Fourier Transfrom Infrared Spectromety UiO傅里叶变换红外光谱 UIO.pptVIP

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 4. Isotopic substitution 1. Background Zinc Oxide Infrared Radiation Molecular processes FTIR / Spectrometry 2. Measurements 3. Hydrogen in ZnO 4. Isotopic substitution 5. Results 6. Conclusion Isotopic substitution – H and D Harmonic oscillator approximation Ratio between O-H and O-D frequency ω = angular frequency, k = force constant, μ = reduced mass and M,m = mass O-D modes expected at 2300 ? 2600 cm?1 5. Results 1. Background Zinc Oxide Infrared Radiation Molecular processes FTIR / Spectrometry 2. Measurements 3. Hydrogen in ZnO 4. Isotopic substitution 5. Results 6. Conclusion DTGS-detector measurements IR parallel to c-axis of the crystal As-grown samples Ion-implantation / SIMS O-face Zn-face H-implantation: E = 1.1 MeV D-implantation: E = 1.4 MeV Dose: 2 x 1016 cm-2 on both sides InSb-detector measurements IR parallel to c-axis As-grown samples Annealed InSb-detector measurements IR parallel to c-axis Hydrogen implanted Annealed Polished InSb-detector measurements IR parallel to c-axis Deuterium implanted Annealed Polished InSb-detector measurements IR perpendicular to c-axis InSb-detector measurements k perpendicular to c-axis measurements As-grown and annealed InSb-detector measurements k perpendicular to c-axis measurements Hydrogen implanted and annealed / polished InSb-detector measurements k perpendicular to c-axis measurements Deuterium implanted and annealed / polished Isotopic shifts Isotopic shifts Quanti?cation of the hydrogen content... Integrated absorbance (IA) Absorption strength per species D-dose: (1.46 ± 0.54) x 1017 cm-2 IA (2644 peak): 0.233 cm -2 ?D = (1.72 ± 0.63) x 10-18 cm Quanti?cation of the hydrogen content... Similar treatment on hydrogen is not easy A conversion factor is needed: ?D x C = ?H From other oxides C = 1.31 (LiNbO3), 1.88 (TiO2) Approximation CZnO ~ 1.595 ?H = (2.74 ± 1.01) x 10-18 cm Integrated absorbace of