Falko Schmidt is presenting a reconfigurable optofluidic platform for the precise manipulation of local fluid flows and particle movement at the DPG Spring Meeting in Dresden, Germany.
Title of Talk: 3D Optofluidic Control Using Reconfigurable Thermal Barriers
Title of Talk: 3D Optofluidic Control Using Reconfigurable Thermal Barriers
Time/Date: 16:15 CET/09.03.2025
Place: TU Dresden, Dresden, Germany
Abstract:
Optothermal manipulation enables precise control of small particles via optical and thermal forces, leveraging thermo-osmotic and con- vective flows for short- and long-range motion. We present a recon- figurable optofluidic method enabling diverse manipulations such as guiding, sorting, trapping, and separating particles. Using light ab- sorption on plasmonic surfaces of gold nanorods, localized hot spots are generated, creating temperature-driven flows. A near-infrared laser spatially modulates temperature landscapes, monitored by 3D holo- graphic microscopy and optical diffraction tomography. Single and double heat sources produce three-dimensional flow control. This cr ates an optofluidic barrier that redirects particles within a microfluidic chamber. This approach offers a versatile foundation for advancing microfluidic technologies, enabling applications in sorting, trapping, and adaptive system design.
Optothermal manipulation enables precise control of small particles via optical and thermal forces, leveraging thermo-osmotic and con- vective flows for short- and long-range motion. We present a recon- figurable optofluidic method enabling diverse manipulations such as guiding, sorting, trapping, and separating particles. Using light ab- sorption on plasmonic surfaces of gold nanorods, localized hot spots are generated, creating temperature-driven flows. A near-infrared laser spatially modulates temperature landscapes, monitored by 3D holo- graphic microscopy and optical diffraction tomography. Single and double heat sources produce three-dimensional flow control. This cr ates an optofluidic barrier that redirects particles within a microfluidic chamber. This approach offers a versatile foundation for advancing microfluidic technologies, enabling applications in sorting, trapping, and adaptive system design.