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Title Page
Contents
Abstract 9
Chapter I. Introduction 11
1. Glass and dynamic property 11
1.2. Debye-Stokes-Einstein (DSE) and Stokes-Einstein (SE) 14
1.3. Dynamic heterogeneity 15
1.4. Probe dependence experiment 18
Chapter II. Experimental 19
2.1. Home-built microscope setup 19
2.2. Sample preparation & probe 21
Chapter III. Analysis methods 23
3.1. ImFCM Data analysis 23
3.2. adjustment 26
3.3. Translational motion 28
Chapter IV. Results and discussion 30
4.1. Factors affecting experimental studies. 30
4.2. Measurement of dynamics 34
4.3. Comparison of rotational relaxation time 37
4.4. ACF time scale of polymer dynamics at Tg[이미지참조] 39
4.5. Debye-Stokes-Einstein breakdown magnitude in glass former system. 41
4.6. Magnitude of DSE breakdown correlation with β 53
4.7. Magnitude of DSE breakdown correlation with fragility 55
4.8. Temperature dependence of β 58
4.9. Comparison with other β theory 60
Chapter V. Conclusions 62
References 63
한글 초록 67
Figure 1. (a) Characteristic glass former dynamics fragility and (b) exponential β 13
Figure 2. (a) Comparison of the magnitude of DSE breakdown with the β at Tg for probes in...[이미지참조] 17
Figure 3. Schematic of the analysis method: imaging fluorescence correlation spectroscopy. 25
Figure 4. (a) Set PSF along with the binning position, (b) Emission wavelength after filter 27
Figure 5. The diffusion law. The number of pixel is 50 x 50 pixels. a slope of (DT)-1, where DT...[이미지참조] 29
Figure 6. (a) The value of DT varies according to the number of averaged ACFs and 95%...[이미지참조] 33
Figure 7. (a) Normalized translational autocorrelation decays of pPDI in PS for the indicated... 36
Figure 8. (a) Normalized rotational autocorrelation decays of pPDI in PS measured by... 38
Figure 9. (a) Dynamics of rotational and translational temperature dependence pPDI in host... 40
Figure 10. Chemical structures and molecular weights of probes molecule and host glass... 42
Figure 11. Dynamics of rotational and translational temperature dependence pPDI in host glass... 44
Figure 12. Dynamics of rotational and translational temperature dependence tbPDI in host glass... 45
Figure 13. Product value DTτc Debye-Stokes-Einstein breakdown at T/Tg. (a) pPDI (b) tbPDI[이미지참조] 46
Figure 14. β vs. magnitude of DSE breakdown measured by probe experiment. Rubrene and... 54
Figure 15. The magnitude of Debye-Stokes-Einstein breakdown at Tg vs fragility. Rubrene and...[이미지참조] 57
Figure 16. (a) Fragility(m) vs. β temperature dependence (b) Magnitude of DSE breakdown vs.... 59
Figure 17. Temperature dependence of stretching exponent β. 61
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