Carbon | Thermo Fisher Scientific - CN

来自 : www.thermofisher.com/cn/zh/hom 发布时间：2021-03-24

Maximizes ability to distinguish between sp2 and sp3 carbon. C KLL acquisition conditions: Pass energy=100eV, step size=0.5eV, 100 scans, scan range binding energy=1190eV-1246eV. Charge neutralization may be required, especially for functionalized graphene/graphite or diamond. Interpretation of XPS Spectra The C1s spectrum from a sample with high concentration of sp2 carbon will have a broad, asymmetric tail towards higher binding energy. One or more satellite features, several eV from the main C1s peak, will also be observed in samples with high sp2 concentration. For high concentrations of sp3-bonded carbon, the C1s peak will have a more symmetric shape and will also be slightly shifted to higher binding energy.

Functionalized graphene will have a complex C1s spectrum, containing sp2 and sp3 components. Fit the sp2 component with asymmetric shape (preferably derived from a real graphite or graphene sample), including symmetric loss peaks where necessary. The sp3 carbon and functionalized carbon should be fitted with symmetric peak shapes. The sp3 carbon peak should be 1eV to the higher binding energy side of the sp2 component.
Carbon-based compounds are the basis for all living systems and comprise the structure of fossil fuels in the form of hydrocarbons.Carbon-based compounds are the basis for all living systems and comprise the structure of fossil fuels in the form of hydrocarbons.Carbon