IJUP08 - Universidade do Porto

Absorbance
0,7
0,6
0,5
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0,3
0,2
0,1
Properties of nanostructured materials
C. P. Arieira, F. Silva and C. M. Pereira
Department of Chemistry, Faculty of Science, University of Porto, Portugal.
Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
Synthesis and characterization of gold nanoparticles and their self-assembly on modified
surface for electrochemical studies and sensor applications.
Several synthetic methods were chosen all involving chemical reduction of the metal salt
in the solution. The particles prepared include gold nanoparticles functionalized with
different ligands such as citrate, lysine, cytosine, and different sugares, glucose, sucrose,
sorbitol, manitol and dulcitol.
Absorvance = f (wavelenght(nm))
Glucose
Sorbitol
Sucrose
Manitol
Sorbitol
0
400 450 500 550
Wavelenght(nm)
600 650 700
Figure 1 shows the evolution of UV-vis spectra during the formation of gold nanoparticles using the various
sugares as reducting agents at λmax~523nm.
The experimental results will be analyzed in order to characterize the gold nanoparticles for Voltammetric
Analysis subsequent.
Acknowledgments:
Financial support from FCT (POCI 2010) and FEDER for the project POCI/QUI/57679/2004 is
gratefully acknowledged.
References:
[1] J. Chemistry Education, Synthesis of Colloidal Gold, (2004) 81, 544A.
[2] S. Panigrahi, S. Kundu, S. K. Ghosh, S. Nath, T. Pal, Sugar assisted evolution of mono- and
bimetallic nanoparticles, 264 (2005) 133-138.
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