title: Semiconductor quantum dot-inorganic nanotube hybrids.
abstract: A synthetic route for preparation of inorganic WS(2) nanotube (INT)-colloidal semiconductor quantum dot (QD) hybrid structures is developed, and transient carrier dynamics on these hybrids are studied via transient photoluminescence spectroscopy utilizing several different types of QDs. Measurements reveal efficient resonant energy transfer from the QDs to the INT upon photoexcitation, provided that the QD emission is at a higher energy than the INT direct gap. Charge transfer in the hybrid system, characterized using QDs with band gaps below the INT direct gap, is found to be absent. This is attributed to the presence of an organic barrier layer due to the relatively long-chain organic ligands of the QDs under study. This system, analogous to carbon nanotube-QD hybrids, holds potential for a variety of applications, including photovoltaics, luminescence tagging and optoelectronics.
authors.affiliation: Dept. of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Ronen
authors.initials: R
authors.lastname: Kreizman
authors.forename: Osip
authors.initials: O
authors.lastname: Schwartz
authors.forename: Zvicka
authors.initials: Z
authors.lastname: Deutsch
authors.forename: Stella
authors.initials: S
authors.lastname: Itzhakov
authors.forename: Alla
authors.initials: A
authors.lastname: Zak
authors.forename: Sidney R
authors.initials: SR
authors.lastname: Cohen
authors.forename: Reshef
authors.initials: R
authors.lastname: Tenne
authors.forename: Dan
authors.initials: D
authors.lastname: Oron
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D013440:Sulfides / Q000737:chemistry; D013455:Sulfur / Q000737:chemistry*; D013499:Surface Properties; D014414:Tungsten / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D013440:Sulfides; D017967:Zinc Compounds; C034939:cadmium sulfide; D013455:Sulfur; C058667:cadmium selenide; C031238:zinc sulfide; D014414:Tungsten