Figure 1.

a SEM image of the Se nanowires. b Raman spectrum of the Se nanowires corresponding to trigonal Se structure. c PL spectrum of the Se nanowires showing 1.76 eV (706 nm) band-gap of trigonal Se. d SEM of single Se nanowire two-terminal device

Liao et al. Nanoscale Research Letters 2010 5:926-929   doi:10.1007/s11671-010-9585-2