Raman spectroscopy Technology: general issues 15 History of engineering & technology 11 Research & information: general 9 mechanical properties 6 Chemistry 5 X-ray diffraction 4 amino acids 4 coating 4 graphene 4 image processing 4 magnetron sputtering 4 microstructure 4 spectroscopy 4 Raman 3 SEM 3 adsorption 3 atomic layer deposition 3 biosensor 3 biosensors 3 chitosan 3 classification 3 copper 3 copper oxide 3 crystal structure 3 degradation 3 graphene oxide 3 hyperspectral imaging 3 imaging 3 molecular dynamics 3