Blinking suppression of single quantum dots in agarose gel

Journal Article · Mon Jan 04 00:00:00 EST 2010 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3280386· OSTI ID:21347231

Ko, H C ^[1]; Yuan, C T; Tang, Jau ^[2]; Lin, S H ^[3]

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1. Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 10617, Taiwan and Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
2. Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China)
3. Institute of Applied Chemistry, National Chiao-Tung University, Hsinchu 30010, Taiwan (China)

Fluorescence blinking is commonly observed in single molecule/particle spectroscopy, but it is an undesirable feature in many applications. We demonstrated that single CdSe/ZnS quantum dots in agarose gel exhibited suppressed blinking behavior. In addition, the long-time exponential bending tail of the power-law blinking statistics was found to be influenced by agarose gel concentration. We suggest that electron transfer from the light state to the dark state might be blocked due to electrostatic surrounding of gel with inherent negatively charged fibers.

• OSTI ID: 21347231
• Journal Information: Applied Physics Letters, Vol. 96, Issue 1; Other Information: DOI: 10.1063/1.3280386; (c) 2010 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CADMIUM SELENIDES
CHARGE EXCHANGE
ELECTRON TRANSFER
FLUORESCENCE
GELS
QUANTUM DOTS
SEMICONDUCTOR MATERIALS
SPECTROSCOPY
ZINC SULFIDES
CADMIUM COMPOUNDS
CHALCOGENIDES
COLLOIDS
DISPERSIONS
EMISSION
INORGANIC PHOSPHORS
LUMINESCENCE
MATERIALS
NANOSTRUCTURES
PHOSPHORS
PHOTON EMISSION
SELENIDES
SELENIUM COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
ZINC COMPOUNDS