Ryugu IOM sample C0107-IOM residue_16-A. Zoom-in on a region including the organic nanoparticle assemblage identified in situ in Fig. 5. These organic nanoparticles were both analyzed with the O-PTIR technique using a mIRage^® and with AFM-IR. (a) Projected IR map integrating the CH_X stretching mode absorption band over the 3050–2750 cm⁻¹ range from the mIRage^® analysis (lateral resolution of 500 nm). (b) Large-scale topographic map of the grain and the location of the analyses by O-PTIR (red box corresponding to the map in (a)) and AFM-IR (white box corresponding to the maps shown in (d). (c) Spectra from the hyperspectral mapping over the organic nanoparticle region using O-PTIR. Individual spectra on the organic nanoparticles (in red) show a higher absorption in the CHX region (average spectra in bold curve). The blue spectra are from the neighboring areas and show lower CH_X absorption (average spectrum in bold blue curve). (d) RGB image of the region including the nanoglobule (C=O at 1720 cm⁻¹ in red, C=C at 1600 cm⁻¹ in green, CH_X 1460 cm⁻¹ minus 1520 cm⁻¹ in blue). The white line shows the location of individual AFM-IR spectra taken across the nanoglobule assemblage. The colored dots (S₁ to S₄) correspond to average spectra taken on each side (S₁ and S₄ in blue) and on the organic nanoparticles (S₂ and S₃ in red). (e) Intensity ratios of frequencies corresponding to CH_X/C=C (1460/1600) and C=O/C=C (1700/1600) along the white line shown in (d). The location of the S₁ to S₄ spectra is recalled on the left axis. (f) Average AFM-IR spectra on each side (blue, S₁ and S₄) and on the organic nanoparticles (red, S₂ and S₃).