Nanophotonics Centre, University of Cambridge, JJ Thomson Ave, Cambridge, CB3 0HE, UK.
Adv Mater. 2012 Nov 20;24(44):OP305-8. doi: 10.1002/adma.201202169. Epub 2012 Aug 23.
Hyperspectral goniometry reveals anisotropic scattering which dominates the visual appearance of self-assembled polymer opals. The technique allows reconstruction of the reciprocal-space of nanostructures, and indicates that chain defects formed during shear-ordering are responsible for the anisotropy in these samples. Enhanced scattering with improving order is shown to arise from increased effective refractive index contrast, while broadband background scatter is suppressed by absorptive dopants.
高光谱小角反射技术揭示了各向异性散射，这主导了自组装聚合物蛋白石的视觉外观。该技术允许重建纳米结构的倒空间，并表明在剪切有序化过程中形成的链缺陷是这些样品各向异性的原因。随着有序度的提高，增强的散射是由于有效折射率对比度的增加而产生的，而宽带背景散射则被吸收掺杂剂抑制。
