Gold colloidals optical characterization by observing their scattering polarization

Bassam Al-Qadi, Toshiharu Saiki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Polarized light scattering is utilized to measure the optical anisotropy and the aspect ratio for nearly spherical colloidal gold nanoparticles as well as to observe their rotational dynamics which were detected as fluctuations in the time-trace of the scattering polarization. A comparison between the measured distributions of maximum anisotropy and aspect ratio with those distributions calculated based on the TEM images analysis are found to show an excellent agreement confirming the validity of our approach. Our method has the advantage to be simple, easy to implement, and can yield access to different projections of the particle due to its rotational diffusion. The range of aspect ratios for the sample being studied is 1 ~ 1.3 and another results for rods with aspect ratio of 2.4 is discussed. Gold nanoparticles have a good biocompatibility where the possibility of conjugation to a variety of biomolecules and antibodies make them suitable for optical imaging and optical probes which can be used for nanoscale orientaional sensing to monitor orientations and rotations of biomolecules during their functional task.

Original languageEnglish
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7577
DOIs
Publication statusPublished - 2010
EventPlasmonics in Biology and Medicine VII - San Francisco, CA, United States
Duration: 2010 Jan 252010 Jan 28

Other

OtherPlasmonics in Biology and Medicine VII
CountryUnited States
CitySan Francisco, CA
Period10/1/2510/1/28

Fingerprint

Anisotropy
Gold
Nanoparticles
aspect ratio
Aspect ratio
Scattering
Polarization
gold
Gold Colloid
Optical Imaging
Biomolecules
polarization
scattering
Optical anisotropy
Light
nanoparticles
anisotropy
Antibodies
biocompatibility
Light polarization

Keywords

  • Gold nanoparticles
  • Optical anisotropy
  • Polarization
  • Scattering

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Al-Qadi, B., & Saiki, T. (2010). Gold colloidals optical characterization by observing their scattering polarization. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7577). [75770V] https://doi.org/10.1117/12.841794

Gold colloidals optical characterization by observing their scattering polarization. / Al-Qadi, Bassam; Saiki, Toshiharu.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7577 2010. 75770V.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Al-Qadi, B & Saiki, T 2010, Gold colloidals optical characterization by observing their scattering polarization. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7577, 75770V, Plasmonics in Biology and Medicine VII, San Francisco, CA, United States, 10/1/25. https://doi.org/10.1117/12.841794
Al-Qadi B, Saiki T. Gold colloidals optical characterization by observing their scattering polarization. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7577. 2010. 75770V https://doi.org/10.1117/12.841794
Al-Qadi, Bassam ; Saiki, Toshiharu. / Gold colloidals optical characterization by observing their scattering polarization. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7577 2010.
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