Structures having plasmonic properties due to unique optical and electrical properties, become important for various application fields including biosensors, nanosensors, nanodevices, catalysis, and nanoelectrochemistry. The morphology and chemical composition of nanoparticles determine the unique properties of nanoparticles which can be used for various practical applications. For instance, electrodes textured with metal nanoparticle have a faster and higher current response than conventional electrodes without nanoparticles. Metal nanoparticles provide four main advantages over macroelectrodes for electroanalysis: 1) enhancement of mass transport, 2) catalysis, 3) high effective surface area, and 4) control over local microenvironment. Therefore, electrodes textured with metal nanoparticles can be used for fabrication of high sensitive, selective, stable and cheap electrochemical sensors, and can be an excellent alternative to enzyme-coated electrochemical sensors. In addition, properly functionalized substrates containing nanoparticles can be used for the creation of a new generation substrates for surface enhanced Raman spectroscopy (SERS) measurements. The new generation substrates of SERS are in high demand for single-molecule detection and can be used in more accurate Raman spectral studies of different materials.