Finite element modeling of intermittent flow molecular sorting system for optical microfluidics-based biodetection

Arvind Chandrasekaran; Abtin Nobahar; Muthukumaran Packirisamy

doi:10.1117/12.778903

30 October 2007 Finite element modeling of intermittent flow molecular sorting system for optical microfluidics-based biodetection

Arvind Chandrasekaran, Abtin Nobahar, Muthukumaran Packirisamy

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Proceedings Volume 6796, Photonics North 2007; 679627 (2007) https://doi.org/10.1117/12.778903
Event: Photonics North 2007, 2007, Ottawa, Canada

Abstract

The advent of microfluidics has provided a tremendous boost to the field of health care for the development of practical in-situ medical diagnoses and Point-of-Care (POC) testing methods. Optical microfluidics offers a lot of scope for carrying out successful biodetections through different target detection techniques such as optical absorption, fluorescence, etc. Two main issues in carrying out successful biodetection on microfluidic platform are the problem of biomolecule immobilization onto the surface of the microfluidic channel and efficient mixing of the bio-fluids necessary to achieve proper bio-interaction. In most cases, the biodetection involves two or more biological specimens, such as enzyme-substrate, antigen-antibody, protein-protein etc., and therefore, it is necessary to discover a solution which addresses to the needs of both immobilization and multi-molecular interactions. In this work, a novel technique of flow controlled molecular sorting is presented, wherein, by appropriate design of the microfluidic channel and by careful control of fluid flow in the system, optimal interaction of the specimens can be achieved through biomolecular sorting, thereby overcoming the problem of bio-immobilization onto the surface of the microfluidic channel. Herein, Finite Element Modeling (FEM) of flow behavior within the microfluidic channel has been carried out for different channel geometries, which is essential for the appropriate choice of microfluidic system for the present application. The technique of implementing the immobilization-free multi molecular bio-interactions in the proposed microfluidic system is explained and the feasibility of carrying out optical microfluidics based biodetection is demonstrated.

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Arvind Chandrasekaran, Abtin Nobahar, and Muthukumaran Packirisamy "Finite element modeling of intermittent flow molecular sorting system for optical microfluidics-based biodetection", Proc. SPIE 6796, Photonics North 2007, 679627 (30 October 2007); https://doi.org/10.1117/12.778903

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KEYWORDS

Microfluidics

Biosensing

Finite element methods

Luminescence

Absorption

Biological research

Biomedical optics

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