Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Optical trapping of gold nanoparticles using a radially polarized laser beam

[+] Author Affiliations
Anja Huss, Anna M. Chizhik, Regina Jäger, Alexey I. Chizhik, Alfred J. Meixner

Eberhard Karls Univ. Tübingen (Germany)

Proc. SPIE 8097, Optical Trapping and Optical Micromanipulation VIII, 809720 (September 09, 2011); doi:10.1117/12.893959
Text Size: A A A
From Conference Volume 8097

  • Optical Trapping and Optical Micromanipulation VIII
  • San Diego, California, USA | August 21, 2011

abstract

In this work we present new results regarding the optical trapping of single gold nanoparticles with a radially polarized laser beam. Since a radially polarized laser beam possesses a strong longitudinal component of the electric field in the center of the focal area, it opens up new advantages for optical manipulation. We describe a procedure of coating the experimental chamber with a charged polymer and the gold nanoparticles with ligands carrying the same charge as the polymer, thus generating electrostatic repulsion which prevents the nanoparticles from depositing on the bottom surface of the experimental chamber. Our experimental results show that a radially polarized laser beam focused with a high numerical aperture objective lens forms a stable trap of a single gold nanoparticle in aqueous solution. By comparing the duration of the interaction of particles with the trapping laser, we found that the average duration of the interactions with a radial beam is two times longer than with a Gaussian beam. Thus, we demonstrate that a radially polarized laser beam exerts stronger forces on the nanoparticles than the Gaussian beam. These findings provide a new insight into the complex interaction of a nanoparticle with the electromagnetic field of optical tweezers.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Anja Huss ; Anna M. Chizhik ; Regina Jäger ; Alexey I. Chizhik and Alfred J. Meixner
"Optical trapping of gold nanoparticles using a radially polarized laser beam", Proc. SPIE 8097, Optical Trapping and Optical Micromanipulation VIII, 809720 (September 09, 2011); doi:10.1117/12.893959; http://dx.doi.org/10.1117/12.893959


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement

 

 

 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.