Spectrophotometric observations of the adsorption of organosulfur compounds on colloidal silver nanoparticles

Article Abstract:

The interaction of silver particles with various organosulfur compounds has been studied to shed light on nanoparticle-adsorbate reactions. Silver was selected because the adsorption of compounds on this element can be measured spectrophotometrically. A silver colloid was prepared through the photochemical reduction of Ag+ ions. The colloid is found to have a very intense surface plasmon absorption band after the silver ions have been totally reduced. It has a wavelength close to 380 nm in water and is damped by small amounts of carbon disulfide, thiophenol and diethyl disulfide.

Organosulfur compounds, Organic sulfur compounds, Silver

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Photoluminescence enhancement of porous silicon by organic cyano compounds

Article Abstract:

Organic cyano compounds such as 1,2-dicyanoethylene, 1,3-dicyanobenzene, 1,4-dicyanobenzene and 1-cyanonaphthalene have been used in enhancing the photoluminescence (PL) of oxidized porous silicon (PS). It was found that PL was dependent on the steric effects and electronic properties of the cyano compounds. Fourier transform infrared spectra revealed that surface Si-H bonds have not been altered and no new luminescent compounds have been formed on the surface of PS.

Spectra, Silicon, Photoluminescence

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Sorption of chlorhexidine on cellulose: Mechanism of binding and molecular recognition

Article Abstract:

The adsorption isotherms constructed by application of chlorhexidine (CH) to cellulose which displayed good correlation with Freundlich isotherm at higher concentrations is reported.

Electric properties, Chlorhexidine, Cellulose

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