Sensing characteristics of NIR localized surface plasmon resonances in gold nanorings for application as ultrasensitive biosensors.

@article{Larsson2007SensingCO,
  title={Sensing characteristics of NIR localized surface plasmon resonances in gold nanorings for application as ultrasensitive biosensors.},
  author={Elin M. Larsson and Joan Alegret and Mikael K{\"a}ll and Duncan S Sutherland},
  journal={Nano letters},
  year={2007},
  volume={7 5},
  pages={1256-63}
}
The optical responses of 75-150 nm diameter gold nanorings to changes in local refractive index have been quantified by near-infrared extinction spectroscopy and compared to DDA calculations and an analytical approach. The "bulk" refractive index sensitivities of gold nanorings are substantially (>5 times) larger than those of nanodisks with similar diameters. Nanorings retain a significantly larger sensitivity than nanodisks at the same spectral position, demonstrating a clear shape dependence… CONTINUE READING
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