How to detect differences in material surface energy?

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How to detect differences in material surface energy? IGC is a highly sensitive technique for measuring surface energy and surface chemistry. Processed or modified carbon materials exhibit two types of surface differences: structural and energetic differences. The energy difference exists due to the different energy levels of various surface points, and the overall pattern of this difference can be described by an energy distribution function. The \"SEA Surface Energy Analyzer\" that utilizes this principle should be able to meet the research needs in this area. (Principle of IGC: Unlike traditional gas chromatography, the powder, fiber, or membrane to be analyzed is loaded into an empty column. Pulsed or continuous gas is injected into the column at a constant carrier gas flow rate; the retention behavior of the concentration before pulsing in the column is detected by a detector. A wide range of physicochemical properties of solid samples can be determined using different probe molecules. Most of these properties measured by IGC are derived from the retention volume VN. This measures the strength of the interaction between gas probe molecules and solid materials. All thermodynamic and kinetic parameters can be derived from the series of VN values measured. ）