Nanoparticulate platinum films on gold using dendrimer-based wet chemical method
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Nanoparticulate platinum films on gold using
dendrimer-based wet chemical method
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| Creator |
Raghu, S.
Sheela, B. Phani, K.L.N. Yegnaraman, V. |
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| Subject |
Electrodics and Electrocatalysis
Nanotechnology |
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| Description |
There is a growing interest in devising wet chemical alternatives for physical
deposition methods for applications involving thin ¯lms, e.g., catalysis. Deposition of
platinum on thin gold ¯lms is often a problem leading to incomplete coverage and improper
adhesion to solid surfaces. Gold substrates often need pre-activation for achieving complete
coverage. We demonstrate here that dendrimers with proper functionalities and size work
as well-de¯ned nucleating agents and adhesion promoters. This feature is demonstrated
using an amine-terminated dendrimer of generation 4.0. This approach allows one to
obtain adherent nanoparticulate ¯lms of platinum on gold. Unlike other nucleating agents
and adhesion promoting compounds, dendrimers have a well-de¯ned ordered structure in
terms of their space ¯lling ability.
The stability of the ¯lms obtained with adsorbed dendrimers is demonstrated using the
electrocatalytic reactions of fuels like methanol. The ¯lms formed without dendrimers
cannot sustain the electro-oxidation currents due to the instability of the ¯lms while
the ¯lms formed with dendrimers can sustain currents for longer duration and for several
cycles. The dendrimer-derived Pt ¯lms exhibit higher catalytic activity compared to other
methods.
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| Publisher |
A
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/170/1/088-2005.pdf
Raghu, S. and Sheela, B. and Phani, K.L.N. and Yegnaraman, V. (2005) Nanoparticulate platinum films on gold using dendrimer-based wet chemical method. Pramana-Journal of Physics, 65 (5). pp. 821-830. ISSN 0304-4289 |
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| Relation |
http://cecri.csircentral.net/170/
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