The first hypothesis assumes a crucial role of intermolecular interactions (electrostatic attraction and hydrogen bonds formation, Figure ) between AzoGly and CNFs. The observed 6-10 cm -1 coherent spectral shifts of crucial IR bands corroborate this hypothesis. A peak appearing at 2924 cm -1 for AzoGly (-𝑁 -𝐻 stretching of -𝑁𝐻 3 + end group, grey highlight) is shifted to 2918 cm -1 in AzoGly-Au-2-CNFs. Simultaneously, a similar change occurs in the position of the symmetrical vibration band of -𝐶𝑂𝑂 -group of CNFs (vivid green highlight). The original peak appearing at 1429 cm -1 in Au-2-CNFs shifts to 1419 cm -1 in the final material.