New sensor and device development Optical sensors Surface enhanced Raman Scattering based sensors Localized surface plasomon resonance based sensors Chiral meta material based sensors Electric sensors Magnetic sensors Sensor applications Medical diagnostics: virus, bacteria, biomarker, etc. Food safety: bacteria, pesticide, microtoxins, food additives, etc. Environmental monitoring: pollutions, antimicrobial, metal ions, etc. Defense: explosives, selective agents, etc. Specimen preparation: filtration, thin layer chromatography, microfluidics, etc.