Figure 3.

EDS spectra for InNx cone (black) and InN nanowires (red), respectively. A relatively lower indium signal in InNx microcones is probably due to nonuniform radial distribution of In and N in the micron-size cone with more N expected from core surface attachment of N in vapor. Due to the short penetration of electron beam used for EDS, the surface signals may be emphasized when compared to that of the inner part of the cone

Xu et al. Nanoscale Research Letters 2009 5:7-13   doi:10.1007/s11671-009-9434-3