Chitosan Capped Colloidal Gold Nanoparticles for Sensing Zinc Ions in Water

• DOI: 10.4028/www.scientific.net/jnanor.16.55
• Publication Date: 2012-02-10T11:03:23Z
• Authors: Sujira Promnimit; T. Bera; S. Baruah; Joydeep Dutta
• Keywords: Multidisciplinary; Physics; Materials Science; ion beam deposition; molecular magnetism; 01 natural sciences; 0104 chemical sciences; SORBENTS; Zinc ion; Sensing; Applied; Colloid; Nanoparticles; scanning tunneling microscopy; Electrospray mass spectrometry; Nanoscience & Nanotechnology; inelastic tunneling spectroscopy

In this work, we report sensing of Zn2+ ions using chitosan capped colloidal gold nanoparticles in aqueous media. The capping not just acted as an electro-static stabilizer to the nanoparticles, but also could bind if present solution. However, chelation decreased stability hence shifted surface plasmon peak higher wavelengths. extent red shift was found be dependent on concentration and therefore presence determined both qualitatively quantitatively by analyzing optical spectra nanoparticles. capability affected size which tuned adjusting molar ratio reducing agent salt desired levels. Optical characteristics showed satisfactory results estimating amount water. This is thus a promising method for spot assessment heavy metal ion concentrations