A novel approach for structure analysis of two-dimensional membrane protein crystals using x-ray powder diffraction data

角度敏感粉末衍射层析成像中的视差

Parallax in angular sensitive powder diffraction tomography

本文研究角度敏感粉末衍射层析成像中的几何视差影响，发现其与其他偏移贡献可加、可直接校正，且在完整360°旋转扫描中不影响角信息重建。

Generation of Diffraction-Free Optical Beams Using Wrinkled Membranes

We report the first demonstration of wrinkled membranes as a kind of optical focusing devices, which are low cost, light weight and flexible. Our device consists of concentric wrinkle rings on a gold-PDMS bilayer membrane, which converts collimated illuminations to diffraction-free focused beams. Beam diameters of 300-400 μm have been observed in the visible range. By comparing the theoretically calculated and experimentally measured focal spot profiles, we predict a focal spot size as small as around 50 μm if fabrication eccentricity can be eliminated.

Neutral Helium Atom Diffraction from a Micron Scale Periodic Structure: Photonic Crystal Membrane Characterization

Surface scattering of neutral helium beams created by supersonic expansion is an established technique for measuring structural and dynamical properties of surfaces on the atomic scale. Helium beams have also been used in Fraunhofer and Fresnel diffraction experiments. Due to the short wavelength of the atom beams of typically 0.1nm or less, Fraunhofer diffraction experiments in transmission have so far been limited to grating structures with a period (pitch) of up to 200nm. However, larger periods are of interest for several applications, for example for the characterization of photonic cryst…

结合光学衍射层析成像与成像流式细胞术以表征活红细胞的形态、血红蛋白含量和膜变形能力

Combining optical diffraction tomography with imaging flow cytometry for characterizing morphology, hemoglobin content, and membrane deformability of live red blood cells

本文改进光学衍射层析成像与成像流式细胞术中红细胞旋转角估计，实现健康及戊二醛处理红细胞的三维重建，可定量形态、血红蛋白和膜波动变化。

聚酰亚胺膜上纳米结构的高效多级相位透镜

High-Efficiency Multilevel Phase Lenses with Nanostructures on Polyimide Membranes

该研究提出基于光刻和聚酰亚胺浇铸的纳米制造技术，制备多级相位菲涅耳波带片，16级相位透镜聚焦效率达91.6%，较传统振幅型提升9.5倍，适用于轻量化柔性光学应用。