本文將對低掠角小角度X光散射的基本原理及其在高分子薄膜奈米結構解析之應用做一簡單介紹，並講解如何解析低掠角小角度X光散射的特徵圖與薄膜奈米結構之關係。最後列舉幾個低掠角小角度X光散射應用在高分子材料薄膜微結構上的實例研究，如：雙親性嵌段共聚微胞單層薄膜及除潤現象誘導非對稱型嵌段共聚物薄膜之多層級結構。

This article provides an introduction on the fundamentals of probing nano-structured surfaces of polymers with grazing incidence small angle X-ray scattering (GISAXS). Next, we discuss how to interpret and analyze 2D GISAXS pattern s and 1D profiles related to different nanostructures on surface and interface. Finally, few examples, which include destabilized thin films of an asymmetric block copolymer and monolayers of amphiphilic diblock copolymer micelles, are presented to demonstrate the application of GISAXS in the studies of polymer nano-structured surfaces.