| Issue |
Europhys. Lett.
Volume 46, Number 3, May I 1999
|
|
|---|---|---|
| Page(s) | 346 - 350 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i1999-00267-5 | |
| Published online | 01 September 2002 | |
Nanocomposite gel-derived films by fractal growth of silver
1
Indian Association for the Cultivation of Science - Jadavpur, Calcutta, 700
032 India
2
HA-278, Sector-III, Salt Lake City, Calcutta, 700 091 India
3
Surface Science Group, Institute of Atomic & Molecular Sciences
P.O. Box 23-166, Academia Sinica - Taipei, Taiwan, 106 ROC
Received:
27
August
1998
Accepted:
22
February
1999
Fractal growth of silver metal has been carried out by electrochemical deposition in gel-derived
films of compositions given by x
, 
with x having values of
30, 40 and 50. The structure consists of silver particles with median diameters varying from 9.4
to 31.3 nm. The fractal dimension of the metal grown shows an oscillatory behaviour
as a function of the
electrodeposition voltage. The dielectric breakdown model (DBM) which describes the growth as
arising due to a probabilistic nucleation on the border of the structure has been used to explain
this unusual behaviour. The median particle size can be varied by a suitable combination of the
silver ion concentration in the gel composition and the electrodeposition voltage.
PACS: 61.43.Hv – Fractals; macroscopic aggregates (including diffusion-limited aggregates) / 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials / 81.05.Ys – Nanophase materials
© EDP Sciences, 1999
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