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Efficient Infrared‐Emitting PbS Quantum Dots Grown on DNA and Stable in Aqueous Solution and Blood Plasma
Author(s) -
Levina L.,
Sukhovatkin V.,
Musikhin S.,
Cauchi S.,
Nisman R.,
BazettJones D. P.,
Sargent E. H.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200401197
Subject(s) - quantum dot , materials science , aqueous solution , photoluminescence , nanocrystal , plasma , nanoparticle , infrared , dna , nanotechnology , luminescence , optoelectronics , photochemistry , optics , chemistry , physics , biochemistry , quantum mechanics
The synthesis of efficient photoluminescent quantum dots via growth on a DNA template is reported for the first time. The nanoparticles emit in the second biological window of 1050–1200 nm with quantum efficiencies of 11.5 ± 1 % in aqueous solution, and are stable for over a week in blood plasma at 37 °C. The Figure shows an energy‐filtered TEM image of PbS nanocrystals (Pb: orange; P in DNA: green).