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The present work discusses a detailed study of the fabrication steps of carboxymethyl-dextran SPR sensor chips with specal focus on the effect of dextran molecular weight (40, 200, and 500 kDa) both on the chip physical characteristics after each fabrication step and on toxin detection performance. Physical characterization was performed using ATR-FTIR, AFM, profilometry, and surface plasmon resonance...
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