Surface-enhanced Raman scattering (SERS) provides rapid fingerprinting of biomaterial in a non-destructive manner. The adsorption of colloidal silver to biological material suppresses native biofluorescence while increasing the normal Raman signal via the surfaceenhanced Raman effect. This work validates the applicability of qualitative SER spectroscopy, utilizing principal component analysis (...

Tests for acute oral toxicity, eye irritation, corrosion and dermal toxicity of colloidal silver nanoparticles (AgNPs) were conducted in laboratory animals following OECD guidelines. Oral administration of AgNPs at a limited dose of 5,000 mg/kg produced neither mortality nor acute toxic signs throughout the observation period. Percentage of body weight gain of the mice showed no significant dif...

Holographic gratings are recorded in colloidal suspensions of silver nanoparticles by utilizing interfering nanosecond pulses. The diffraction efficiency is measured with continuous-wave light. An instantaneous response together with a transient grating are observed: the nanoparticles absorb the pump light and heat up. Heat is transferred to the solvent, and a delayed thermal grating appears. T...

The surface enhanced Raman spectra of halide ions adsorbed on colloidal silver surfaces can be explained by an interacting dipole model of a discrete adsorbate superlattice. Both (100) and (111) surfaces have been modeled, and simulated spectra for a range of adsorbate coverage fractions and sol particle facet sizes give good agreement with experimental spectra. The model is useful for assessin...

The present study demonstrates a green process for the synthesis of spherical-shaped and stabilized silver nanoparticles Ag NPs using gamma irradiated conditions. This method has certain advantages over conventional methods since it can manage particle size structure generates totally reduced extremely pure free from by-products or chemical reducing agents. Silver composite (Ag / CM) is prepare...

This study investigated the effect of molar concentration colloidal silver nanoparticles that enhanced Raman signal on Surface-Enhanced Scattering (SERS) substrate performance. Colloidal were fabricated as SERS a glass microscope using drop-casting method. have been synthesized separately in different concentrations 5 x 10−4 M (sample 1) and 20 2) from nitrate (AgNO3) irradiated by femtosecond ...