Journal
ANALYST
Volume 139, Issue 24, Pages 6435-6439Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4an01456a
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Funding
- 973 Program [2013CB733700]
- National Science Fund for Distinguished Young Scholars [21125522]
- Shanghai Pujiang Program [12JC1403500]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [YJ0130504]
- National Natural Science Foundation of China [21327807]
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Plasmon resonance energy transfer (PRET) has been widely applied in the detection of bio-recognition, heavy metal ions and cellular reactions with high sensitivity, based on the overlap between the plasmon resonance scattering band of nanoparticles and the absorption band of the surface-modified chromophore molecules. Previous sensors based on PRET were all implemented on gold nanospheres with scattering light in the range of 530 to 600 nm. In this work, a PRET-based nanosensor was developed on a thiol-di(2-picolyDamine-modified single gold nanorod for the detection of Cu2+ ions in aqueous solution with high sensitivity and selectivity. Compared to nanospheres, gold nanorods with tunable and wide plasmon resonance bands from the near-infrared to the infrared region exhibit promising potential for development as sensing probes.
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