Akademik Veri Yönetim Sistemi
Surfaces and Interfaces, cilt.85, 2026 (SCI-Expanded, Scopus)
This study comparatively investigates the structural changes and exfoliation behaviour of hexagonal boron nitride (hBN) by two methods: oxidation and a modification process involving the surfactant sodium dodecyl sulphate (SDS). The thermal oxidation of hBN at 1000°C in an air atmosphere introduces oxygen-containing functional groups (B-O and -OH) into the hBN lattice, as confirmed by FTIR spectra showing new bands at around 1195 and 3200 cm⁻¹. Oxygen functional groups reduced the interlayer van der Waals interactions, leading to enhancing the delamination process. Using SDS in an isopropyl alcohol-water suspension facilitated further exfoliation through electrostatic repulsion and surface stabilization. XRD analyzes revealed a decrease in the (002) peak intensity, indicating an increase in interlayer spacing. Raman spectra exhibited broadened full-width at half maximum (FWHM) values reflecting structural disorder and decreased stacking order. UV-Vis spectra exhibited enhanced absorption in the UV region, attributed to defect-induced electronic transitions. The results indicate that the use of SDS after oxidation effectively promotes exfoliation while preserving the basic hexagonal structure of hBN, resulting in improved dispersibility and enhanced functional surface activity.