Department of Nanochemistry on Instagram: "Bond vibration is the stretching and bending of chemical bonds, acting like tiny springs, which absorb specific infrared (IR) light frequencies. FTIR (Fourier-Transform Infrared) spectroscopy measures these absorptions, creating a unique molecular "fingerprint" (spectrum) with peaks at wavelengths corresponding to these vibrational modes (stretching, bending, etc.) for different functional groups, allowing identification of substances. 🎉🔬"