Mr. Tejas S. Inamdar Profile

Tejas S. Inamdar

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Proceedings Article | 9 March 2013 Paper

Characterizing fluidic seals for on-board reagent delivery

Tejas Inamdar, Brian Anthony

Proceedings Volume 8615, 861516 (2013) https://doi.org/10.1117/12.2006257

KEYWORDS: Aluminum, Coating, Microfluidics, Manufacturing, Point-of-care devices, Chemical analysis, Diagnostics, Mechanics, Sensors, Thermal analysis

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The reagent delivery mechanism in a point-of-care, HIV diagnostic, microfluidic device is studied. Reagents held in an aluminum blister pack are released on the opening of a fluidic seal. The fluidic seals, controlling the flow of reagents, are characterized to reduce anomalies in the desired flow pattern. The findings of this research can be divided into three categories – 1) bonding phenomenon 2) influence of seal pattern on flow and rupture mechanics and 3) process parameters which minimize flow anomalies. Four seal patterns – line hemisphere, line flat, chevron hemisphere and chevron flat were created and tested for reagent delivery using a flow sensor and a force gauge. Experiments suggest that one of the patterns – line-flat – inducted the fewest flow anomalies. A parameter scoping exercise of the seal manufacturing process parameters (temperature, time, pressure) was performed for the line flat seal. Temperature, time, pressure / gap and distance settings which minimize flow anomalies were found.

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