Thermo-optical determination of vapor pressures of TNT and RDX nanofilms

► We report the formation of continuous TNT & RDX nanofilms by spin coating. ► We use UV-absorbance spectroscopy to determine sublimation rates of explosives. ► Accurate vapor pressures of TNT & RDX in the nanometer scale are reported. ► Our reported parameters agree well with the mean value in literature. ► Our results expected to have a high impact on trace explosive detection.