DENSITY FUNCTIONAL THEORY CALCULATIONS HEAVY METALS SENSORS GRAPHITIZING POLYMER BIODEGRADATION MICROFLUIDIC SURFACTANTS MICROCHIP ELECTROPHORESIS POLYMERIC DEVICES BULK MODIFICATION CELLULOSE NANOSTRUCTURES (CNSS) BIOANALYSIS PDMS APTAMER TITANIUM ALLOYS SERS COPPER VOLTAMMETRIC SENSORS ETHANOL CELLULOSE NANOCRYSTALS LAB ON A CHIP OSTE POLYMERS GOLD NANOPARTICLES MICROSTRUCTURAL CHARACTERIZATION COATINGS HYDROXYAPATITE ALDOL CONDENSATION COVID-19 MICROTAS STABILIZATION MICROCHIP POWDER METALLURGY