Colloidal semiconductor nanorods (SC NRs) have been widely studied as potential building blocks for optoelectronic devices due to their strong optical anisotropy, tunable band-edge emission and nearunity photoluminescence (PL) quantum yield. These onedimensional nanocrystals exhibit stronger quantum confinement perpendicular to their long axes, which modifies the spatial distribution of photoexcited charge carries, giving rise to pronounced optical anisotropy in the form of linearly polarized absorption and emission of light (see Figure ). . Recent advances in nanoparticle synthesis have further enabled precise control of size, composition, and morphology, affording tailored spectral-and angle-dependent absorption and emission patterns in these and related nanocrystalline materials. The unique optical properties of individual NRs can be exploited at the macroscopic scale by assembling large populations of NRs into ordered superstructures. For instance, several studies have highlighted the promise of aligned anisotropic luminophores for application in luminescent solar concentrators and liquid crystal displays . The ensemble properties of NR assemblies are determined not only by the individual NR building blocks, but also by their meso-and macroscale ordering, as well as more complex inter-particle coupling effects. Numerous techniques for collective alignment of NRs have been explored, and they can be broadly classified into two approaches: (1) taking advantage of the self-assembly of colloidal NRs into superlattices and (2) applying external stimuli such as mechanical rubbing , AC electric fields or magnetic fields to promote orientation along a preferred axis.