Speaker
Description
We investigated the thermal and structural behaviour of the phospholipid 1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine (SOPC) in the presence of amide-functionalized single-walled carbon nanotubes (af-SWCNTs) using differential scanning calorimetry (DSC) and the surface photo-charge effect (SPCE) 1. Our study focused on the formation of the cooperative unit (CU), which is the basic structural element of the amide-functionalized bionanocomposite across the gel-to-liquid crystal (LC) phase transition, as a function of af-SWCNT concentration. We identified an intermediate state between the gel and LC phases, shaped by steric, van der Waals, and hydrogen bonding interactions. This state was characterized by van’t Hoff (VH) enthalpy, reflecting the cooperativity of the phase transition 2. By analyzing the asymmetry of the DSC endothermic peak and comparing calorimetric and VH enthalpies, we quantified the contribution of VH enthalpy to CU formation.
ACKNOWLEDGMENTS: This work was supported by the project PVU – 58/12.12.2024 /BG-RRP-2.017-0041-C01/ “Development of photonic sensor effects at the interface solid surface/bionanocomposite for detection and control of biogenic impacts” (PhotonSensorEffect) in implementation of an investment under C2.I2: “Increasing the innovation capacity of the Bulgarian Academy of Sciences in the field of green and digital technologies”. This publication has been created with the financial support of the European Union – NextGenerationEU. The sole responsibility for the content of the document lies with ISSP-BAS and under no circumstances can it be assumed that this document reflects the official position of the European Union and MRS-BAS.
References
1 V.I. Pustovoit, et al., Solid State Comm 72, 613 (1989).
2 M.H. Chiu et al., J Pharm Bioallied Sci. 3, 39 (2011).
