Measurement of nanoparticle sizes by conventional optical microscopy with standing evanescent field illumination.

@article{Yu2008MeasurementON,
  title={Measurement of nanoparticle sizes by conventional optical microscopy with standing evanescent field illumination.},
  author={Xueqing Yu and Yukihiro Araki and Kentaro Iwami and Norihiro Umeda},
  journal={Optics letters},
  year={2008},
  volume={33 23},
  pages={
          2794-6
        }
}
The size of a particle smaller than the diffraction limit is measured using a conventional optical microscope by adopting a standing evanescent field illumination. The scattering intensity from a nanoparticle is periodically modulated by shifting the intensity fringes of the standing evanescent field. By measuring contrast of scattering intensity variation during one cycle of modulation, particle sizes can be estimated easily. Furthermore, material dependence can be canceled using contrast as… CONTINUE READING
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