Nygård K, Satapathy D K, Bunk O, Diaz A, Perret E, Buitenhuis J, Pfeiffer F, David C, van der Veen F
Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.
Opt Express. 2008 Dec 8;16(25):20522-9. doi: 10.1364/oe.16.020522.
We develop a novel method for structure determination of confined fluids using diffraction-grating-based x-ray interferometry.Within this approach, diffraction from a microfluidic array, which acts both as confinement and transmission diffraction grating, provides the reference wave, whereas the density modulations of the confined fluid, acting as a weak phase object, generate the object wave. The ensemble-averaged density profile of the fluid perpendicular to the confining channel is then unambiguously obtained from the interference between the reference and object waves by direct Fourier inversion.
我们开发了一种使用基于衍射光栅的X射线干涉测量法来确定受限流体结构的新方法。在这种方法中，微流体阵列的衍射既作为限制又作为透射衍射光栅，提供参考波，而受限流体的密度调制作为弱相位物体产生物波。然后，通过直接傅里叶反演，从参考波和物波之间的干涉中明确获得流体垂直于限制通道的系综平均密度分布。
