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Physical Society ColloquiumInterview for Faculty Position3D Diffraction Microscopy and Its Applications in Nanoscience and Structural BiologyJohn MiaoStanford Linear Accelerator LaboratoryWhen a coherent diffraction pattern is sampled at a spacing sufficiently finer than the Bragg peak frequency (i.e. the inverse of the sample size), the phase information is in principle embedded inside the diffraction pattern, and can be directly retrieved by using an iterative process. In combination of this oversampling phasing method with either coherent X-rays or electrons, a novel form of diffraction microscopy has recently been developed to image nano-crystals, nanostructured materials and biological samples. In this talk, I will present the principle of the oversampling method, discuss the first experimental demonstration of this microscope, and illustrate some applications in nanoscience and biology.
Tuesday, February 10th 2004, 10:30
Ernest Rutherford Physics Building, R.E. Bell Conference Room (room 103) |