The XPS data were acquired using a bespoke ultra-high vacuum system fitted with a Specs GmbH Focus 500 monochromated Al Ka X-ray source, Specs GmbH Phoibos 150 mm mean radius hemispherical analyser with 9-channeltron detection, and a Specs GmbH FG20 charge neutralising electron gun. Survey spectra were acquired over the binding energy range 1100e0 eV using a pass energy of 50 eV and high resolution scans were made over the C 1s,O 1s, S 2p and F 1s lines using a pass energy of 15 eV. In each case,the analysiswas an area-average over a region approximately 2mm in diameter on the sample surface. The monochromator X-ray
source was operated at a reduced power of 12 kV 15 mA (180 W) compared to the manufacturer's recommended maximum of 15 kV 26.6 mA (400 W) to reduce the possibility of X-ray induced degradation during analysis. Note also that in this design of system, the X-ray source is remote from the sample by approximately 1 m and so there are no thermal- or Bremsstrahlung-induced degradation effects. Charge compensation was by a low energy (5 eV) electron flood, and spectra were charge corrected to the hydrocarbon CeC component of the C 1s peak at 285.0 eV. The energy scale of the instrument is calibrated according to ISO standard 15472, and the intensity scale is calibrated using an in-house method traceable to the UK National Physical Laboratory. The information depth in XPS analysis is normally taken as three times the effective electron attenuation length, typically 3e3.5 nm for the C 1s line in organic materials, and was therefore approximately 10 nm in the measurements reported here. Quantification data used in this paper were obtained from the high resolution data.
ข้อมูล XPS ที่ได้รับมาใช้ตามสูงสูญญากาศระบบพร้อมสเปค GmbH โฟกัส 500 monochromated Al Ka X-ray แหล่ง สเปค GmbH Phoibos 150 มม.หมายถึง รัศมีครึ่งวงกลมวิเคราะห์ตรวจจับ 9 channeltron และสเปค GmbH FG20 ค่า neutralising ปืนอิเล็กตรอน สำรวจสเปกตรัมได้รับมามากกว่าพลังงานยึดเหนี่ยวช่วง 1100e0 eV ใช้พลังงานผ่านการสูง และ 50 eV ความละเอียดทำการสแกนผ่าน C 1s, O 1s, S 2p และ F 1s บรรทัดโดยใช้พลังงานผ่านของ 15 eV ในแต่ละกรณี analysiswas เฉลี่ยพื้นที่เหนือเขตประมาณ 2 มม.เส้นผ่านศูนย์กลางบนพื้นผิวตัวอย่าง Monochromator X-raysource was operated at a reduced power of 12 kV 15 mA (180 W) compared to the manufacturer's recommended maximum of 15 kV 26.6 mA (400 W) to reduce the possibility of X-ray induced degradation during analysis. Note also that in this design of system, the X-ray source is remote from the sample by approximately 1 m and so there are no thermal- or Bremsstrahlung-induced degradation effects. Charge compensation was by a low energy (5 eV) electron flood, and spectra were charge corrected to the hydrocarbon CeC component of the C 1s peak at 285.0 eV. The energy scale of the instrument is calibrated according to ISO standard 15472, and the intensity scale is calibrated using an in-house method traceable to the UK National Physical Laboratory. The information depth in XPS analysis is normally taken as three times the effective electron attenuation length, typically 3e3.5 nm for the C 1s line in organic materials, and was therefore approximately 10 nm in the measurements reported here. Quantification data used in this paper were obtained from the high resolution data.
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