Optical trapping of gold aerosols

TY - GEN

T1 - Optical trapping of gold aerosols

AU - Schmitt, Regina K.

AU - Pedersen, Liselotte Jauffred

AU - Taheri, S. M.

AU - Linke, Heiner

AU - Oddershede, Lene Broeng

PY - 2015/8/25

Y1 - 2015/8/25

N2 - 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.

AB - 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.

KW - Aerosol

KW - aerotaxy

KW - air

KW - gold nano-particles

KW - laser manipulation

KW - optical tweezers

KW - polystyrene nano-particles

KW - power spectral analysis

UR - http://www.scopus.com/inward/record.url?scp=84950994256&partnerID=8YFLogxK

U2 - 10.1117/12.2188444

DO - 10.1117/12.2188444

M3 - Article in proceedings

AN - SCOPUS:84950994256

SN - 9781628417142

SN - 9781628417142

VL - 9548

BT - Proceedings of SPIE - The International Society for Optical Engineering

PB - SPIE - International Society for Optical Engineering

T2 - Optical Trapping and Optical Micromanipulation XII

Y2 - 9 August 2015 through 12 August 2015

ER -