Web Release Date: March 14,
Ultra Narrow PbS Nanorods with Intense Fluorescence
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International Center for Young Scientists, Nanoscale Materials Center, and Supermolecules Group, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan, and Department of Materials Engineering and the Ilse Katz Institute for Meso and Nanoscale Science and Technology, Ben-Gurion University, Beer Sheva, Israel 84105
Received December 13, 2007
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.
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