We report 3D multiple trapping of dielectric polystyrene (PS) beads and gold nano-particles (GNPs) in single beam optical tweezers system using an asymmetric beam of inhomogeneous intensity distribution. This special kind of beam of quasi-TEM11 profile was generated from intra-cavity CW-laser source operating at 532 nm. Multiple trapping of both the low refractive index rod-like Escherichia coli bacteria and 253 nm plasmonic GNPs dispersed in 1.025 μm PS beads which were homogenized in de-ionized water was realized utilizing this spatial beam. Laser-GNPs interaction rendered the enhancement of local surface plasmon resonance field around GNPs causing long-range aggregation of PS beads. The multiple trapping of plasmonic GNPs by the present simple method might find applications for micro- and nano-connectors, underlying physical processes in light-matter interaction assays for inter-particle force analysis, cancer diagnostic and photothermolysis, surface-enhanced Raman scattering (SERS) spectroscopy, and surface plasmon based biological and chemical sensors.
Concisely bringing the latest news and relevant information regarding optical trapping and micromanipulation research.
Thursday, May 6, 2010
3D multiple optical trapping of Au-nanoparticles and prokaryote E. coli using intra-cavity generated non-circular beam of inhomogeneous intensity
R. Kumar, C. Shakher and D. S. Mehta
We report 3D multiple trapping of dielectric polystyrene (PS) beads and gold nano-particles (GNPs) in single beam optical tweezers system using an asymmetric beam of inhomogeneous intensity distribution. This special kind of beam of quasi-TEM11 profile was generated from intra-cavity CW-laser source operating at 532 nm. Multiple trapping of both the low refractive index rod-like Escherichia coli bacteria and 253 nm plasmonic GNPs dispersed in 1.025 μm PS beads which were homogenized in de-ionized water was realized utilizing this spatial beam. Laser-GNPs interaction rendered the enhancement of local surface plasmon resonance field around GNPs causing long-range aggregation of PS beads. The multiple trapping of plasmonic GNPs by the present simple method might find applications for micro- and nano-connectors, underlying physical processes in light-matter interaction assays for inter-particle force analysis, cancer diagnostic and photothermolysis, surface-enhanced Raman scattering (SERS) spectroscopy, and surface plasmon based biological and chemical sensors.
We report 3D multiple trapping of dielectric polystyrene (PS) beads and gold nano-particles (GNPs) in single beam optical tweezers system using an asymmetric beam of inhomogeneous intensity distribution. This special kind of beam of quasi-TEM11 profile was generated from intra-cavity CW-laser source operating at 532 nm. Multiple trapping of both the low refractive index rod-like Escherichia coli bacteria and 253 nm plasmonic GNPs dispersed in 1.025 μm PS beads which were homogenized in de-ionized water was realized utilizing this spatial beam. Laser-GNPs interaction rendered the enhancement of local surface plasmon resonance field around GNPs causing long-range aggregation of PS beads. The multiple trapping of plasmonic GNPs by the present simple method might find applications for micro- and nano-connectors, underlying physical processes in light-matter interaction assays for inter-particle force analysis, cancer diagnostic and photothermolysis, surface-enhanced Raman scattering (SERS) spectroscopy, and surface plasmon based biological and chemical sensors.
No comments:
Post a Comment