Supporting data for "Two-dimensional Condensation of Interfacial Hydrocarbons"

Résumé fourni par la source

This dataset contains the raw experimental data supporting the manuscript on interfacial condensation of adventitious carbon into freestanding carbon nanomembranes at confined metal interfaces. FTIR_spectrum/: Time- and temperature-resolved attenuated total reflectance Fourier-transform infrared (ATR-FTIR) spectra used to track the CO cycle intermediates (C–O, C=O, COO) across metal interfaces, self-assembled monolayer (SAM) chemistries, and annealing conditions. Metric_correlation/: Raman spectra (D-band, G-band), photoluminescence spectra, and current–voltage (I–V) sweeps of stacked field-effect transistor devices across four metal interfaces (Au, Cu, Mo, W) at multiple annealing temperatures, together with the derived correlation analysis (r_lv,532 versus I_D/I_G, G-band position, and G/G0) and Raman mapping data across Au film thicknesses. XPS/: X-ray photoelectron spectra (C 1s, O 1s, S 2p, Au 4f, Mo 3d) including depth-resolved profiles, used to characterise interfacial chemical bonding and oxidation states. AFM/: Kelvin probe force microscopy (KPFM) work function and topography (Z height) maps used to characterise the electronic and structural asymmetry of the carbon membrane. Mass_spectroscopy/: In-situ quadrupole mass spectrometry (gas evolution: H2, H2O, CO, CO2) and ICP-QQQ elemental analysis data used to track reaction products during interfacial condensation. OCV/: Open-circuit voltage and electrochemical impedance data used to confirm self-assembled monolayer formation and stability. Images/SEM/: Scanning electron microscopy images of annealed carbon membranes. Images/TEMs/: Transmission electron microscopy images and elemental mapping (EDS) of carbon membranes formed with Fe-oleate, GeCh (GeS, GeSe, GeTe) precursors, and on bare Au. For the Mo and W substrates, cross-sectional imaging shows no discrete carbon interlayer, consistent with carbon dissolving into and precipitating out of the bulk metal rather than forming a localised interfacial film.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.