Lycii fructus, Lycii folium, Ovariectomized rat, Cholesterol, Liver
Experiment of Usefulness of IWFR Analysis for High Voltage HRTEM Images with a Series of Defocus Steps Obtained from a Relatively Thick Crystal
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In this paper we have examined the usefulness of IWFR (the iterative wave-function reconstruction) analysis for through- focal series of high-resolution images for a relative thick crystal. In the work we employed JEOL ARM 1300S, and observed the high-resolution images for a Si crystal at the two orientations of [01-1] and [11-2] having 30 nm and 35 nm thickness respectively. As a result of applying IWFR method on the images we found out that even for a thick crystal by the method we can retrieve the exit-surface wave function. However because of the strong dynamical scattering effect, the image pattern of the function reflects only qualitatively the atomic column structure of the crystal examined. Nevertheless it is no doubt that the pattern would give important clue for the crystal structure.
Abstract
In this paper we have examined the usefulness of IWFR (the iterative wave-function reconstruction) analysis for through- focal series of high-resolution images for a relative thick crystal. In the work we employed JEOL ARM 1300S, and observed the high-resolution images for a Si crystal at the two orientations of [01-1] and [11-2] having 30 nm and 35 nm thickness respectively. As a result of applying IWFR method on the images we found out that even for a thick crystal by the method we can retrieve the exit-surface wave function. However because of the strong dynamical scattering effect, the image pattern of the function reflects only qualitatively the atomic column structure of the crystal examined. Nevertheless it is no doubt that the pattern would give important clue for the crystal structure.
참고문헌 (12)
- Allen LJ, "Exit wave reconstruction at atomic resolution", Ultramicroscopy, 100, pp.91~104 (2004)
- Allen LJ, "Electron microscope Cs correction using iterative wave-function reconstruction", Microscopy and Analysis, 52, pp.5~7 (2006)
- Chang LY, "Comparisons of linear and nonlinear image restoration", Microsc Microanal, 12, pp.469~475 (2006)
- Coene W, "Phase retrieval through focus variation for ultra-resolution in field-emission transmission electron microscopy", Phys Rev Lett, 69, pp.3743~3746 (1992)
- Coene WMJ, "Maximumlikelihood method for focus-variation image reconstruction in high resolution transmission microscopy", Ultramicroscopy, 64, pp.109~135 (1996)
- 김황수, "HRTEM 영상 분석에 대한 IWFR 방법의 고찰 및 응용", 한국현미경학회지, 38(1), pp.63~72 (2008), 한국현미경학회
- Kim HS, "Effects of higher-order Laue zone reflections on HRTEM images for illumination along an off-zone axis of a crystal", Korean J Electron Microscopy, 37(4), pp.259~269 (2007)
- 김진규, "투과전자현미경을 이용한 SmZn0.67Sb2의 3차원적 구조 분석", 한국전자현미경학회지, 34(4), pp.255~264 (2004), 한국현미경학회
- Kisielowski C, "Imaging columns of the light elements carbon, nitrogen and oxygen with sub angstrom resolution", Ultramicroscopy, 89, pp.243~263 (2001)
- Spence JCH, "Experimental high resolution electron microscopy" (1981), Oxford Univ Press
- Tillmann K, "Spherical aberration correction in tandem with exit-plane wave function reconstruction: Interlocking tools for the atomic scale imaging of lattice defects in GaAs", Micros Microanal, 10, pp.1851~198 (2004)
- Voelkl E, "Improving image quality and reducing drift problem via automated data acquisition and averaging in a Cs-corrected TEM", Microscopy Today, 16(6), pp.36~38 (2008)