Optofluidic device for cytometric measurements and study of inertial focusing conditions in asymmetric serpentines

Identifier:  TDX:2924

Handle: https://hdl.handle.net/20.500.11797/TDX2924

Authors:  Pedrol Ripoll, Eric

Abstract:
An optofluidic device with cytometric capabilities is presented. The device consists of two interrogation regions from which the characteristic fluorescence signature of cell surface-labeled markers is obtained by means of 473 nm pumping. Prior to being measured, the cells are focused employing an hydrodynamical focusing scheme. The signal is treated with a custom algorithm to perform a correlation analysis between the signals from each interrogation region. With this method, the device is able o distinguish between two different cell line populations with antibody specificity. Additionally, studies regarding the behavior of rigid spherical particles under inertial focusing conditions in an asymmetric serpentine are presented. The dynamics of the flow field and the particle under focusing conditions is described employing simulation results. These studies also reveal the predilection of particles to move through the centerlines of the developed vortices. These results can be used to design more efficient and reliable cytometric devices that take advantage of inertial effects in conjunction with transverse flows.