Au layers 1 Coatings 1 Image enhancement 1 Image resolution 1 Imaging wide-field surface plasmon resonance microscopy sensor 1 Object detection 1 Organic acids 1 Pixels 1 Plasmonics 1 Poly(acrylic acid) 1 Polyacrylic acid 1 Polyelectrolyte brush 1 Polyelectrolyte brushes 1 Polyelectrolytes 1 Sensing devices 1 Signal to noise ratio 1 Surface plasmon resonance 1 Surface plasmon resonance sensing 1 Surface-plasmon resonance 1 Wide-field 1 imaging wide-field SPR microscopy sensor polyacrylic acid (PAA) 1 polyelectrolyte brushes (PEBs) 1