title: Highly emissive nano rod-in-rod heterostructures with strong linear polarization.
abstract: We report the synthesis of CdSe/CdS rod in rod core/shell heterostructures. These rods, synthesized using a seeded-growth approach, show narrow distributions of rod diameters and lengths and exhibit high emission quantum efficiencies and highly polarized emission. The degree of polarization is controlled by the inner core rod dimensions, and it is equal or up to 1.5 times higher than the polarization of equivalent sphere in rod systems. Using the method of photoselection we measure the polarization anisotropy at different excitation wavelengths and study the interplay between electronic contribution and dielectric effects in determining the absorption and emission polarization.
authors.affiliation: Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University , Jerusalem 91904, Israel.
authors.forename: Amit
authors.initials: A
authors.lastname: Sitt
authors.forename: Asaf
authors.initials: A
authors.lastname: Salant
authors.forename: Gabi
authors.initials: G
authors.lastname: Menagen
authors.forename: Uri
authors.initials: U
authors.lastname: Banin
mesh_terms: D000042:Absorption; D019187:Cadmium Compounds / Q000737:chemistry; D046529:Microscopy, Electron, Transmission / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D013050:Spectrometry, Fluorescence / Q000379:methods; D013440:Sulfides / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C058667:cadmium selenide