Optical microscopy measurement of pair correlation functions

Ramírez-Saito, Angeles; Bechinger, Clemens; Arauz-Lara, José Luis

Optical microscopy measurement of pair correlation functions

Files

Ramirez-Saito_0-410589.pdf(3.34 MB)

Date

2006

Authors

Ramírez-Saito, Angeles

Bechinger, Clemens

Arauz-Lara, José Luis

Publication type

Journal article

Publication status

Published

Published in

Physical Review E ; 74 (2006), 3. - 030401. - ISSN 1539-3755. - eISSN 1550-2376

Abstract

We studied the pair correlation function g(r) of silica particles with a fluorescent core and a nonfluorescent shell which were confined between two glass plates by optical video microscopy. To investigate the possible role of optical artifacts due to overlapping particle images, we compared experiments, where, first, the whole particle (white image) and then, only the fluorescent core (fluorescent image) was used for determining particle positions. While under white-image conditions the observed g(r) exhibits a main peak at about 1.2 times the particle's diameter; under fluorescent image conditions the obtained g(r) resembles a short-ranged repulsive system where the main peak is close to contact. This discrepancy points towards artifacts of video microscopy, leading to erroneous g(r) and in turn to erroneous effective-pair potentials.

Subject (DDC)

530 Physics

Cite This

ISO 690

RAMÍREZ-SAITO, Angeles, Clemens BECHINGER, José Luis ARAUZ-LARA, 2006. Optical microscopy measurement of pair correlation functions. In: Physical Review E. 74(3), 030401. ISSN 1539-3755. eISSN 1550-2376. Available under: doi: 10.1103/PhysRevE.74.030401

BibTex

@article{RamirezSaito2006-09-01Optic-39211,
  year={2006},
  doi={10.1103/PhysRevE.74.030401},
  title={Optical microscopy measurement of pair correlation functions},
  number={3},
  volume={74},
  issn={1539-3755},
  journal={Physical Review E},
  author={Ramírez-Saito, Angeles and Bechinger, Clemens and Arauz-Lara, José Luis},
  note={Article Number: 030401}
}

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