课程名称︰高分子表面分析专论(Special topic in plymer and surface analysis) 课程性质︰选修 课程教师︰刘定宇 开课学院：工学院 开课系所︰高分所 考试日期（年月日）︰Apr. 15, 2013 考试时限（分钟）：120 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1. (a) Describe the mechanism of the production of a LMM Auger electron and X-ray fluorescence (XRF) photon in Auger electron spectroscopy (AES)? (b) Describe the mechanism of emitted (1s) electron in X-ray photoelectron spectroscopy (XPS/ESCA) and how it is possible to distinguish between XPS and Auger electron peaks? (5 points each) 2. An XPS electron was found to have a kinetic energy of 1073.5 eV when Mg K alpha source was employed (hv - 1253.6 eV). The electron spectrometer had a work function of 14.7 eV. (10 points) (1) Calculate the binding energy for the emitted election in the source (2) If the signal was from a S(2s) electron, was the analyte S2-. S0 SO320 or S042-? see Fig. 1 (3) What would the kinetic energy have been if an Al K alpha source had been used (hv = 1486.6 eV)? (4) If the emitted electron with the Mg K alpha source had been Auger electron, what would its kinetic energy be with Al K alpha source? 3. The following figure (Fig. 2) shows the chemical shifts in Carbon 1s X-ray photoelectron spectrum for ethyl trifluoroacetate, please indicate and explain which functional group in ethyl trifluoroacetate belong to the four peaks, respectively? (10 points) 4. How does static SIMS instrumentally differ from dynamic SIMS? how does the information obtain differ? What is imaging SIMS? What type of information is obtained with imaging SIMS? (10 points) 5. (a) What are the strengths and disadvantages of SIMS compared to XPS/ESCA/AES? (5 points) (b) What is crater side-wall effect in SIMS? (5 points) 6. (a) Name 3 possible sources of signals with SEM.(5 points) Differentiate between elastic and inelastic scattering of electrons. (b) How contrast change (bright/dark) in the backscattered electrons (BE) and secondary electrons (SE) when atomic number increases, respectively (5 points) 7. Describe how wavelength dispersive spectrometer (WDS) works and what is Rowland circle. (10 points) 8. Describe how energy dispersive spectrometer (EDS) works and what are Fe K alpha and Fe L beta X-ray? (10 points) 9. Explain: (1) mass-thickness and diffraction contrast (2) bright field and dark field (3) Which diffraction pattern in the following figure (Fig.3) is amorphous polymer? (10 points) 10. Describe the mechanism of energy loss electron and try to explain the region(I, II, III) in the following electron elergy loss spectroscopy(EELS) (Fig. 4). (10 points) ============ total 100 points, 图後补。 -- 十年生死两茫茫　不思量　自难忘　千里孤坟　无处话凄凉 纵使相逢应不识　尘满面 鬓如霜 夜来幽梦忽还乡　小轩窗　正梳妆　相顾无言　唯有泪千行 料得年年肠断处 明月夜 短松岗 --

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