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XPS survey spectra of epoxy resin surface: (a) uncoated and (b) TESPA SAM-coated. X-ray source is monochromated Al Kα ray. Testing area is 800 × 2,000 μm. Takeoff angle is 45°. The pressure in the preparation chamber is less than 10-7 Torr and less than 4 × 10-10 Torr in the analysis chamber.
