Ladder-like metal oxide nanowires: Synthesis, electrical transport, and enhanced light absorption properties
In2O3, SnO2, nanowires, field-effect transistors, photodetectors, finite-difference time-domain
Transparent metal oxide nanowires (NWs) have attracted intense research interest in recent years. We report here the synthesis of interesting ladder-like metal oxide NWs, including In2O3, SnO2, ZnO, and Ga2O3, via a facile chemical vapor deposition (CVD) method. Their structural features and growth mechanism are demonstrated in detail by using the ladder-like In2O3 NWs as an example. Single ladder-like NW-based field-effect transistors (FETs) and photodetectors (PDs) of SnO2 were fabricated in order to investigate their electrical transport and light absorption properties. Compared with straight NW-based FETs which operate in an enhancement mode (E-mode), FETs build on ladder-like NWs operate in a depletion mode (D-mode). The ladder-like NWs also give higher carrier concentrations than conventional single nanowires. Finite-difference time-domain (FDTD) simulations have been performed on the ladder-like NWs and the results reveal a great enhancement of light absorption with both transverse-electric (TE) and transverse-magnetic (TM) polarization modes, which is in good agreement with the experimental results.
Tsinghua University Press
Bo Liang,Hongtao Huang,Zhe Liu,Gui Chen,Gang Yu,Tao Luo,Lei Liao,Di Chen,Guozhen Shen, Ladder-like metal oxide nanowires: Synthesis, electrical transport, and enhanced light absorption properties. NanoRes.2014, 7(2): 272–283