Intrinsic quality of InSb NWs grown in template pores

InSb NWs were grown in two different types of templates: nanoporous anodic aluminum oxide (AAO) and polycarbonate. In this talk, the difference in the structural quality of the as-grown NWs in both cases will be presented. NWs grown in commercially available AAO templates were found to have rough surfaces attributed to non-uniform pores in the membrane. On the other hand, InSb NWs grown in the polycarbonate track-etched membranes showed very uniformly, smooth surfaces. Both types of NWs were characterized by Raman spectroscopy, which showed different Raman spectrum. The strong defect related peak in the polycarbonate-grown InSb NWs attest to the fact that they are possibly amorphous. Temperature-dependent measurements on these NWs also show very different behavior. The NWs grown in the polycarbonate membrane show Mott Variable Range Hopping in the low-temperature regime and Arrhenius (thermally activated) transport in the high-temperature regime. This is contrary to the AAO template grown InSb NWs which shows thermally activated conduction mechanism in both low and high-temperature regime.