaporation. First, ZnO nanowires (NWs) were grown on Si substrate by aqueous ammonia solution method and then CdO was deposited on these ZnO NWs by thermal...

  • Direct to indirect band gap transition in ultrathin ZnO nanowires under uniaxial compression. Yang Zhang; Yu-Hua Wen; Jin-Cheng Zheng; Zi-Zhong Zhu // Applied Physics Letters;3/16/2009, Vol. 94 Issue 11, p113114 

    The direct to indirect band gap transition in ultrathin [0001] ZnO nanowires with the structural transformation from the regular wurtzite structure to a more close-packed hexagonal structure during uniaxial compression is studied by using the first-principles calculations. The results show that...

  • Structural, mechanical, and electronic properties of ultrathin ZnO nanowires. Wang, Baolin; Zhao, Jijun; Jia, Jianming; Shi, Daning; Wan, Jianguo; Wang, Guanghou // Applied Physics Letters;7/14/2008, Vol. 93 Issue 2, p021918 

    We report a structural transformation between the regular wurtzite and the unbuckled wurtzite (hexagonal) structure for ultrathin single-crystalline [0001] ZnO nanowires under uniaxial elongation and compression. Our density functional calculations show that hexagonal structure corresponds to a...


Read the Article


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

Try another library?
Sign out of this library

Other Topics