Size-dependent recombination dynamics in ZnO nanowires

Reparaz, J. S.; Güell, F.; Wagner, M. R.; Hoffmann, A.; Cornet, A.; Morante, J. R.
February 2010
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p053105
Academic Journal
A deep understanding of the recombination dynamics of ZnO nanowires (NWs) is a natural step for a precise design of on-demand nanostructures based on this material system. In this work we investigate the influence of finite-size on the recombination dynamics of the neutral bound exciton around 3.365 eV for ZnO NWs with different diameters. We demonstrate that the lifetime of this excitonic transition decreases with increasing the surface-to-volume ratio due to a surface induced recombination process. Furthermore, we have observed two broad transitions around 3.341 and 3.314 eV, which were identified as surface states by studying the dependence of their life time and intensitiy with the NWs dimensions.


Related Articles

  • Three-dimensional nanofabrication by electron-beam-induced deposition using 200-keV electrons in scanning transmission electron microscope. Liu, Z.Q.; Mitsuishi, K.; Furuya, K. // Applied Physics A: Materials Science & Processing;Apr2005, Vol. 80 Issue 7, p1437 

    Attempts were made to fabricate three-dimensional nanostructures on and out of a substrate by electron-beam-induced deposition in a 200-kV scanning transmission electron microscope. Structures with parallel wires over the substrate surface were difficult to fabricate due to the direct deposition...

  • Hydrothermal synthesis and microstructure investigation of nanostructured bismuth telluride powder. Zhao, X.B.; Ji, X.H.; Zhang, Y.H.; Cao, G.S.; Tu, J.P. // Applied Physics A: Materials Science & Processing;Apr2005, Vol. 80 Issue 7, p1567 

    Nanostructured thermoelectric Bi2Te3 powders with various morphologies were hydrothermally synthesized using different precursors and routes to give an experimental comprehension on the formation of the nanopowders. It was found that the polyhedral Bi2Te3 particles are formed by surface...

  • Dynamical response in resonance interaction in coupled quantum wires. Morimoto, T.; Sasaki, T.; Aoki, N.; Ochiai, Y.; Shailos, A.; Bird, J. P.; Lilly, M. P.; Reno, J. R.; Simmons, J. A. // AIP Conference Proceedings;2005, Vol. 772 Issue 1, p913 

    We have studied the electrical transport property of the coupled Quantum Point Contacts. That resonance peak structure has appeared in conductance of the detector QPC by forming of local spin moment in swept QPC. We find that resonance peak depends on the one-dimensional density of states in...

  • Templated Growth and Selective Functionalization of Magnetic Nanowires. van Belle, F.; Palfreyman, J. J.; Lew, W. S.; Mitrelias, T.; Bland, J. A. C. // AIP Conference Proceedings;8/1/2008, Vol. 1025 Issue 1, p34 

    Magnetic nanowires are considered as an alternative to magnetic or coloured beads for the labeling of biological entities. Single metal and multisegment magnetic nanowires of lengths between 5–20 μm have been grown, magnetically characterized and released, and selective...

  • Lattice thermal conductivity of Si nanowires: Effect of modified phonon density of states. Lü, Xiang // Journal of Applied Physics;Sep2008, Vol. 104 Issue 5, p054314 

    We investigate the size-dependent lattice thermal conductivity of silicon (Si) square cross-sectional and cylindrical nanowires. The calculation includes the modifications of the phonon density of states and group velocities due to phonon confinement. The decrease in phonon density of states and...

  • Growth of SiOx nanowire bunches cocatalyzed with Ga and Ni. Cai, X. M.; Djurišić, A. B.; Xie, M. H. // Journal of Applied Physics;10/1/2005, Vol. 98 Issue 7, p074313 

    SiOx nanowire bunches were fabricated on Ni(NO3)2*6H2O solution-coated Si(111) substrates in a chemical vapor deposition system in the presence of Ga and under the flow of Ar and NH3 gases. The roles of nickel nitrate hydrate, gallium, and ammonia in the formation of SiOx nanowire bunches were...

  • Electronic structure of free-standing InP and InAs nanowires. Lassen, B.; Willatzen, M.; Melnik, R.; Lew Yan Voon, L. C. // Journal of Materials Research;Nov2006, Vol. 21 Issue 11, p27 

    An eight-band k·p theory that does not suffer from the spurious solution problem is demonstrated. It is applied to studying the electronic properties of InP and InAs free-standing nanowires. Band gaps and effective masses are reported as a function of size, shape, and orientation of the...

  • Size dependency of the elastic modulus of ZnO nanowires: Surface stress effect. Wang, Guofeng; Li, Xiaodong // Applied Physics Letters;12/3/2007, Vol. 91 Issue 23, p231912 

    Relation between the elastic modulus and the diameter (D) of ZnO nanowires was elucidated using a model with the calculated ZnO surface stresses as input. We predict for ZnO nanowires due to surface stress effect: (1) when D>20 nm, the elastic modulus would be lower than the bulk modulus and...

  • Structural variation of hydrothermally synthesized KNbO3 nanowires. Joung, Mi-Ri; Xu, HaiBo; Kim, Jin-Seong; Seo, In-Tae; Nahm, Sahn; Kang, Jong-Yun; Yoon, Seok-Jin // Journal of Applied Physics;Jun2012, Vol. 111 Issue 11, p114314 

    KNbO3 (KN) nanowires were synthesized using various process conditions and their structures and morphologies were investigated. Homogeneous KN nanowires were formed in specimens synthesized at 130 °C for 24.0-48.0 h. These KN nanowires have a tetragonal structure that is known to be stable at...


Read the Article


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

Try another library?
Sign out of this library

Other Topics