title: Ultra narrow PbS nanorods with intense fluorescence.
abstract: We report on the narrowest "free" quantum rods of PbS with 1.7 nm diameter produced in a single step under bench-top reaction conditions. The nanorods exhibit molecule-like discrete narrow optical behavior with high fluorescence quantum yield. We propose a new macroscopic vortex assembly formation by simple spin casting route. Interestingly, the pattern generates fluorescence along its line from the nanorod domains. The ultra narrow nanorods with strong discrete fluorescence and robust stability could be useful in biological labeling, fluorescence resonance energy transfer, and optoelectronics applications, as well as to verify the theories in the very strong confinement regime.
authors.affiliation: International Center for Young Scientists, Nanoscale Materials Center, and Supermolecules Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan. ACHARYA.Somobrata@nims.go.jp
authors.forename: Somobrata
authors.initials: S
authors.lastname: Acharya
authors.forename: Ujjal K
authors.initials: UK
authors.lastname: Gautam
authors.forename: Toshio
authors.initials: T
authors.lastname: Sasaki
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando
authors.forename: Yuval
authors.initials: Y
authors.lastname: Golan
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ariga