Planar Photonic Crystal Biosensor for Quantitative Label-Free Cell Attachment Microscopy.

ABSTRACT: In this study, a planar-surface photonic crystal (PC) biosensor for quantitative, kinetic, label-free imaging of cell-surface interactions is demonstrated. The planar biosensor surface eliminates external stimuli to the cells caused by substrate topography to more accurately reflect smooth surface environment encountered by many cell types in vitro. Here, a fabrication approach that combines nanoreplica molding and a horizontal dipping process is used to planarize the surface of the PC biosensor. The planar PC biosensor maintains a high detection sensitivity that enables the monitoring of live cell-substrate interactions with spatial resolution sufficient for observing intracellular attachment strength gradients and the extensions of filopodia from the cell body. The evolution of cell morp

SUBMITTER: Chen W 

PROVIDER: S-EPMC4750395 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature