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Proceedings Paper

Gold nanoparticle sizing based on differential static light scattering spectroscopy, absorption spectroscopy, and dynamic light scattering
Author(s): Vladimir A. Bogatyrev; Lev A. Dykman; Boris N. Khlebtsov; Anna V. Alekseyeva; Andrei A. Polyakov; Nikolai G. Khlebtsov
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Paper Abstract

Three procedures for determining the average size of colloidal gold (CG) nanoparticles are described. The first procedure is the dynamic light scattering (DLS) method. The others are based on the estimation of extinction or differential static light scattering (DSLS, at 90 degrees) peak positions. Experimental studies were carried out with four samples of CG (the average DLS-diameters were equal to 15, 20, 25, and 30 nm). In the case of DSLS, the angular slope of the calibration curve "peak position versus particle size" was 2.4 times greater than the extinction curve slope. In experiments with controlled polydispersity, two different colloid mixtures were used. Extinction spectra of samples were almost identical, whereas the DSLS spectra showed noticeable differences with a red shifted maximum. The theoretical simulations by the Mie theory are in agreement with these experimental observations. The DSLS technique seems more reliable and accurate in CG particle sizing, as compared with the usual absorption spectroscopy.

Paper Details

Date Published: 14 July 2004
PDF: 10 pages
Proc. SPIE 5475, Saratov Fall Meeting 2003: Coherent Optics of Ordered and Random Media IV, (14 July 2004); doi: 10.1117/12.568570
Show Author Affiliations
Vladimir A. Bogatyrev, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Saratov State Univ. (Russia)
Lev A. Dykman, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Boris N. Khlebtsov, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Anna V. Alekseyeva, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Saratov State Univ. (Russia)
Andrei A. Polyakov, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Nikolai G. Khlebtsov, Institute of Biochemistry and Physiology of Plants and Microorganisms (Russia)
Saratov State Univ. (Russia)


Published in SPIE Proceedings Vol. 5475:
Saratov Fall Meeting 2003: Coherent Optics of Ordered and Random Media IV
Dmitry A. Zimnyakov, Editor(s)

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