Figure 6
From: Laser-induced Greenish-Blue Photoluminescence of Mesoporous Silicon Nanowires

ATR-FTIR spectra of the pristine (in solid black) and laser-modified (in solid red) mp-SiNWs.
Laser power was ~73 mW. The pristine and laser-modified mp-SiNWs were etched in 2% HF for 30 s, in dash black and dash red, respectively.