Fig. 3

Topographical, Nano-FTIR images, and spectra of lunar sample 15445.307. (a) Topographical image. (b) Nano-FTIR amplitude and phase spectra at locations (red[R] and blue[B] squares) in the image (a). (c) Amplitude map at 932 cm⁻¹. (d) Phase map at 932 cm⁻¹. (e) and (f), same as (c) and (d) but at 1050 cm⁻¹. Each image corresponds to a spatial scale of 1000 nm × 1000 nm.