2009 Annual Report Vol.37 - 中研院物理研究所 - Academia Sinica

developed a direct 3D reconstruction method to specifically treat data with only a
limited number of projections. It will be very useful for radiation-sensitive samples.
All these methods could be also applied to reconstruct 3D objects by using
cryo-electron microscopy.
The method was demonstrated by carrying out a quantitative 3D imaging of a
heat-treated GaN particle with each voxel corresponding to 17 × 17 × 17 nm 3 . We
observed the platelet structure of GaN and the formation of small islands on the
surface of the platelets, and successfully captured the internal GaN-Ga2O3 core shell
structure in three dimensions.
Fig.1. Schematic layout of the 3D x-ray diffraction microscope,
combining ab initio phase recovery with tomographic image
reconstruction.
Principal Investigators
Jason, Chia-Seng Chang
Research Fellow
Tel : 886-2-2789-6722 / jasonc@sinica.edu.tw
Ph.D., Arizona State University, USA
Research Interest: Surface physics and chemistry; Principles of atomic manipulation;
Quantum effects in low-dimensional systems; Nanostructure sciences, and
Development of SPM.
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