Current–voltage characteristics and visible-Raman spectrum of N2-UNCD nanorods. The current–voltage characteristics, which are obtained using Hall measurements with the measuring probes directly in contact with the top of the nanorods (inset a), reveal that the N2-UNCD nanorods possess good electrical conductivity of 275 Ω·cm − 1. Inset (b) shows the visible Raman spectrum of the N2-UNCD nanorods. d, diamond; g, graphite.
Sankaran et al. Nanoscale Research Letters 2012 7:522 doi:10.1186/1556-276X-7-522