Aluminum plates Amine functional groups Antibodies Antibody-antigen interactions Antigen-antibody binding Antigens Biosensors Body fluids Bovine serum albumins Calibration Calibration method Confocal microscopy Correction techniques Cut out DNA DNA hybridization DNA molecules DNA sensing Deep reactive ion etching Detection sensitivity Diffraction-limited resolution Direct calibration Dwell time Experiments Fiberoptic probes Fluorescence Fluorescence spectroscopy Fluorescent dyes Focus adjustment Functional groups