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P. White and J. Hjortkjaer Preparation and characterisation of a stable silver colloid for SER(R)S spectroscopy Journal of Raman Spectroscopy 45

Article first published online: 25 NOV 2013 | DOI: 10.1002/jrs.4412

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A highly reproducible method for the preparation of a silver colloid for surface-enhanced Raman scattering spectroscopy is described. The colloid, obtained by reduction of silver nitrate with hydroxylamine phosphate, is shown to have a particle size of ~20 nm with a narrow size distribution of 10–30 nm and a shelf life that exceeds 8 months. Ultraviolet–visible and surface-enhanced Raman scattering spectra together with zeta potential, transmission electron microscopy and energy dispersive X-ray data have been used to characterise this colloid.

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