Bacterial 1 Bacterial detection 1 Calcium carbonate 1 Capsule 1 Capsules 1 Deposition 1 Drug delivery 1 Enhanced Raman scattering 1 Layer by layer 1 Layer-by-layer approaches 1 Layer-by-layer assemblies 1 LbL Macromolecules 1 Microcapsules 1 Microstructure 1 Multilayer 1 Nanoparticles 1 Polyelectrolyte 1 Polyelectrolytes 1 Raman scattering 1 SERS 1 Surface enhanced Raman 1 Surface enhanced raman scattering 1 Surface scattering 1