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Proceedings Paper

Optical trapping of gold aerosols
Author(s): Regina K. Schmitt; Liselotte Jauffred; S. Mohammad-Reza Taheri; Heiner Linke; Lene B. Oddershede
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Paper Abstract

Aerosol trapping has proven challenging and was only recently demonstrated.1 This was accomplished by utilizing an air chamber designed to have a minimum of turbulence and a laser beam with a minimum of aberration. Individual gold nano-particles with diameters between 80 nm and 200 nm were trapped in air using a 1064 nm laser. The positions visited by the trapped gold nano-particle were quantified using a quadrant photo diode placed in the back focal plane. The time traces were analyzed and the trapping stiffness characterizing gold aerosol trapping determined and compared to aerosol trapping of nanometer sized silica and polystyrene particles. Based on our analysis, we concluded that gold nano-particles trap more strongly in air than similarly sized polystyrene and silica particles. We found that, in a certain power range, the trapping strength of polystyrene particles is linearly decreasing with increasing laser power.

Paper Details

Date Published: 25 August 2015
PDF: 7 pages
Proc. SPIE 9548, Optical Trapping and Optical Micromanipulation XII, 95480F (25 August 2015); doi: 10.1117/12.2188444
Show Author Affiliations
Regina K. Schmitt, Lund Univ. (Sweden)
Liselotte Jauffred, Lund Univ. (Sweden)
Univ. of Copenhagen (Denmark)
S. Mohammad-Reza Taheri, Univ. of Zanjan (Iran, Islamic Republic of)
Heiner Linke, Lund Univ. (Sweden)
Lene B. Oddershede, Univ. of Copenhagen (Denmark)

Published in SPIE Proceedings Vol. 9548:
Optical Trapping and Optical Micromanipulation XII
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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