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• W2316536674 abstract "Immunoaffinity microfluidic devices have recently become a popular choice to isolate specific cells for many applications. To increase cell capture efficiency, several groups have employed capture beds with nanotopography. However, no systematic study has been performed to quantitatively correlate surface nanopatterns with immunoaffinity cell immobilization. In this work, we controlled substrate topography by depositing close-packed arrays of silica nanobeads with uniform diameters ranging from 100 to 1150 nm onto flat glass. These surfaces were functionalized with a specific antibody and assembled as the base in microfluidic channels, which were then used to capture CD4+ T cells under continuous flow. It is observed that capture efficiency generally increases with nanoparticle size under low flow rate. At higher flow rates, cell capture efficiency becomes increasingly complex; it initially increases with the bead size then gradually decreases. Surprisingly, capture yield plummets atop depositions of some particle diameters. These dips likely stem from dynamic interactions between nanostructures on the substrate and cell membrane as indicated by roughness-insensitive cell capture after glutaraldehyde fixing. This systematic study of surface nanotopography and cell capture efficiency will help optimize the physical properties of microfluidic capture beds for cell isolation from biological fluids." @default.
• W2316536674 created "2016-06-24" @default.
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• W2316536674 date "2011-07-29" @default.
• W2316536674 modified "2023-09-24" @default.
• W2316536674 title "Effect of Surface Nanotopography on Immunoaffinity Cell Capture in Microfluidic Devices" @default.
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• W2316536674 doi "https://doi.org/10.1021/la2015868" @default.
• W2316536674 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21800852" @default.
• W2316536674 hasPublicationYear "2011" @default.
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