title: Macroscale lateral alignment of semiconductor nanorods into freestanding thin films.
abstract: This Communication reports that needle-like supercrystalline colloidal particles can be synthesized through anisotropy-driven self-assembly of 1,12-dodecanediamine-functionalized CdSe/CdS core/shell nanorods. The resulting superparticles exhibit both 1D lamellar and 2D hexagonal supercrystalline orders along directions parallel and perpendicular to the long axis of constituent nanorods, respectively. Our results show that the needle-like superparticles can be unidirectionally aligned through capillary forces on a patterned solid surface and further transferred into macroscopic, uniform, freestanding polymer films, which exhibit strong linear polarized PL with an enhanced polarization ratio, and are useful as energy down-conversion phosphors in polarized LEDs.
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, Florida 32611, USA.
authors.forename: Tie
authors.initials: T
authors.lastname: Wang
authors.forename: Xirui
authors.initials: X
authors.lastname: Wang
authors.forename: Derek
authors.initials: D
authors.lastname: LaMontagne
authors.forename: Zhongwu
authors.initials: Z
authors.lastname: Wang
authors.forename: Y Charles
authors.initials: YC
authors.lastname: Cao
mesh_terms: D016880:Anisotropy; D002104:Cadmium / Q000737:chemistry; D019187:Cadmium Compounds / Q000737:chemistry; D003460:Crystallization; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes; D010316:Particle Size; D012643:Selenium / Q000737:chemistry; D012666:Semiconductors; D013440:Sulfides / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; D002104:Cadmium; C034939:cadmium sulfide; D012643:Selenium