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Synthesis and Characterisation of Silver Nanoparticles using High Electrical Charge Density and High Viscosity Organic Polymer

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Author Affiliations

  • 1Department of Chemistry, Gulu University, P.O. Box 166, Gulu, UGANDA
  • 2Department of Chemistry, Makerere University, P.O. Box 7062, Kampala, UGANDA

Res.J.chem.sci., Volume 1, Issue (4), Pages 18-21, July,18 (2011)

Abstract

In this study, we present a facile and cost-effective method for the synthesis of silver nanoparticles (AgNPs)using an organic polymer, hydroxyethyl cellulose (HEC). On the introduction of 0.1% HEC(degree of polymerisation 500) into the reaction mixture, colour changes are observed at different temperatures (30°C-90°C). The prepared samples were characterised using a scanning electron microscope, SEM (Type: JOEL 30-kV), and an X-ray powder diffractometer (Type: Siemens AXS D5005). The UV – Vis spectra were recorded using a Shimadzu (UV – 1601) spectrometer. The X-ray patterns indicated a product comprising a mixture of silver (Ag) and small amounts of silver(I) oxide (Ag2O). The UV-Vis spectra indicated peak positions at around 420nm, consistent with the formation of silver nanoclusters, (Ag)n, made up of very low dimensional nanoparticles. SEM images of the samples at 80°C exhibited the existence of very small and uniformly spherical nanoparticles with sizes <30 nm.Owing to the high electrical charge density and large viscosity of the HEC polymer, particle sizes are restricted. Consequently, the product will contain mono-dispersed Ag-NPs. High yields of Ag-NPs were obtained in relatively short periods of time and at low temperatures. The study therefore would provide a simple, adaptable and cost-effective technique of scientific as well as industrial applicability.

References

  1. Haes A. J. and Van Duyne R. P., Nanosensors Enable Portable Detectors for Environmental and Medical Applications, Laser Focus World, 39, 153 (2003)
  2. Magdassi S., Bassa A., Vinetsky Y. and Kamyshny A., Silver Nanoparticles as Pigments for Water-based Ink-Jet Inks, Chem. Mater., 15, 2208 (2003)
  3. Nie S. and Emory S.R., Probing Single Molecules and Single Nanoparticles by Surface-enhanced Raman Scattering, Science, 275, 1102 (1997)
  4. Pradhan N., Pal A. and Pal T., Silver Nanoparticle Catalyzed Reduction of Aromatic Nitro Compounds, Colloids Surf. A: Physicochem. Eng. Asp., 196(2), 247 (2002)
  5. Ye L., Lai Z., Liu J. and Tholen A., Effect of Ag Particle Size on Electrical Conductivity of Isotropically Conductive Adhesives, IEEE Trans. Electron. Packag. Manuf., 22(4), 299 (1999)
  6. Jana N.R., Gearheart L. and Murphy C.J.,Seed-Mediated Growth Approach for Shape Controlled Synthesis of Spheroidal and Rodlike Gold Nanoparticles using a Surfactant Template,Adv. Mater., 13, 1389 (2001)
  7. Chen S. and Carroll D.L., Synthesis and Characterization of Truncated Triangular Silver Nanoplates, Nano Lett., 1003 (2002)
  8. Maillard M., Giorgio S. and Pileni M.P., Silver Nanodisks, Adv. Mater., 14, 1084 (2002)
  9. Yener D.O., Sindel J., Randall C.A. and Adair J.H., Synthesis of Nanosized Particles in Octylamine – Water Bilayer System, Langmuir18, 8692 (2002)
  10. Sun Y., Mayers B., Herricks T. and Xia Y., Transformation of Silver Nanospheres into Nanobelts and Triangular Nanoplates through a Thermal Process, Nano Lett.,, 675 (2003)
  11. Brust M., Walker M., Bethel D., Schiffrin D.J. and Whyman R., Synthesis of thiol-derivatised gold nanoparticles in a two-phase Liquid–Liquid system, J. Chem. Soc., Chem. Commun., 7, 801 ( 1994)
  12. Sougata S., Jana A.D., Samanta S.K. and Mostafa G., Facile Synthesis of silver nanoparticles with highly efficient anti-microbial property, Polyhedron26, 4419 (2007)
  13. Murray C.B. and Sun S., Strategies of Large Scale Synthesis of Monodisperse Nanoparticles, US20016262129 (2001)
  14. Murray C.B., Norris D.J. and Bawendi M.G., Synthesis and characterization of nearly monodisperse CdE (E = S, Se, Te) semiconductor nanocrystallites, J. Amer. Chem. Soc., 115, 8706 (1993)
  15. Hyeon T., Strategies of Large Scale Synthesis of Monodisperse Nanoparticles,US20040247503(2004)
  16. Alsop G.M., Waggy G.T. and Conway R.A., Bacterial Growth Inhibition Test, J. Water Poll. Control Fed., 52(10), 2452 (1980)
  17. Prashant J. and Pradeep T., Potential of Silver Nanoparticle-Coated Polyurethane Foam As an Antibacterial Water Filter, Biotech. Bioengineer., 90(1), 59 (2005)