Abstract: Arterial disease, especially Coronary Artery Disease (CAD) is one of the leading causes... more Abstract: Arterial disease, especially Coronary Artery Disease (CAD) is one of the leading causes of premature morbidity and mortality. During the flow, blood not only interacts with vessel wall mechanically but also chemically which modulates the plaque formation in blood vessel thus leading to coronary artery diseases. Here we propose to simulate a MEMS based flexible flow sensor based on anemometer principle which is designed to integrate at a catheter tip.
Development of flexible sensors/electronics over substrates thicker than 100 μm is of immense imp... more Development of flexible sensors/electronics over substrates thicker than 100 μm is of immense importance for its practical feasibility. However, unlike over ultrathin films, large bending stress hinders its flexibility. Here we have employed a novel technique of fabricating sensors over a non-planar ridge topology under pre-stretched condition which not only helps in spontaneous generation of large and uniform parallel buckles upon release, but also acts as stress reduction zones thereby preventing Poisson’s ratio induced lateral cracking. Further, we propose a complete lithography compatible process to realize flexible sensors over pre-stretched substrates thicker than 100 μm that are released through dissolution of a water soluble sacrificial layer of polyvinyl alcohol. These buckling assisted flexible sensors demonstrated superior performance along different flexible modalities. Based on the above concept, we also realized a micro thermal flow sensor, conformally wrapped around angiographic catheters to detect flow abnormalities for potential applications in interventional catheterization process.
Abstract: Arterial disease, especially Coronary Artery Disease (CAD) is one of the leading causes... more Abstract: Arterial disease, especially Coronary Artery Disease (CAD) is one of the leading causes of premature morbidity and mortality. During the flow, blood not only interacts with vessel wall mechanically but also chemically which modulates the plaque formation in blood vessel thus leading to coronary artery diseases. Here we propose to simulate a MEMS based flexible flow sensor based on anemometer principle which is designed to integrate at a catheter tip.
Development of flexible sensors/electronics over substrates thicker than 100 μm is of immense imp... more Development of flexible sensors/electronics over substrates thicker than 100 μm is of immense importance for its practical feasibility. However, unlike over ultrathin films, large bending stress hinders its flexibility. Here we have employed a novel technique of fabricating sensors over a non-planar ridge topology under pre-stretched condition which not only helps in spontaneous generation of large and uniform parallel buckles upon release, but also acts as stress reduction zones thereby preventing Poisson’s ratio induced lateral cracking. Further, we propose a complete lithography compatible process to realize flexible sensors over pre-stretched substrates thicker than 100 μm that are released through dissolution of a water soluble sacrificial layer of polyvinyl alcohol. These buckling assisted flexible sensors demonstrated superior performance along different flexible modalities. Based on the above concept, we also realized a micro thermal flow sensor, conformally wrapped around angiographic catheters to detect flow abnormalities for potential applications in interventional catheterization process.
Uploads
Conference Presentations by Soumen Das
Papers by Soumen Das